/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:57:12,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:57:12,452 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:57:12,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:57:12,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:57:12,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:57:12,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:57:12,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:57:12,482 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:57:12,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:57:12,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:57:12,485 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:57:12,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:57:12,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:57:12,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:57:12,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:57:12,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:57:12,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:57:12,487 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:57:12,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:57:12,487 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:57:12,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:57:12,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:57:12,488 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:57:12,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:57:12,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:57:12,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:57:12,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:57:12,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:57:12,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:57:12,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:57:12,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:57:12,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:57:12,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:57:12,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:57:12,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:57:12,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:57:12,674 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:57:12,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-11-17 15:57:13,726 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:57:13,858 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:57:13,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-11-17 15:57:13,864 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f032f509/9a0f5d61b42f4dcfb109271f89cd1a8f/FLAG480da7c52 [2023-11-17 15:57:13,876 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f032f509/9a0f5d61b42f4dcfb109271f89cd1a8f [2023-11-17 15:57:13,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:57:13,879 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:57:13,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:57:13,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:57:13,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:57:13,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:57:13" (1/1) ... [2023-11-17 15:57:13,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201f7b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:13, skipping insertion in model container [2023-11-17 15:57:13,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:57:13" (1/1) ... [2023-11-17 15:57:13,905 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:57:14,034 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-17 15:57:14,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:57:14,049 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:57:14,065 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-17 15:57:14,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:57:14,083 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:57:14,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14 WrapperNode [2023-11-17 15:57:14,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:57:14,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:57:14,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:57:14,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:57:14,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,109 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 135 [2023-11-17 15:57:14,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:57:14,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:57:14,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:57:14,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:57:14,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:57:14,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:57:14,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:57:14,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:57:14,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (1/1) ... [2023-11-17 15:57:14,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:57:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:14,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:57:14,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:57:14,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:57:14,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 15:57:14,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 15:57:14,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 15:57:14,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 15:57:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:57:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:57:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:57:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 15:57:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:57:14,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:57:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:57:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:57:14,199 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:57:14,299 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:57:14,300 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:57:14,572 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:57:14,586 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:57:14,586 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 15:57:14,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:57:14 BoogieIcfgContainer [2023-11-17 15:57:14,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:57:14,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:57:14,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:57:14,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:57:14,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:57:13" (1/3) ... [2023-11-17 15:57:14,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649c610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:57:14, skipping insertion in model container [2023-11-17 15:57:14,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:57:14" (2/3) ... [2023-11-17 15:57:14,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649c610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:57:14, skipping insertion in model container [2023-11-17 15:57:14,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:57:14" (3/3) ... [2023-11-17 15:57:14,592 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-17 15:57:14,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:57:14,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:57:14,604 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:57:14,658 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:57:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 482 flow [2023-11-17 15:57:14,744 INFO L124 PetriNetUnfolderBase]: 21/232 cut-off events. [2023-11-17 15:57:14,745 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:57:14,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 232 events. 21/232 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 243 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 159. Up to 3 conditions per place. [2023-11-17 15:57:14,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 482 flow [2023-11-17 15:57:14,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 223 transitions, 458 flow [2023-11-17 15:57:14,760 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:57:14,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 223 transitions, 458 flow [2023-11-17 15:57:14,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 223 transitions, 458 flow [2023-11-17 15:57:14,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 223 transitions, 458 flow [2023-11-17 15:57:14,827 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-11-17 15:57:14,827 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:57:14,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 159. Up to 3 conditions per place. [2023-11-17 15:57:14,830 INFO L119 LiptonReduction]: Number of co-enabled transitions 3008 [2023-11-17 15:57:20,148 INFO L134 LiptonReduction]: Checked pairs total: 3462 [2023-11-17 15:57:20,149 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-11-17 15:57:20,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:57:20,163 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@766de658, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:57:20,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:57:20,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:57:20,167 INFO L124 PetriNetUnfolderBase]: 7/24 cut-off events. [2023-11-17 15:57:20,167 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:57:20,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:20,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:20,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:20,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1216028637, now seen corresponding path program 1 times [2023-11-17 15:57:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449179344] [2023-11-17 15:57:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:20,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449179344] [2023-11-17 15:57:20,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449179344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:20,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:20,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:57:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680305418] [2023-11-17 15:57:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:20,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:57:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:57:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:57:20,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 479 [2023-11-17 15:57:20,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:20,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:20,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 479 [2023-11-17 15:57:20,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:20,784 INFO L124 PetriNetUnfolderBase]: 112/192 cut-off events. [2023-11-17 15:57:20,784 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:57:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 192 events. 112/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 548 event pairs, 51 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 338. Up to 151 conditions per place. [2023-11-17 15:57:20,795 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 35 selfloop transitions, 1 changer transitions 5/41 dead transitions. [2023-11-17 15:57:20,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 188 flow [2023-11-17 15:57:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:57:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:57:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-11-17 15:57:20,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43789144050104384 [2023-11-17 15:57:20,808 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-11-17 15:57:20,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-11-17 15:57:20,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:20,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-11-17 15:57:20,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:20,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:20,823 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 839 transitions. [2023-11-17 15:57:20,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 188 flow [2023-11-17 15:57:20,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 15:57:20,827 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2023-11-17 15:57:20,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-11-17 15:57:20,831 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-11-17 15:57:20,831 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2023-11-17 15:57:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:20,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:20,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:57:20,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:20,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 386120865, now seen corresponding path program 2 times [2023-11-17 15:57:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439462463] [2023-11-17 15:57:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:21,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:21,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439462463] [2023-11-17 15:57:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439462463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:21,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:21,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:57:21,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280029870] [2023-11-17 15:57:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:21,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:57:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:57:21,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:57:21,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 479 [2023-11-17 15:57:21,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:21,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 479 [2023-11-17 15:57:21,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:21,130 INFO L124 PetriNetUnfolderBase]: 119/215 cut-off events. [2023-11-17 15:57:21,130 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-17 15:57:21,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 215 events. 119/215 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 682 event pairs, 67 based on Foata normal form. 5/172 useless extension candidates. Maximal degree in co-relation 466. Up to 179 conditions per place. [2023-11-17 15:57:21,133 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 31 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-17 15:57:21,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 179 flow [2023-11-17 15:57:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:57:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:57:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-11-17 15:57:21,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43684759916492694 [2023-11-17 15:57:21,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-11-17 15:57:21,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-11-17 15:57:21,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:21,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-11-17 15:57:21,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,143 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 837 transitions. [2023-11-17 15:57:21,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 179 flow [2023-11-17 15:57:21,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 15:57:21,148 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2023-11-17 15:57:21,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-17 15:57:21,149 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:57:21,149 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2023-11-17 15:57:21,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:21,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:21,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:57:21,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:21,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash 123395315, now seen corresponding path program 1 times [2023-11-17 15:57:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:21,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128783025] [2023-11-17 15:57:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:21,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:21,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:21,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128783025] [2023-11-17 15:57:21,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128783025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:21,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:21,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:57:21,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362528894] [2023-11-17 15:57:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:21,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:57:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:57:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:57:21,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-11-17 15:57:21,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:21,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-11-17 15:57:21,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:21,261 INFO L124 PetriNetUnfolderBase]: 87/154 cut-off events. [2023-11-17 15:57:21,262 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-17 15:57:21,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 154 events. 87/154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 418 event pairs, 24 based on Foata normal form. 16/138 useless extension candidates. Maximal degree in co-relation 348. Up to 133 conditions per place. [2023-11-17 15:57:21,264 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 26 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-11-17 15:57:21,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 153 flow [2023-11-17 15:57:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:57:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:57:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-11-17 15:57:21,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789839944328464 [2023-11-17 15:57:21,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-11-17 15:57:21,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-11-17 15:57:21,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:21,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-11-17 15:57:21,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,270 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 658 transitions. [2023-11-17 15:57:21,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 153 flow [2023-11-17 15:57:21,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 150 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 15:57:21,272 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2023-11-17 15:57:21,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-17 15:57:21,273 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:57:21,273 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2023-11-17 15:57:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:21,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:57:21,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:21,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1414452377, now seen corresponding path program 1 times [2023-11-17 15:57:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353678837] [2023-11-17 15:57:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:21,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353678837] [2023-11-17 15:57:21,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353678837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:21,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:21,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 15:57:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507204457] [2023-11-17 15:57:21,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:57:21,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:21,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:21,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:21,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:21,823 INFO L124 PetriNetUnfolderBase]: 175/317 cut-off events. [2023-11-17 15:57:21,823 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-17 15:57:21,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 317 events. 175/317 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1107 event pairs, 34 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 259. Up to 76 conditions per place. [2023-11-17 15:57:21,825 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 70 selfloop transitions, 16 changer transitions 11/97 dead transitions. [2023-11-17 15:57:21,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 97 transitions, 461 flow [2023-11-17 15:57:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1801 transitions. [2023-11-17 15:57:21,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34181059024482824 [2023-11-17 15:57:21,833 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1801 transitions. [2023-11-17 15:57:21,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1801 transitions. [2023-11-17 15:57:21,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:21,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1801 transitions. [2023-11-17 15:57:21,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.72727272727272) internal successors, (1801), 11 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,845 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,846 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 11 states and 1801 transitions. [2023-11-17 15:57:21,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 97 transitions, 461 flow [2023-11-17 15:57:21,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 97 transitions, 435 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-17 15:57:21,848 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 183 flow [2023-11-17 15:57:21,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=183, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-11-17 15:57:21,848 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-17 15:57:21,849 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 183 flow [2023-11-17 15:57:21,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:21,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:57:21,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash 954213597, now seen corresponding path program 2 times [2023-11-17 15:57:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95677277] [2023-11-17 15:57:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:21,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:22,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95677277] [2023-11-17 15:57:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95677277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:22,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 15:57:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776355516] [2023-11-17 15:57:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:22,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:57:22,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:22,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:22,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:22,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:22,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:22,331 INFO L124 PetriNetUnfolderBase]: 385/705 cut-off events. [2023-11-17 15:57:22,331 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2023-11-17 15:57:22,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 705 events. 385/705 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3153 event pairs, 54 based on Foata normal form. 30/697 useless extension candidates. Maximal degree in co-relation 2136. Up to 154 conditions per place. [2023-11-17 15:57:22,335 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 92 selfloop transitions, 33 changer transitions 9/134 dead transitions. [2023-11-17 15:57:22,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 134 transitions, 834 flow [2023-11-17 15:57:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1815 transitions. [2023-11-17 15:57:22,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444676409185804 [2023-11-17 15:57:22,342 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1815 transitions. [2023-11-17 15:57:22,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1815 transitions. [2023-11-17 15:57:22,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:22,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1815 transitions. [2023-11-17 15:57:22,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 165.0) internal successors, (1815), 11 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) [2023-11-17 15:57:22,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:22,351 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:22,351 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 183 flow. Second operand 11 states and 1815 transitions. [2023-11-17 15:57:22,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 134 transitions, 834 flow [2023-11-17 15:57:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 134 transitions, 802 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-17 15:57:22,358 INFO L231 Difference]: Finished difference. Result has 56 places, 64 transitions, 475 flow [2023-11-17 15:57:22,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=475, PETRI_PLACES=56, PETRI_TRANSITIONS=64} [2023-11-17 15:57:22,359 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-17 15:57:22,360 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 64 transitions, 475 flow [2023-11-17 15:57:22,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:22,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:22,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:22,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:57:22,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:22,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1586080707, now seen corresponding path program 3 times [2023-11-17 15:57:22,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:22,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782788457] [2023-11-17 15:57:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:22,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:22,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782788457] [2023-11-17 15:57:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782788457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:22,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:22,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 15:57:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762529603] [2023-11-17 15:57:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:57:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:57:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-17 15:57:22,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:22,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 64 transitions, 475 flow. Second operand has 9 states, 9 states have (on average 156.66666666666666) internal successors, (1410), 9 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:22,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:22,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:22,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:23,005 INFO L124 PetriNetUnfolderBase]: 384/699 cut-off events. [2023-11-17 15:57:23,006 INFO L125 PetriNetUnfolderBase]: For 1809/1809 co-relation queries the response was YES. [2023-11-17 15:57:23,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 699 events. 384/699 cut-off events. For 1809/1809 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3084 event pairs, 82 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 2204. Up to 311 conditions per place. [2023-11-17 15:57:23,010 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 85 selfloop transitions, 30 changer transitions 7/122 dead transitions. [2023-11-17 15:57:23,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 122 transitions, 948 flow [2023-11-17 15:57:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:57:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:57:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1954 transitions. [2023-11-17 15:57:23,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399443284620738 [2023-11-17 15:57:23,015 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1954 transitions. [2023-11-17 15:57:23,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1954 transitions. [2023-11-17 15:57:23,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:23,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1954 transitions. [2023-11-17 15:57:23,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.83333333333334) internal successors, (1954), 12 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,024 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,024 INFO L175 Difference]: Start difference. First operand has 56 places, 64 transitions, 475 flow. Second operand 12 states and 1954 transitions. [2023-11-17 15:57:23,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 122 transitions, 948 flow [2023-11-17 15:57:23,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 900 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-17 15:57:23,033 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 575 flow [2023-11-17 15:57:23,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=575, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-17 15:57:23,035 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2023-11-17 15:57:23,035 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 575 flow [2023-11-17 15:57:23,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.66666666666666) internal successors, (1410), 9 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:23,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:57:23,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:23,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash -780051967, now seen corresponding path program 4 times [2023-11-17 15:57:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:23,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041014478] [2023-11-17 15:57:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:23,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041014478] [2023-11-17 15:57:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041014478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:23,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 15:57:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078646524] [2023-11-17 15:57:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:57:23,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:23,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:23,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:23,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:23,528 INFO L124 PetriNetUnfolderBase]: 345/665 cut-off events. [2023-11-17 15:57:23,528 INFO L125 PetriNetUnfolderBase]: For 1865/1865 co-relation queries the response was YES. [2023-11-17 15:57:23,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2520 conditions, 665 events. 345/665 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3093 event pairs, 78 based on Foata normal form. 38/663 useless extension candidates. Maximal degree in co-relation 2477. Up to 156 conditions per place. [2023-11-17 15:57:23,532 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 86 selfloop transitions, 33 changer transitions 11/130 dead transitions. [2023-11-17 15:57:23,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 130 transitions, 1071 flow [2023-11-17 15:57:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:57:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:57:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1649 transitions. [2023-11-17 15:57:23,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.344258872651357 [2023-11-17 15:57:23,536 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1649 transitions. [2023-11-17 15:57:23,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1649 transitions. [2023-11-17 15:57:23,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:23,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1649 transitions. [2023-11-17 15:57:23,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 164.9) internal successors, (1649), 10 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,545 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,545 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 575 flow. Second operand 10 states and 1649 transitions. [2023-11-17 15:57:23,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 130 transitions, 1071 flow [2023-11-17 15:57:23,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 130 transitions, 1006 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-11-17 15:57:23,553 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 684 flow [2023-11-17 15:57:23,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=684, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-11-17 15:57:23,554 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-17 15:57:23,554 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 684 flow [2023-11-17 15:57:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:23,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:23,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:57:23,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:23,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash -153075609, now seen corresponding path program 5 times [2023-11-17 15:57:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298242911] [2023-11-17 15:57:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:23,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:23,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298242911] [2023-11-17 15:57:23,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298242911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:23,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:23,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 15:57:23,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153733894] [2023-11-17 15:57:23,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:23,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:23,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:23,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:23,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:57:23,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:23,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 684 flow. Second operand has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:23,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:23,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:24,022 INFO L124 PetriNetUnfolderBase]: 348/670 cut-off events. [2023-11-17 15:57:24,022 INFO L125 PetriNetUnfolderBase]: For 3022/3022 co-relation queries the response was YES. [2023-11-17 15:57:24,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2755 conditions, 670 events. 348/670 cut-off events. For 3022/3022 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3118 event pairs, 74 based on Foata normal form. 2/628 useless extension candidates. Maximal degree in co-relation 2549. Up to 154 conditions per place. [2023-11-17 15:57:24,026 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 89 selfloop transitions, 35 changer transitions 6/130 dead transitions. [2023-11-17 15:57:24,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 1135 flow [2023-11-17 15:57:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1799 transitions. [2023-11-17 15:57:24,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414310115771494 [2023-11-17 15:57:24,030 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1799 transitions. [2023-11-17 15:57:24,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1799 transitions. [2023-11-17 15:57:24,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:24,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1799 transitions. [2023-11-17 15:57:24,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.54545454545453) internal successors, (1799), 11 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,038 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,039 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 684 flow. Second operand 11 states and 1799 transitions. [2023-11-17 15:57:24,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 1135 flow [2023-11-17 15:57:24,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1082 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-17 15:57:24,058 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 742 flow [2023-11-17 15:57:24,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=742, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-17 15:57:24,060 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2023-11-17 15:57:24,060 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 742 flow [2023-11-17 15:57:24,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:24,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:24,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:57:24,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:24,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -142966627, now seen corresponding path program 6 times [2023-11-17 15:57:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855718614] [2023-11-17 15:57:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:24,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:24,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855718614] [2023-11-17 15:57:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855718614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:24,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:24,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 15:57:24,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087382494] [2023-11-17 15:57:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:24,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:57:24,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:24,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 742 flow. Second operand has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:24,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:24,552 INFO L124 PetriNetUnfolderBase]: 353/677 cut-off events. [2023-11-17 15:57:24,552 INFO L125 PetriNetUnfolderBase]: For 2788/2788 co-relation queries the response was YES. [2023-11-17 15:57:24,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 677 events. 353/677 cut-off events. For 2788/2788 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3157 event pairs, 76 based on Foata normal form. 2/633 useless extension candidates. Maximal degree in co-relation 2699. Up to 154 conditions per place. [2023-11-17 15:57:24,556 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 91 selfloop transitions, 35 changer transitions 6/132 dead transitions. [2023-11-17 15:57:24,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 1184 flow [2023-11-17 15:57:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1803 transitions. [2023-11-17 15:57:24,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34219016891250714 [2023-11-17 15:57:24,561 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1803 transitions. [2023-11-17 15:57:24,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1803 transitions. [2023-11-17 15:57:24,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:24,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1803 transitions. [2023-11-17 15:57:24,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.9090909090909) internal successors, (1803), 11 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,569 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,569 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 742 flow. Second operand 11 states and 1803 transitions. [2023-11-17 15:57:24,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 1184 flow [2023-11-17 15:57:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 1104 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:24,578 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 756 flow [2023-11-17 15:57:24,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=756, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2023-11-17 15:57:24,578 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2023-11-17 15:57:24,579 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 756 flow [2023-11-17 15:57:24,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:24,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:24,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:57:24,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:24,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1240289150, now seen corresponding path program 1 times [2023-11-17 15:57:24,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941393869] [2023-11-17 15:57:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:24,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:24,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941393869] [2023-11-17 15:57:24,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941393869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:24,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060358015] [2023-11-17 15:57:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:24,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:24,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:24,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:24,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:57:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:24,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 15:57:24,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:25,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:25,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:57:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060358015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:25,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:25,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-17 15:57:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057579620] [2023-11-17 15:57:25,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:25,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:57:25,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:57:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:57:25,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:25,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 756 flow. Second operand has 26 states, 26 states have (on average 156.84615384615384) internal successors, (4078), 26 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:25,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:25,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:25,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:26,972 INFO L124 PetriNetUnfolderBase]: 629/1167 cut-off events. [2023-11-17 15:57:26,972 INFO L125 PetriNetUnfolderBase]: For 5145/5145 co-relation queries the response was YES. [2023-11-17 15:57:26,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4656 conditions, 1167 events. 629/1167 cut-off events. For 5145/5145 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6067 event pairs, 115 based on Foata normal form. 26/1112 useless extension candidates. Maximal degree in co-relation 4602. Up to 221 conditions per place. [2023-11-17 15:57:26,980 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 179 selfloop transitions, 68 changer transitions 20/267 dead transitions. [2023-11-17 15:57:26,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 267 transitions, 2286 flow [2023-11-17 15:57:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 15:57:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 15:57:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4720 transitions. [2023-11-17 15:57:26,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397883521704701 [2023-11-17 15:57:26,990 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4720 transitions. [2023-11-17 15:57:26,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4720 transitions. [2023-11-17 15:57:26,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:26,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4720 transitions. [2023-11-17 15:57:26,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 162.75862068965517) internal successors, (4720), 29 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,011 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,011 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 756 flow. Second operand 29 states and 4720 transitions. [2023-11-17 15:57:27,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 267 transitions, 2286 flow [2023-11-17 15:57:27,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 267 transitions, 2144 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-11-17 15:57:27,026 INFO L231 Difference]: Finished difference. Result has 114 places, 105 transitions, 1130 flow [2023-11-17 15:57:27,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1130, PETRI_PLACES=114, PETRI_TRANSITIONS=105} [2023-11-17 15:57:27,027 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2023-11-17 15:57:27,027 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 105 transitions, 1130 flow [2023-11-17 15:57:27,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 156.84615384615384) internal successors, (4078), 26 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:27,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:27,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:27,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 15:57:27,236 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:27,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2007295210, now seen corresponding path program 2 times [2023-11-17 15:57:27,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:27,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972920940] [2023-11-17 15:57:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:27,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:27,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972920940] [2023-11-17 15:57:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972920940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26134591] [2023-11-17 15:57:27,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:57:27,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:27,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:27,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:57:27,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:57:27,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:27,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 15:57:27,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:27,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:27,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-17 15:57:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:27,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:57:27,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26134591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:27,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:57:27,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-17 15:57:27,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483890987] [2023-11-17 15:57:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:27,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:57:27,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:57:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-17 15:57:27,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:27,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 105 transitions, 1130 flow. Second operand has 9 states, 9 states have (on average 156.77777777777777) internal successors, (1411), 9 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:27,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:27,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:27,952 INFO L124 PetriNetUnfolderBase]: 628/1161 cut-off events. [2023-11-17 15:57:27,952 INFO L125 PetriNetUnfolderBase]: For 6602/6602 co-relation queries the response was YES. [2023-11-17 15:57:27,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5042 conditions, 1161 events. 628/1161 cut-off events. For 6602/6602 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6007 event pairs, 117 based on Foata normal form. 1/1082 useless extension candidates. Maximal degree in co-relation 4970. Up to 558 conditions per place. [2023-11-17 15:57:27,962 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 82 selfloop transitions, 59 changer transitions 5/146 dead transitions. [2023-11-17 15:57:27,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 146 transitions, 1604 flow [2023-11-17 15:57:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:57:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:57:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1472 transitions. [2023-11-17 15:57:27,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414520992809093 [2023-11-17 15:57:27,964 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1472 transitions. [2023-11-17 15:57:27,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1472 transitions. [2023-11-17 15:57:27,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:27,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1472 transitions. [2023-11-17 15:57:27,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.55555555555554) internal successors, (1472), 9 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,971 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:27,971 INFO L175 Difference]: Start difference. First operand has 114 places, 105 transitions, 1130 flow. Second operand 9 states and 1472 transitions. [2023-11-17 15:57:27,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 146 transitions, 1604 flow [2023-11-17 15:57:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1373 flow, removed 39 selfloop flow, removed 17 redundant places. [2023-11-17 15:57:28,012 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 1049 flow [2023-11-17 15:57:28,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1049, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2023-11-17 15:57:28,012 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 78 predicate places. [2023-11-17 15:57:28,012 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 1049 flow [2023-11-17 15:57:28,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.77777777777777) internal successors, (1411), 9 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:28,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:28,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:28,218 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,SelfDestructingSolverStorable10 [2023-11-17 15:57:28,220 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:28,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -73242358, now seen corresponding path program 3 times [2023-11-17 15:57:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427596595] [2023-11-17 15:57:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:28,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:28,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427596595] [2023-11-17 15:57:28,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427596595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106121596] [2023-11-17 15:57:28,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:57:28,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:28,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:28,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:57:28,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:57:28,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:28,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 15:57:28,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:28,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:28,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 99 [2023-11-17 15:57:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:28,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:57:28,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106121596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:28,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:57:28,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-17 15:57:28,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284286696] [2023-11-17 15:57:28,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:28,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:57:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:57:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-17 15:57:28,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:28,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 1049 flow. Second operand has 9 states, 9 states have (on average 156.77777777777777) internal successors, (1411), 9 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:28,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:28,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:28,931 INFO L124 PetriNetUnfolderBase]: 602/1135 cut-off events. [2023-11-17 15:57:28,931 INFO L125 PetriNetUnfolderBase]: For 4568/4568 co-relation queries the response was YES. [2023-11-17 15:57:28,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4712 conditions, 1135 events. 602/1135 cut-off events. For 4568/4568 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5949 event pairs, 148 based on Foata normal form. 25/1082 useless extension candidates. Maximal degree in co-relation 4652. Up to 591 conditions per place. [2023-11-17 15:57:28,938 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 80 selfloop transitions, 56 changer transitions 12/148 dead transitions. [2023-11-17 15:57:28,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1521 flow [2023-11-17 15:57:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:57:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:57:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1473 transitions. [2023-11-17 15:57:28,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34168406402226864 [2023-11-17 15:57:28,940 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1473 transitions. [2023-11-17 15:57:28,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1473 transitions. [2023-11-17 15:57:28,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:28,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1473 transitions. [2023-11-17 15:57:28,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.66666666666666) internal successors, (1473), 9 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,945 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,945 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 1049 flow. Second operand 9 states and 1473 transitions. [2023-11-17 15:57:28,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1521 flow [2023-11-17 15:57:28,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1394 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:28,961 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 1107 flow [2023-11-17 15:57:28,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1107, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2023-11-17 15:57:28,962 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2023-11-17 15:57:28,962 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 1107 flow [2023-11-17 15:57:28,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.77777777777777) internal successors, (1411), 9 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:28,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:28,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:29,168 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:29,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1243288991, now seen corresponding path program 1 times [2023-11-17 15:57:29,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:29,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431717223] [2023-11-17 15:57:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431717223] [2023-11-17 15:57:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431717223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69986589] [2023-11-17 15:57:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:29,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:29,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:29,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:29,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 15:57:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:29,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 15:57:29,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:29,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:29,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:29,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:57:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:30,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69986589] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:30,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:30,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2023-11-17 15:57:30,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596630356] [2023-11-17 15:57:30,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:30,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:57:30,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:30,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:57:30,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:57:30,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:30,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 1107 flow. Second operand has 9 states, 9 states have (on average 156.77777777777777) internal successors, (1411), 9 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:30,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:30,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:30,420 INFO L124 PetriNetUnfolderBase]: 587/1115 cut-off events. [2023-11-17 15:57:30,421 INFO L125 PetriNetUnfolderBase]: For 4827/4827 co-relation queries the response was YES. [2023-11-17 15:57:30,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4842 conditions, 1115 events. 587/1115 cut-off events. For 4827/4827 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5907 event pairs, 125 based on Foata normal form. 2/1039 useless extension candidates. Maximal degree in co-relation 4779. Up to 303 conditions per place. [2023-11-17 15:57:30,428 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 95 selfloop transitions, 52 changer transitions 13/160 dead transitions. [2023-11-17 15:57:30,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1606 flow [2023-11-17 15:57:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1797 transitions. [2023-11-17 15:57:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410514329094705 [2023-11-17 15:57:30,431 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1797 transitions. [2023-11-17 15:57:30,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1797 transitions. [2023-11-17 15:57:30,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:30,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1797 transitions. [2023-11-17 15:57:30,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.36363636363637) internal successors, (1797), 11 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,437 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,437 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 1107 flow. Second operand 11 states and 1797 transitions. [2023-11-17 15:57:30,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1606 flow [2023-11-17 15:57:30,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 160 transitions, 1496 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:30,457 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 1093 flow [2023-11-17 15:57:30,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1093, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2023-11-17 15:57:30,458 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2023-11-17 15:57:30,459 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 1093 flow [2023-11-17 15:57:30,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.77777777777777) internal successors, (1411), 9 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:30,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:30,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:30,667 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:30,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:30,667 INFO L85 PathProgramCache]: Analyzing trace with hash 182907473, now seen corresponding path program 2 times [2023-11-17 15:57:30,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:30,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655016862] [2023-11-17 15:57:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:30,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655016862] [2023-11-17 15:57:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655016862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982766944] [2023-11-17 15:57:30,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:57:30,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:30,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:30,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 15:57:30,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:57:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:30,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 15:57:30,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:31,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:57:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982766944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:57:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-17 15:57:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000796396] [2023-11-17 15:57:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-17 15:57:31,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:31,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 1093 flow. Second operand has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:31,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:31,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:31,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:31,318 INFO L124 PetriNetUnfolderBase]: 569/1065 cut-off events. [2023-11-17 15:57:31,319 INFO L125 PetriNetUnfolderBase]: For 4433/4433 co-relation queries the response was YES. [2023-11-17 15:57:31,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 1065 events. 569/1065 cut-off events. For 4433/4433 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5433 event pairs, 107 based on Foata normal form. 2/989 useless extension candidates. Maximal degree in co-relation 4465. Up to 464 conditions per place. [2023-11-17 15:57:31,325 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 90 selfloop transitions, 49 changer transitions 4/143 dead transitions. [2023-11-17 15:57:31,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 143 transitions, 1505 flow [2023-11-17 15:57:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:57:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:57:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1472 transitions. [2023-11-17 15:57:31,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414520992809093 [2023-11-17 15:57:31,327 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1472 transitions. [2023-11-17 15:57:31,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1472 transitions. [2023-11-17 15:57:31,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:31,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1472 transitions. [2023-11-17 15:57:31,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.55555555555554) internal successors, (1472), 9 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:31,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:31,331 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:31,331 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 1093 flow. Second operand 9 states and 1472 transitions. [2023-11-17 15:57:31,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 143 transitions, 1505 flow [2023-11-17 15:57:31,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1393 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-11-17 15:57:31,348 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 1091 flow [2023-11-17 15:57:31,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1091, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2023-11-17 15:57:31,349 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 81 predicate places. [2023-11-17 15:57:31,349 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 1091 flow [2023-11-17 15:57:31,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:31,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:31,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:31,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 15:57:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 15:57:31,556 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:31,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash 558624752, now seen corresponding path program 4 times [2023-11-17 15:57:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183935630] [2023-11-17 15:57:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183935630] [2023-11-17 15:57:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183935630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848061033] [2023-11-17 15:57:31,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:57:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:31,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:31,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 15:57:31,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:57:31,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:31,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 15:57:31,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:32,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:32,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-17 15:57:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:32,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:32,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:32,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:57:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:32,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848061033] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:32,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:32,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-17 15:57:32,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94676248] [2023-11-17 15:57:32,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:57:32,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:32,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 1091 flow. Second operand has 10 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:32,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:32,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:32,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:33,051 INFO L124 PetriNetUnfolderBase]: 570/1069 cut-off events. [2023-11-17 15:57:33,051 INFO L125 PetriNetUnfolderBase]: For 4324/4324 co-relation queries the response was YES. [2023-11-17 15:57:33,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 1069 events. 570/1069 cut-off events. For 4324/4324 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5481 event pairs, 140 based on Foata normal form. 5/994 useless extension candidates. Maximal degree in co-relation 4237. Up to 316 conditions per place. [2023-11-17 15:57:33,058 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 95 selfloop transitions, 60 changer transitions 5/160 dead transitions. [2023-11-17 15:57:33,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 160 transitions, 1598 flow [2023-11-17 15:57:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:57:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:57:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1956 transitions. [2023-11-17 15:57:33,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34029227557411273 [2023-11-17 15:57:33,060 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1956 transitions. [2023-11-17 15:57:33,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1956 transitions. [2023-11-17 15:57:33,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:33,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1956 transitions. [2023-11-17 15:57:33,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:33,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:33,066 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:33,066 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 1091 flow. Second operand 12 states and 1956 transitions. [2023-11-17 15:57:33,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 160 transitions, 1598 flow [2023-11-17 15:57:33,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 160 transitions, 1465 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-11-17 15:57:33,082 INFO L231 Difference]: Finished difference. Result has 111 places, 108 transitions, 1158 flow [2023-11-17 15:57:33,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1158, PETRI_PLACES=111, PETRI_TRANSITIONS=108} [2023-11-17 15:57:33,082 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2023-11-17 15:57:33,082 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 108 transitions, 1158 flow [2023-11-17 15:57:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:33,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:33,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:33,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 15:57:33,288 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:33,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash 548515770, now seen corresponding path program 5 times [2023-11-17 15:57:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:33,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425209169] [2023-11-17 15:57:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425209169] [2023-11-17 15:57:33,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425209169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852157751] [2023-11-17 15:57:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:57:33,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:33,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:33,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 15:57:33,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:33,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 15:57:33,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:33,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:33,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:33,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:57:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:34,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852157751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:34,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:34,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-17 15:57:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549779609] [2023-11-17 15:57:34,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:57:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:57:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:57:34,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:57:34,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 1158 flow. Second operand has 26 states, 26 states have (on average 156.84615384615384) internal successors, (4078), 26 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:34,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:34,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:57:34,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:35,250 INFO L124 PetriNetUnfolderBase]: 589/1113 cut-off events. [2023-11-17 15:57:35,250 INFO L125 PetriNetUnfolderBase]: For 4985/4985 co-relation queries the response was YES. [2023-11-17 15:57:35,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4644 conditions, 1113 events. 589/1113 cut-off events. For 4985/4985 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5846 event pairs, 140 based on Foata normal form. 2/1029 useless extension candidates. Maximal degree in co-relation 4591. Up to 185 conditions per place. [2023-11-17 15:57:35,257 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 187 selfloop transitions, 69 changer transitions 10/266 dead transitions. [2023-11-17 15:57:35,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 266 transitions, 2311 flow [2023-11-17 15:57:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 15:57:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 15:57:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4867 transitions. [2023-11-17 15:57:35,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33869171885873345 [2023-11-17 15:57:35,261 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4867 transitions. [2023-11-17 15:57:35,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4867 transitions. [2023-11-17 15:57:35,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:35,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4867 transitions. [2023-11-17 15:57:35,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 162.23333333333332) internal successors, (4867), 30 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:35,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 479.0) internal successors, (14849), 31 states have internal predecessors, (14849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:35,276 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 479.0) internal successors, (14849), 31 states have internal predecessors, (14849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:35,276 INFO L175 Difference]: Start difference. First operand has 111 places, 108 transitions, 1158 flow. Second operand 30 states and 4867 transitions. [2023-11-17 15:57:35,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 266 transitions, 2311 flow [2023-11-17 15:57:35,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 266 transitions, 2217 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-17 15:57:35,297 INFO L231 Difference]: Finished difference. Result has 135 places, 112 transitions, 1261 flow [2023-11-17 15:57:35,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1261, PETRI_PLACES=135, PETRI_TRANSITIONS=112} [2023-11-17 15:57:35,298 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 110 predicate places. [2023-11-17 15:57:35,298 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 112 transitions, 1261 flow [2023-11-17 15:57:35,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 156.84615384615384) internal successors, (4078), 26 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:35,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:35,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:35,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:35,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:35,507 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:35,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1715580094, now seen corresponding path program 1 times [2023-11-17 15:57:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:35,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095570911] [2023-11-17 15:57:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:35,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095570911] [2023-11-17 15:57:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095570911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138374024] [2023-11-17 15:57:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:35,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:35,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:35,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:35,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 15:57:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:35,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 15:57:35,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:35,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138374024] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:35,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:35,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-11-17 15:57:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924028807] [2023-11-17 15:57:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:35,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:57:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:57:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:57:35,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 479 [2023-11-17 15:57:35,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 112 transitions, 1261 flow. Second operand has 7 states, 7 states have (on average 174.42857142857142) internal successors, (1221), 7 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:35,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:35,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 479 [2023-11-17 15:57:35,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:36,013 INFO L124 PetriNetUnfolderBase]: 609/1139 cut-off events. [2023-11-17 15:57:36,013 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2023-11-17 15:57:36,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4949 conditions, 1139 events. 609/1139 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6051 event pairs, 118 based on Foata normal form. 16/1069 useless extension candidates. Maximal degree in co-relation 4888. Up to 252 conditions per place. [2023-11-17 15:57:36,020 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 121 selfloop transitions, 47 changer transitions 0/168 dead transitions. [2023-11-17 15:57:36,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1981 flow [2023-11-17 15:57:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:57:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:57:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1627 transitions. [2023-11-17 15:57:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37740663419160286 [2023-11-17 15:57:36,022 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1627 transitions. [2023-11-17 15:57:36,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1627 transitions. [2023-11-17 15:57:36,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:36,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1627 transitions. [2023-11-17 15:57:36,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.77777777777777) internal successors, (1627), 9 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,041 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,041 INFO L175 Difference]: Start difference. First operand has 135 places, 112 transitions, 1261 flow. Second operand 9 states and 1627 transitions. [2023-11-17 15:57:36,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1981 flow [2023-11-17 15:57:36,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 1772 flow, removed 20 selfloop flow, removed 21 redundant places. [2023-11-17 15:57:36,056 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1213 flow [2023-11-17 15:57:36,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1213, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-11-17 15:57:36,056 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2023-11-17 15:57:36,056 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1213 flow [2023-11-17 15:57:36,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.42857142857142) internal successors, (1221), 7 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:36,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:36,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:36,268 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,SelfDestructingSolverStorable16 [2023-11-17 15:57:36,268 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:36,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:36,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1711123509, now seen corresponding path program 1 times [2023-11-17 15:57:36,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:36,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377536507] [2023-11-17 15:57:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:36,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:36,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:36,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377536507] [2023-11-17 15:57:36,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377536507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:36,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:36,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:57:36,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676645792] [2023-11-17 15:57:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:36,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:57:36,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:36,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:57:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:57:36,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 479 [2023-11-17 15:57:36,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1213 flow. Second operand has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:36,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 479 [2023-11-17 15:57:36,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:36,429 INFO L124 PetriNetUnfolderBase]: 384/740 cut-off events. [2023-11-17 15:57:36,430 INFO L125 PetriNetUnfolderBase]: For 3020/3020 co-relation queries the response was YES. [2023-11-17 15:57:36,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3322 conditions, 740 events. 384/740 cut-off events. For 3020/3020 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3453 event pairs, 219 based on Foata normal form. 42/782 useless extension candidates. Maximal degree in co-relation 3118. Up to 637 conditions per place. [2023-11-17 15:57:36,433 INFO L140 encePairwiseOnDemand]: 474/479 looper letters, 72 selfloop transitions, 2 changer transitions 33/107 dead transitions. [2023-11-17 15:57:36,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 107 transitions, 1181 flow [2023-11-17 15:57:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:57:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:57:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 915 transitions. [2023-11-17 15:57:36,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38204592901878914 [2023-11-17 15:57:36,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 915 transitions. [2023-11-17 15:57:36,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 915 transitions. [2023-11-17 15:57:36,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:36,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 915 transitions. [2023-11-17 15:57:36,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,444 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,444 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1213 flow. Second operand 5 states and 915 transitions. [2023-11-17 15:57:36,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 107 transitions, 1181 flow [2023-11-17 15:57:36,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 1109 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-11-17 15:57:36,455 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 603 flow [2023-11-17 15:57:36,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=603, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2023-11-17 15:57:36,455 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2023-11-17 15:57:36,455 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 603 flow [2023-11-17 15:57:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:36,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:36,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:36,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 15:57:36,457 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:36,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:36,457 INFO L85 PathProgramCache]: Analyzing trace with hash 747242498, now seen corresponding path program 1 times [2023-11-17 15:57:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:36,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012272297] [2023-11-17 15:57:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:36,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:36,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:36,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012272297] [2023-11-17 15:57:36,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012272297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:36,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332565896] [2023-11-17 15:57:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:36,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:36,787 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:36,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 15:57:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:36,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 15:57:36,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:36,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:57:36,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:37,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:37,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:37,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-17 15:57:37,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 274 [2023-11-17 15:57:37,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-11-17 15:57:37,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-11-17 15:57:37,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-17 15:57:37,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2023-11-17 15:57:37,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-11-17 15:57:37,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:37,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-11-17 15:57:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:37,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332565896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:37,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:37,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-11-17 15:57:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520391610] [2023-11-17 15:57:37,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:37,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:57:37,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:57:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=504, Unknown=11, NotChecked=0, Total=650 [2023-11-17 15:57:37,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 479 [2023-11-17 15:57:37,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 603 flow. Second operand has 26 states, 26 states have (on average 138.53846153846155) internal successors, (3602), 26 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:37,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:37,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 479 [2023-11-17 15:57:37,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:38,567 INFO L124 PetriNetUnfolderBase]: 633/1091 cut-off events. [2023-11-17 15:57:38,567 INFO L125 PetriNetUnfolderBase]: For 3723/3723 co-relation queries the response was YES. [2023-11-17 15:57:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4614 conditions, 1091 events. 633/1091 cut-off events. For 3723/3723 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5072 event pairs, 205 based on Foata normal form. 24/1115 useless extension candidates. Maximal degree in co-relation 4587. Up to 311 conditions per place. [2023-11-17 15:57:38,572 INFO L140 encePairwiseOnDemand]: 465/479 looper letters, 117 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2023-11-17 15:57:38,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 140 transitions, 1257 flow [2023-11-17 15:57:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:57:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:57:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1732 transitions. [2023-11-17 15:57:38,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3013221990257481 [2023-11-17 15:57:38,574 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1732 transitions. [2023-11-17 15:57:38,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1732 transitions. [2023-11-17 15:57:38,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:38,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1732 transitions. [2023-11-17 15:57:38,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.33333333333334) internal successors, (1732), 12 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,579 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,579 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 603 flow. Second operand 12 states and 1732 transitions. [2023-11-17 15:57:38,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 140 transitions, 1257 flow [2023-11-17 15:57:38,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 1156 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-11-17 15:57:38,589 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 694 flow [2023-11-17 15:57:38,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=694, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-11-17 15:57:38,589 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-11-17 15:57:38,589 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 694 flow [2023-11-17 15:57:38,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 138.53846153846155) internal successors, (3602), 26 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:38,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:38,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 15:57:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:38,795 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:38,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1238397294, now seen corresponding path program 1 times [2023-11-17 15:57:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517822950] [2023-11-17 15:57:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517822950] [2023-11-17 15:57:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517822950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:38,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:57:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 15:57:38,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309161185] [2023-11-17 15:57:38,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:38,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:57:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:57:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:57:38,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 479 [2023-11-17 15:57:38,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 694 flow. Second operand has 5 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:38,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 479 [2023-11-17 15:57:38,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:38,945 INFO L124 PetriNetUnfolderBase]: 488/846 cut-off events. [2023-11-17 15:57:38,946 INFO L125 PetriNetUnfolderBase]: For 3180/3180 co-relation queries the response was YES. [2023-11-17 15:57:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 846 events. 488/846 cut-off events. For 3180/3180 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3603 event pairs, 236 based on Foata normal form. 28/874 useless extension candidates. Maximal degree in co-relation 4072. Up to 779 conditions per place. [2023-11-17 15:57:38,950 INFO L140 encePairwiseOnDemand]: 474/479 looper letters, 46 selfloop transitions, 4 changer transitions 25/75 dead transitions. [2023-11-17 15:57:38,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 75 transitions, 725 flow [2023-11-17 15:57:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:57:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:57:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 913 transitions. [2023-11-17 15:57:38,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812108559498956 [2023-11-17 15:57:38,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 913 transitions. [2023-11-17 15:57:38,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 913 transitions. [2023-11-17 15:57:38,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:38,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 913 transitions. [2023-11-17 15:57:38,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,954 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 694 flow. Second operand 5 states and 913 transitions. [2023-11-17 15:57:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 75 transitions, 725 flow [2023-11-17 15:57:38,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 664 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-11-17 15:57:38,963 INFO L231 Difference]: Finished difference. Result has 84 places, 50 transitions, 333 flow [2023-11-17 15:57:38,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=84, PETRI_TRANSITIONS=50} [2023-11-17 15:57:38,964 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 59 predicate places. [2023-11-17 15:57:38,964 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 50 transitions, 333 flow [2023-11-17 15:57:38,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:38,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:38,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-17 15:57:38,965 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:38,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash -742162498, now seen corresponding path program 2 times [2023-11-17 15:57:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533735680] [2023-11-17 15:57:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:39,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:39,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533735680] [2023-11-17 15:57:39,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533735680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:39,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009909256] [2023-11-17 15:57:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:57:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:39,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:39,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 15:57:39,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:39,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:39,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:39,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:39,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:39,600 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:39,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:39,632 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 15:57:39,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 15:57:39,647 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:39,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2023-11-17 15:57:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:39,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009909256] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:39,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:39,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2023-11-17 15:57:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14375210] [2023-11-17 15:57:39,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:39,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:57:39,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 479 [2023-11-17 15:57:39,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 50 transitions, 333 flow. Second operand has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:39,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:39,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 479 [2023-11-17 15:57:39,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:40,063 INFO L124 PetriNetUnfolderBase]: 520/860 cut-off events. [2023-11-17 15:57:40,063 INFO L125 PetriNetUnfolderBase]: For 1988/1988 co-relation queries the response was YES. [2023-11-17 15:57:40,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3753 conditions, 860 events. 520/860 cut-off events. For 1988/1988 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3595 event pairs, 182 based on Foata normal form. 24/884 useless extension candidates. Maximal degree in co-relation 3731. Up to 612 conditions per place. [2023-11-17 15:57:40,067 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 60 selfloop transitions, 23 changer transitions 0/83 dead transitions. [2023-11-17 15:57:40,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 708 flow [2023-11-17 15:57:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:57:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:57:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1560 transitions. [2023-11-17 15:57:40,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325678496868476 [2023-11-17 15:57:40,069 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1560 transitions. [2023-11-17 15:57:40,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1560 transitions. [2023-11-17 15:57:40,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:40,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1560 transitions. [2023-11-17 15:57:40,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,074 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,074 INFO L175 Difference]: Start difference. First operand has 84 places, 50 transitions, 333 flow. Second operand 10 states and 1560 transitions. [2023-11-17 15:57:40,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 708 flow [2023-11-17 15:57:40,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 653 flow, removed 19 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:40,080 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 426 flow [2023-11-17 15:57:40,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-11-17 15:57:40,081 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-17 15:57:40,081 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 426 flow [2023-11-17 15:57:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:40,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:40,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-17 15:57:40,286 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,SelfDestructingSolverStorable20 [2023-11-17 15:57:40,286 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:40,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1003114378, now seen corresponding path program 3 times [2023-11-17 15:57:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732557299] [2023-11-17 15:57:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732557299] [2023-11-17 15:57:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732557299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434225848] [2023-11-17 15:57:40,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:57:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:40,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:40,638 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:40,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 15:57:40,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:57:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:40,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:40,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:40,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:40,957 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:40,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:40,962 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:40,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:40,993 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:57:40,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 15:57:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434225848] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:41,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:41,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2023-11-17 15:57:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762033908] [2023-11-17 15:57:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:57:41,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 479 [2023-11-17 15:57:41,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 426 flow. Second operand has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:41,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:41,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 479 [2023-11-17 15:57:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:41,357 INFO L124 PetriNetUnfolderBase]: 616/1000 cut-off events. [2023-11-17 15:57:41,357 INFO L125 PetriNetUnfolderBase]: For 2648/2648 co-relation queries the response was YES. [2023-11-17 15:57:41,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4656 conditions, 1000 events. 616/1000 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4258 event pairs, 172 based on Foata normal form. 24/1024 useless extension candidates. Maximal degree in co-relation 4636. Up to 686 conditions per place. [2023-11-17 15:57:41,362 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 62 selfloop transitions, 32 changer transitions 0/94 dead transitions. [2023-11-17 15:57:41,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 887 flow [2023-11-17 15:57:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:57:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:57:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1560 transitions. [2023-11-17 15:57:41,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325678496868476 [2023-11-17 15:57:41,376 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1560 transitions. [2023-11-17 15:57:41,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1560 transitions. [2023-11-17 15:57:41,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:41,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1560 transitions. [2023-11-17 15:57:41,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:41,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:41,381 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:41,381 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 426 flow. Second operand 10 states and 1560 transitions. [2023-11-17 15:57:41,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 887 flow [2023-11-17 15:57:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 821 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:41,386 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 643 flow [2023-11-17 15:57:41,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=643, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-11-17 15:57:41,387 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-11-17 15:57:41,387 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 643 flow [2023-11-17 15:57:41,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:41,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:41,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:41,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 15:57:41,595 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,SelfDestructingSolverStorable21 [2023-11-17 15:57:41,595 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:41,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash -194238514, now seen corresponding path program 4 times [2023-11-17 15:57:41,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:41,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002203434] [2023-11-17 15:57:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:41,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:41,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002203434] [2023-11-17 15:57:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002203434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810190920] [2023-11-17 15:57:41,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:57:41,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:41,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:41,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 15:57:41,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:57:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:41,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 15:57:41,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:57:42,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:57:42,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810190920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:42,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:57:42,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-11-17 15:57:42,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475637564] [2023-11-17 15:57:42,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:42,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:57:42,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:57:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-17 15:57:42,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 479 [2023-11-17 15:57:42,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 643 flow. Second operand has 8 states, 8 states have (on average 168.375) internal successors, (1347), 8 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:42,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:42,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 479 [2023-11-17 15:57:42,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:42,258 INFO L124 PetriNetUnfolderBase]: 636/1044 cut-off events. [2023-11-17 15:57:42,259 INFO L125 PetriNetUnfolderBase]: For 3858/3858 co-relation queries the response was YES. [2023-11-17 15:57:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5291 conditions, 1044 events. 636/1044 cut-off events. For 3858/3858 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4604 event pairs, 166 based on Foata normal form. 4/1048 useless extension candidates. Maximal degree in co-relation 5268. Up to 735 conditions per place. [2023-11-17 15:57:42,264 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 61 selfloop transitions, 31 changer transitions 0/92 dead transitions. [2023-11-17 15:57:42,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 959 flow [2023-11-17 15:57:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:57:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:57:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1379 transitions. [2023-11-17 15:57:42,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598643006263048 [2023-11-17 15:57:42,266 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1379 transitions. [2023-11-17 15:57:42,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1379 transitions. [2023-11-17 15:57:42,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:42,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1379 transitions. [2023-11-17 15:57:42,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.375) internal successors, (1379), 8 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) [2023-11-17 15:57:42,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:42,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:42,269 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 643 flow. Second operand 8 states and 1379 transitions. [2023-11-17 15:57:42,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 959 flow [2023-11-17 15:57:42,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 905 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-11-17 15:57:42,278 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 718 flow [2023-11-17 15:57:42,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=718, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-11-17 15:57:42,279 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 51 predicate places. [2023-11-17 15:57:42,279 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 718 flow [2023-11-17 15:57:42,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 168.375) internal successors, (1347), 8 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:42,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:42,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:42,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:42,484 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,SelfDestructingSolverStorable22 [2023-11-17 15:57:42,484 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:42,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:42,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1894701034, now seen corresponding path program 5 times [2023-11-17 15:57:42,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:42,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678441711] [2023-11-17 15:57:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:42,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:42,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678441711] [2023-11-17 15:57:42,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678441711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111247437] [2023-11-17 15:57:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:57:42,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:42,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:42,765 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:42,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 15:57:42,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:42,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 15:57:42,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:42,865 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 15:57:42,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 15:57:42,876 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 15:57:42,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 15:57:42,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:57:42,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2023-11-17 15:57:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:57:42,946 INFO L349 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2023-11-17 15:57:42,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2023-11-17 15:57:42,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:57:43,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:43,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:43,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:57:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111247437] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:43,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2023-11-17 15:57:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785490046] [2023-11-17 15:57:43,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:43,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:57:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:57:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:57:43,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 15:57:43,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 718 flow. Second operand has 6 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:43,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:43,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 15:57:43,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:43,582 INFO L124 PetriNetUnfolderBase]: 872/1408 cut-off events. [2023-11-17 15:57:43,583 INFO L125 PetriNetUnfolderBase]: For 5257/5257 co-relation queries the response was YES. [2023-11-17 15:57:43,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7433 conditions, 1408 events. 872/1408 cut-off events. For 5257/5257 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6608 event pairs, 198 based on Foata normal form. 4/1412 useless extension candidates. Maximal degree in co-relation 7408. Up to 1101 conditions per place. [2023-11-17 15:57:43,591 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 101 selfloop transitions, 37 changer transitions 0/138 dead transitions. [2023-11-17 15:57:43,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 138 transitions, 1619 flow [2023-11-17 15:57:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:57:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:57:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1452 transitions. [2023-11-17 15:57:43,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37891440501043844 [2023-11-17 15:57:43,593 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1452 transitions. [2023-11-17 15:57:43,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1452 transitions. [2023-11-17 15:57:43,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:43,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1452 transitions. [2023-11-17 15:57:43,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 181.5) internal successors, (1452), 8 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:43,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:43,596 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:43,596 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 718 flow. Second operand 8 states and 1452 transitions. [2023-11-17 15:57:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 138 transitions, 1619 flow [2023-11-17 15:57:43,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 138 transitions, 1545 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 15:57:43,608 INFO L231 Difference]: Finished difference. Result has 85 places, 111 transitions, 1212 flow [2023-11-17 15:57:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1212, PETRI_PLACES=85, PETRI_TRANSITIONS=111} [2023-11-17 15:57:43,608 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-11-17 15:57:43,608 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 111 transitions, 1212 flow [2023-11-17 15:57:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:43,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:43,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:43,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:43,813 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,SelfDestructingSolverStorable23 [2023-11-17 15:57:43,814 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2004218484, now seen corresponding path program 6 times [2023-11-17 15:57:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:43,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695676800] [2023-11-17 15:57:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695676800] [2023-11-17 15:57:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695676800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058022328] [2023-11-17 15:57:44,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:57:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:44,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:44,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 15:57:44,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 15:57:44,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:44,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:44,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:44,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:44,431 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:44,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:44,437 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:44,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:44,471 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:57:44,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 15:57:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:44,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058022328] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:44,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:44,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-11-17 15:57:44,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801668018] [2023-11-17 15:57:44,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:44,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:57:44,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 479 [2023-11-17 15:57:44,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 1212 flow. Second operand has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:44,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:44,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 479 [2023-11-17 15:57:44,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:44,861 INFO L124 PetriNetUnfolderBase]: 870/1410 cut-off events. [2023-11-17 15:57:44,861 INFO L125 PetriNetUnfolderBase]: For 6665/6665 co-relation queries the response was YES. [2023-11-17 15:57:44,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7947 conditions, 1410 events. 870/1410 cut-off events. For 6665/6665 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6707 event pairs, 222 based on Foata normal form. 8/1418 useless extension candidates. Maximal degree in co-relation 7916. Up to 880 conditions per place. [2023-11-17 15:57:44,869 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 72 selfloop transitions, 51 changer transitions 0/123 dead transitions. [2023-11-17 15:57:44,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1529 flow [2023-11-17 15:57:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:57:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:57:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1552 transitions. [2023-11-17 15:57:44,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32400835073068895 [2023-11-17 15:57:44,871 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1552 transitions. [2023-11-17 15:57:44,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1552 transitions. [2023-11-17 15:57:44,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:44,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1552 transitions. [2023-11-17 15:57:44,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:44,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:44,875 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:44,875 INFO L175 Difference]: Start difference. First operand has 85 places, 111 transitions, 1212 flow. Second operand 10 states and 1552 transitions. [2023-11-17 15:57:44,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1529 flow [2023-11-17 15:57:44,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 1513 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-17 15:57:44,890 INFO L231 Difference]: Finished difference. Result has 95 places, 112 transitions, 1316 flow [2023-11-17 15:57:44,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1316, PETRI_PLACES=95, PETRI_TRANSITIONS=112} [2023-11-17 15:57:44,890 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 70 predicate places. [2023-11-17 15:57:44,890 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 112 transitions, 1316 flow [2023-11-17 15:57:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:44,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:44,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:44,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:45,096 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:45,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -352600016, now seen corresponding path program 7 times [2023-11-17 15:57:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144859151] [2023-11-17 15:57:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:45,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:45,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144859151] [2023-11-17 15:57:45,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144859151] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:45,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663748423] [2023-11-17 15:57:45,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:57:45,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:45,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:45,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:45,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 15:57:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:45,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 15:57:45,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:45,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:57:45,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:45,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:45,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:45,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:45,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-17 15:57:45,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:45,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2023-11-17 15:57:45,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:45,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-11-17 15:57:45,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:45,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-11-17 15:57:46,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:46,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-17 15:57:46,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:46,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 274 [2023-11-17 15:57:46,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:46,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-11-17 15:57:46,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:46,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-11-17 15:57:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663748423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:46,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:46,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2023-11-17 15:57:46,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536316930] [2023-11-17 15:57:46,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:46,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:57:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:57:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=589, Unknown=28, NotChecked=0, Total=756 [2023-11-17 15:57:46,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 479 [2023-11-17 15:57:46,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 112 transitions, 1316 flow. Second operand has 28 states, 28 states have (on average 138.5) internal successors, (3878), 28 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:46,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:46,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 479 [2023-11-17 15:57:46,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:46,817 INFO L124 PetriNetUnfolderBase]: 930/1496 cut-off events. [2023-11-17 15:57:46,818 INFO L125 PetriNetUnfolderBase]: For 7273/7273 co-relation queries the response was YES. [2023-11-17 15:57:46,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8621 conditions, 1496 events. 930/1496 cut-off events. For 7273/7273 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7123 event pairs, 232 based on Foata normal form. 4/1500 useless extension candidates. Maximal degree in co-relation 8588. Up to 839 conditions per place. [2023-11-17 15:57:46,825 INFO L140 encePairwiseOnDemand]: 464/479 looper letters, 63 selfloop transitions, 79 changer transitions 0/142 dead transitions. [2023-11-17 15:57:46,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1841 flow [2023-11-17 15:57:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:57:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:57:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1845 transitions. [2023-11-17 15:57:46,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962903484824153 [2023-11-17 15:57:46,828 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1845 transitions. [2023-11-17 15:57:46,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1845 transitions. [2023-11-17 15:57:46,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:46,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1845 transitions. [2023-11-17 15:57:46,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.92307692307693) internal successors, (1845), 13 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:46,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 479.0) internal successors, (6706), 14 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:46,833 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 479.0) internal successors, (6706), 14 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:46,833 INFO L175 Difference]: Start difference. First operand has 95 places, 112 transitions, 1316 flow. Second operand 13 states and 1845 transitions. [2023-11-17 15:57:46,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1841 flow [2023-11-17 15:57:46,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1763 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:46,848 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 1520 flow [2023-11-17 15:57:46,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1520, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2023-11-17 15:57:46,849 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2023-11-17 15:57:46,849 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 1520 flow [2023-11-17 15:57:46,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 138.5) internal successors, (3878), 28 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:46,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:46,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:46,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:47,054 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,SelfDestructingSolverStorable25 [2023-11-17 15:57:47,054 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:47,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash -743665408, now seen corresponding path program 8 times [2023-11-17 15:57:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:47,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067250900] [2023-11-17 15:57:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:47,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:47,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067250900] [2023-11-17 15:57:47,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067250900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:47,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332848099] [2023-11-17 15:57:47,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:57:47,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:47,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:47,313 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:47,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 15:57:47,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:47,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:47,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:47,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:47,646 INFO L349 Elim1Store]: treesize reduction 11, result has 84.1 percent of original size [2023-11-17 15:57:47,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 76 [2023-11-17 15:57:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332848099] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:47,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:47,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-11-17 15:57:47,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106831575] [2023-11-17 15:57:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:47,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:47,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:57:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 479 [2023-11-17 15:57:47,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 1520 flow. Second operand has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:47,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:47,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 479 [2023-11-17 15:57:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:48,076 INFO L124 PetriNetUnfolderBase]: 1178/1912 cut-off events. [2023-11-17 15:57:48,077 INFO L125 PetriNetUnfolderBase]: For 12931/12931 co-relation queries the response was YES. [2023-11-17 15:57:48,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11699 conditions, 1912 events. 1178/1912 cut-off events. For 12931/12931 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9573 event pairs, 242 based on Foata normal form. 4/1916 useless extension candidates. Maximal degree in co-relation 11665. Up to 1080 conditions per place. [2023-11-17 15:57:48,086 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 132 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2023-11-17 15:57:48,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 2428 flow [2023-11-17 15:57:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:57:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:57:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1556 transitions. [2023-11-17 15:57:48,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248434237995825 [2023-11-17 15:57:48,088 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1556 transitions. [2023-11-17 15:57:48,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1556 transitions. [2023-11-17 15:57:48,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:48,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1556 transitions. [2023-11-17 15:57:48,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.6) internal successors, (1556), 10 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:48,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:48,092 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:48,092 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 1520 flow. Second operand 10 states and 1556 transitions. [2023-11-17 15:57:48,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 2428 flow [2023-11-17 15:57:48,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 2279 flow, removed 19 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:48,114 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1692 flow [2023-11-17 15:57:48,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1692, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2023-11-17 15:57:48,114 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 81 predicate places. [2023-11-17 15:57:48,114 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1692 flow [2023-11-17 15:57:48,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:48,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:48,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:48,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:48,315 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,SelfDestructingSolverStorable26 [2023-11-17 15:57:48,315 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:48,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1844486854, now seen corresponding path program 9 times [2023-11-17 15:57:48,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:48,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141934939] [2023-11-17 15:57:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:48,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:48,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141934939] [2023-11-17 15:57:48,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141934939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492054973] [2023-11-17 15:57:48,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:57:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:48,669 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:48,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 15:57:48,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:57:48,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:48,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 15:57:48,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:57:48,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:57:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:48,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:49,110 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (let ((.cse3 (forall ((~get2~0.base Int) (v_ArrVal_665 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_665) ~get2~0.base) .cse1) |c_thread1Thread1of1ForFork0_#t~mem2|))))) (and (forall ((~get2~0.base Int) (v_ArrVal_665 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_665))) (let ((.cse0 (select .cse2 ~get2~0.base))) (or (not (= (select .cse0 .cse1) |c_thread1Thread1of1ForFork0_#t~mem2|)) (= (select .cse0 c_~get2~0.offset) (select (select .cse2 c_~get1~0.base) c_~get1~0.offset)))))) (or (< 0 c_~n2~0) .cse3) (or (< 0 c_~n1~0) .cse3)))) is different from false [2023-11-17 15:57:49,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:49,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-11-17 15:57:49,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 15:57:49,167 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 15:57:49,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-11-17 15:57:49,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:49,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-11-17 15:57:49,317 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:49,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-11-17 15:57:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:49,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492054973] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:49,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:49,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 27 [2023-11-17 15:57:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109496976] [2023-11-17 15:57:49,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:49,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:57:49,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:49,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:57:49,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=601, Unknown=1, NotChecked=50, Total=756 [2023-11-17 15:57:49,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 479 [2023-11-17 15:57:49,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1692 flow. Second operand has 11 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:49,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:49,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 479 [2023-11-17 15:57:49,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:49,896 INFO L124 PetriNetUnfolderBase]: 1300/2098 cut-off events. [2023-11-17 15:57:49,896 INFO L125 PetriNetUnfolderBase]: For 18194/18194 co-relation queries the response was YES. [2023-11-17 15:57:49,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13925 conditions, 2098 events. 1300/2098 cut-off events. For 18194/18194 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10588 event pairs, 374 based on Foata normal form. 24/2122 useless extension candidates. Maximal degree in co-relation 13887. Up to 1270 conditions per place. [2023-11-17 15:57:49,909 INFO L140 encePairwiseOnDemand]: 464/479 looper letters, 101 selfloop transitions, 94 changer transitions 0/195 dead transitions. [2023-11-17 15:57:49,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 195 transitions, 2912 flow [2023-11-17 15:57:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1616 transitions. [2023-11-17 15:57:49,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30669956348453215 [2023-11-17 15:57:49,910 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1616 transitions. [2023-11-17 15:57:49,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1616 transitions. [2023-11-17 15:57:49,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:49,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1616 transitions. [2023-11-17 15:57:49,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.9090909090909) internal successors, (1616), 11 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:49,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:49,915 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:49,915 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1692 flow. Second operand 11 states and 1616 transitions. [2023-11-17 15:57:49,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 195 transitions, 2912 flow [2023-11-17 15:57:49,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 195 transitions, 2747 flow, removed 62 selfloop flow, removed 5 redundant places. [2023-11-17 15:57:49,958 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 2374 flow [2023-11-17 15:57:49,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2374, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2023-11-17 15:57:49,959 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 90 predicate places. [2023-11-17 15:57:49,959 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 2374 flow [2023-11-17 15:57:49,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:49,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:49,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:49,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:50,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 15:57:50,161 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:50,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1015706000, now seen corresponding path program 10 times [2023-11-17 15:57:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:50,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455496818] [2023-11-17 15:57:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:50,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455496818] [2023-11-17 15:57:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455496818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494284250] [2023-11-17 15:57:50,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:57:50,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:50,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:50,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 15:57:50,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:57:50,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:50,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 15:57:50,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:57:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:57:50,786 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 15:57:50,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-17 15:57:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:57:50,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:57:50,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494284250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:57:50,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:57:50,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-11-17 15:57:50,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838683442] [2023-11-17 15:57:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:50,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-11-17 15:57:50,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 479 [2023-11-17 15:57:50,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 2374 flow. Second operand has 10 states, 10 states have (on average 158.9) internal successors, (1589), 10 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:50,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:50,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 479 [2023-11-17 15:57:50,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:51,214 INFO L124 PetriNetUnfolderBase]: 1306/2154 cut-off events. [2023-11-17 15:57:51,214 INFO L125 PetriNetUnfolderBase]: For 18169/18169 co-relation queries the response was YES. [2023-11-17 15:57:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14695 conditions, 2154 events. 1306/2154 cut-off events. For 18169/18169 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11341 event pairs, 196 based on Foata normal form. 24/2178 useless extension candidates. Maximal degree in co-relation 14653. Up to 1098 conditions per place. [2023-11-17 15:57:51,227 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 141 selfloop transitions, 69 changer transitions 0/210 dead transitions. [2023-11-17 15:57:51,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 210 transitions, 3315 flow [2023-11-17 15:57:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:57:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:57:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1317 transitions. [2023-11-17 15:57:51,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34368475991649267 [2023-11-17 15:57:51,229 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1317 transitions. [2023-11-17 15:57:51,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1317 transitions. [2023-11-17 15:57:51,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:51,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1317 transitions. [2023-11-17 15:57:51,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.625) internal successors, (1317), 8 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:51,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:51,232 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:51,232 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 2374 flow. Second operand 8 states and 1317 transitions. [2023-11-17 15:57:51,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 210 transitions, 3315 flow [2023-11-17 15:57:51,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 210 transitions, 3231 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-17 15:57:51,278 INFO L231 Difference]: Finished difference. Result has 119 places, 164 transitions, 2491 flow [2023-11-17 15:57:51,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2491, PETRI_PLACES=119, PETRI_TRANSITIONS=164} [2023-11-17 15:57:51,278 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 94 predicate places. [2023-11-17 15:57:51,279 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 164 transitions, 2491 flow [2023-11-17 15:57:51,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.9) internal successors, (1589), 10 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:51,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:51,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:51,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:51,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 15:57:51,481 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:51,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:51,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1846865438, now seen corresponding path program 11 times [2023-11-17 15:57:51,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:51,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299049336] [2023-11-17 15:57:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:51,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:51,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299049336] [2023-11-17 15:57:51,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299049336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830343470] [2023-11-17 15:57:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:57:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:51,801 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:51,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 15:57:51,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:51,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 15:57:51,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:51,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:57:51,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:52,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:57:52,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:57:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:52,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:52,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:52,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 57 [2023-11-17 15:57:52,386 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:52,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 868 treesize of output 756 [2023-11-17 15:57:52,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:52,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 348 [2023-11-17 15:57:52,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:52,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 308 [2023-11-17 15:57:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:52,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830343470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:52,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:52,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-11-17 15:57:52,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243106534] [2023-11-17 15:57:52,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:52,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:57:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:57:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=622, Unknown=14, NotChecked=0, Total=756 [2023-11-17 15:57:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 479 [2023-11-17 15:57:52,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 164 transitions, 2491 flow. Second operand has 28 states, 28 states have (on average 138.57142857142858) internal successors, (3880), 28 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:52,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 479 [2023-11-17 15:57:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:53,667 INFO L124 PetriNetUnfolderBase]: 1834/2924 cut-off events. [2023-11-17 15:57:53,668 INFO L125 PetriNetUnfolderBase]: For 25773/25773 co-relation queries the response was YES. [2023-11-17 15:57:53,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19453 conditions, 2924 events. 1834/2924 cut-off events. For 25773/25773 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15422 event pairs, 376 based on Foata normal form. 4/2928 useless extension candidates. Maximal degree in co-relation 19409. Up to 1337 conditions per place. [2023-11-17 15:57:53,686 INFO L140 encePairwiseOnDemand]: 465/479 looper letters, 131 selfloop transitions, 127 changer transitions 0/258 dead transitions. [2023-11-17 15:57:53,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 258 transitions, 4094 flow [2023-11-17 15:57:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 15:57:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 15:57:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2278 transitions. [2023-11-17 15:57:53,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2972338204592902 [2023-11-17 15:57:53,689 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2278 transitions. [2023-11-17 15:57:53,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2278 transitions. [2023-11-17 15:57:53,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:53,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2278 transitions. [2023-11-17 15:57:53,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.375) internal successors, (2278), 16 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:53,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 479.0) internal successors, (8143), 17 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:53,694 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 479.0) internal successors, (8143), 17 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:53,694 INFO L175 Difference]: Start difference. First operand has 119 places, 164 transitions, 2491 flow. Second operand 16 states and 2278 transitions. [2023-11-17 15:57:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 258 transitions, 4094 flow [2023-11-17 15:57:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 258 transitions, 3912 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-11-17 15:57:53,762 INFO L231 Difference]: Finished difference. Result has 134 places, 194 transitions, 3023 flow [2023-11-17 15:57:53,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3023, PETRI_PLACES=134, PETRI_TRANSITIONS=194} [2023-11-17 15:57:53,763 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 109 predicate places. [2023-11-17 15:57:53,763 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 194 transitions, 3023 flow [2023-11-17 15:57:53,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 138.57142857142858) internal successors, (3880), 28 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:53,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:53,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:53,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:53,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:53,968 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:53,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 304663956, now seen corresponding path program 12 times [2023-11-17 15:57:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:53,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503901808] [2023-11-17 15:57:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:54,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503901808] [2023-11-17 15:57:54,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503901808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:54,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925454383] [2023-11-17 15:57:54,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:57:54,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:54,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:54,266 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:54,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 15:57:54,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 15:57:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:54,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:54,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:54,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:54,609 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:54,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:54,613 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:54,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:54,645 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:57:54,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 15:57:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:54,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925454383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:54,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:54,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-11-17 15:57:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691948117] [2023-11-17 15:57:54,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 15:57:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 15:57:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:57:54,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 479 [2023-11-17 15:57:54,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 194 transitions, 3023 flow. Second operand has 22 states, 22 states have (on average 147.77272727272728) internal successors, (3251), 22 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:54,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 479 [2023-11-17 15:57:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:55,338 INFO L124 PetriNetUnfolderBase]: 1790/2880 cut-off events. [2023-11-17 15:57:55,338 INFO L125 PetriNetUnfolderBase]: For 27575/27575 co-relation queries the response was YES. [2023-11-17 15:57:55,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20209 conditions, 2880 events. 1790/2880 cut-off events. For 27575/27575 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15321 event pairs, 406 based on Foata normal form. 44/2924 useless extension candidates. Maximal degree in co-relation 20160. Up to 2033 conditions per place. [2023-11-17 15:57:55,356 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 179 selfloop transitions, 78 changer transitions 0/257 dead transitions. [2023-11-17 15:57:55,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 257 transitions, 4374 flow [2023-11-17 15:57:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1665 transitions. [2023-11-17 15:57:55,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159992408426646 [2023-11-17 15:57:55,358 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1665 transitions. [2023-11-17 15:57:55,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1665 transitions. [2023-11-17 15:57:55,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:55,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1665 transitions. [2023-11-17 15:57:55,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 151.36363636363637) internal successors, (1665), 11 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:55,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:55,361 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:55,362 INFO L175 Difference]: Start difference. First operand has 134 places, 194 transitions, 3023 flow. Second operand 11 states and 1665 transitions. [2023-11-17 15:57:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 257 transitions, 4374 flow [2023-11-17 15:57:55,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 257 transitions, 4156 flow, removed 66 selfloop flow, removed 7 redundant places. [2023-11-17 15:57:55,444 INFO L231 Difference]: Finished difference. Result has 140 places, 208 transitions, 3456 flow [2023-11-17 15:57:55,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3456, PETRI_PLACES=140, PETRI_TRANSITIONS=208} [2023-11-17 15:57:55,445 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 115 predicate places. [2023-11-17 15:57:55,445 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 208 transitions, 3456 flow [2023-11-17 15:57:55,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 147.77272727272728) internal successors, (3251), 22 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:55,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:55,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:55,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:55,648 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,SelfDestructingSolverStorable30 [2023-11-17 15:57:55,648 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:55,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash 381131702, now seen corresponding path program 13 times [2023-11-17 15:57:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876527141] [2023-11-17 15:57:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:55,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876527141] [2023-11-17 15:57:55,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876527141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978157269] [2023-11-17 15:57:55,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:57:55,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:55,887 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:55,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 15:57:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:55,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 15:57:55,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:56,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:57:56,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:56,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:57:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:56,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:56,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-17 15:57:56,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1206 treesize of output 1090 [2023-11-17 15:57:56,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-11-17 15:57:56,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-11-17 15:57:56,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-17 15:57:56,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2023-11-17 15:57:56,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-11-17 15:57:56,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:56,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-11-17 15:57:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:56,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978157269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:56,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:56,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-11-17 15:57:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593254686] [2023-11-17 15:57:56,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:56,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 15:57:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 15:57:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=578, Unknown=10, NotChecked=0, Total=702 [2023-11-17 15:57:56,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 479 [2023-11-17 15:57:56,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 208 transitions, 3456 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:56,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:56,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 479 [2023-11-17 15:57:56,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:57,448 INFO L124 PetriNetUnfolderBase]: 1786/2878 cut-off events. [2023-11-17 15:57:57,448 INFO L125 PetriNetUnfolderBase]: For 27058/27058 co-relation queries the response was YES. [2023-11-17 15:57:57,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20333 conditions, 2878 events. 1786/2878 cut-off events. For 27058/27058 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15341 event pairs, 404 based on Foata normal form. 6/2884 useless extension candidates. Maximal degree in co-relation 20281. Up to 1985 conditions per place. [2023-11-17 15:57:57,466 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 165 selfloop transitions, 80 changer transitions 0/245 dead transitions. [2023-11-17 15:57:57,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 245 transitions, 4351 flow [2023-11-17 15:57:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:57:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:57:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1561 transitions. [2023-11-17 15:57:57,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29626115012336307 [2023-11-17 15:57:57,468 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1561 transitions. [2023-11-17 15:57:57,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1561 transitions. [2023-11-17 15:57:57,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:57,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1561 transitions. [2023-11-17 15:57:57,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 141.9090909090909) internal successors, (1561), 11 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:57,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:57,472 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:57,472 INFO L175 Difference]: Start difference. First operand has 140 places, 208 transitions, 3456 flow. Second operand 11 states and 1561 transitions. [2023-11-17 15:57:57,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 245 transitions, 4351 flow [2023-11-17 15:57:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 245 transitions, 4085 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-11-17 15:57:57,555 INFO L231 Difference]: Finished difference. Result has 145 places, 213 transitions, 3501 flow [2023-11-17 15:57:57,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3501, PETRI_PLACES=145, PETRI_TRANSITIONS=213} [2023-11-17 15:57:57,556 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 120 predicate places. [2023-11-17 15:57:57,556 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 213 transitions, 3501 flow [2023-11-17 15:57:57,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:57,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:57,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:57,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-17 15:57:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:57,761 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:57,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash 934152482, now seen corresponding path program 14 times [2023-11-17 15:57:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489281384] [2023-11-17 15:57:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:58,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489281384] [2023-11-17 15:57:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489281384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316888520] [2023-11-17 15:57:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:57:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:58,014 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:58,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 15:57:58,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:58,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:58,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:58,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:58,310 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:58,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:58,314 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:58,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-17 15:57:58,344 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:57:58,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 15:57:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316888520] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:58,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:57:58,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-11-17 15:57:58,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090483151] [2023-11-17 15:57:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:57:58,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:57:58,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:57:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:57:58,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 479 [2023-11-17 15:57:58,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 213 transitions, 3501 flow. Second operand has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:58,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:58,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 479 [2023-11-17 15:57:58,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:58,941 INFO L124 PetriNetUnfolderBase]: 1746/2790 cut-off events. [2023-11-17 15:57:58,941 INFO L125 PetriNetUnfolderBase]: For 25589/25589 co-relation queries the response was YES. [2023-11-17 15:57:58,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19543 conditions, 2790 events. 1746/2790 cut-off events. For 25589/25589 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14580 event pairs, 386 based on Foata normal form. 4/2794 useless extension candidates. Maximal degree in co-relation 19489. Up to 1940 conditions per place. [2023-11-17 15:57:58,960 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 165 selfloop transitions, 77 changer transitions 0/242 dead transitions. [2023-11-17 15:57:58,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 242 transitions, 4227 flow [2023-11-17 15:57:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:57:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:57:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1551 transitions. [2023-11-17 15:57:58,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237995824634656 [2023-11-17 15:57:58,964 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1551 transitions. [2023-11-17 15:57:58,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1551 transitions. [2023-11-17 15:57:58,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:58,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1551 transitions. [2023-11-17 15:57:58,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.1) internal successors, (1551), 10 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:58,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:58,968 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:58,968 INFO L175 Difference]: Start difference. First operand has 145 places, 213 transitions, 3501 flow. Second operand 10 states and 1551 transitions. [2023-11-17 15:57:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 242 transitions, 4227 flow [2023-11-17 15:57:59,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 242 transitions, 4036 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-11-17 15:57:59,047 INFO L231 Difference]: Finished difference. Result has 147 places, 213 transitions, 3464 flow [2023-11-17 15:57:59,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3464, PETRI_PLACES=147, PETRI_TRANSITIONS=213} [2023-11-17 15:57:59,048 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 122 predicate places. [2023-11-17 15:57:59,048 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 213 transitions, 3464 flow [2023-11-17 15:57:59,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.9) internal successors, (1519), 10 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:59,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:59,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:59,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 15:57:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:59,248 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:59,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1117576761, now seen corresponding path program 1 times [2023-11-17 15:57:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:59,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607927447] [2023-11-17 15:57:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607927447] [2023-11-17 15:57:59,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607927447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380766871] [2023-11-17 15:57:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:59,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:59,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:59,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:59,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 15:57:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:59,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:59,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:57:59,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:59,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:59,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:58:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:58:00,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380766871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:58:00,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:58:00,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 15:58:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392809588] [2023-11-17 15:58:00,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:58:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 15:58:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 15:58:00,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-17 15:58:00,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 479 [2023-11-17 15:58:00,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 213 transitions, 3464 flow. Second operand has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:00,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:00,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 479 [2023-11-17 15:58:00,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:01,094 INFO L124 PetriNetUnfolderBase]: 3976/6112 cut-off events. [2023-11-17 15:58:01,094 INFO L125 PetriNetUnfolderBase]: For 55204/55204 co-relation queries the response was YES. [2023-11-17 15:58:01,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43874 conditions, 6112 events. 3976/6112 cut-off events. For 55204/55204 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34621 event pairs, 804 based on Foata normal form. 72/6184 useless extension candidates. Maximal degree in co-relation 43819. Up to 1827 conditions per place. [2023-11-17 15:58:01,142 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 392 selfloop transitions, 192 changer transitions 31/615 dead transitions. [2023-11-17 15:58:01,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 615 transitions, 11122 flow [2023-11-17 15:58:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:58:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:58:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2219 transitions. [2023-11-17 15:58:01,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35635137305283443 [2023-11-17 15:58:01,144 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2219 transitions. [2023-11-17 15:58:01,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2219 transitions. [2023-11-17 15:58:01,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:01,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2219 transitions. [2023-11-17 15:58:01,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 170.69230769230768) internal successors, (2219), 13 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:01,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 479.0) internal successors, (6706), 14 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:01,150 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 479.0) internal successors, (6706), 14 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:01,150 INFO L175 Difference]: Start difference. First operand has 147 places, 213 transitions, 3464 flow. Second operand 13 states and 2219 transitions. [2023-11-17 15:58:01,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 615 transitions, 11122 flow [2023-11-17 15:58:01,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 615 transitions, 10699 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-17 15:58:01,489 INFO L231 Difference]: Finished difference. Result has 156 places, 343 transitions, 6188 flow [2023-11-17 15:58:01,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6188, PETRI_PLACES=156, PETRI_TRANSITIONS=343} [2023-11-17 15:58:01,489 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 131 predicate places. [2023-11-17 15:58:01,489 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 343 transitions, 6188 flow [2023-11-17 15:58:01,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 165.0952380952381) internal successors, (3467), 21 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:01,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:01,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:01,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:01,692 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:01,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1341878678, now seen corresponding path program 1 times [2023-11-17 15:58:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491708509] [2023-11-17 15:58:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491708509] [2023-11-17 15:58:02,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491708509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213162496] [2023-11-17 15:58:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:02,478 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:02,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 15:58:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:02,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 15:58:02,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:02,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:02,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:02,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:02,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:02,874 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:02,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213162496] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:03,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:58:03,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 30 [2023-11-17 15:58:03,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381733643] [2023-11-17 15:58:03,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:03,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2023-11-17 15:58:03,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 479 [2023-11-17 15:58:03,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 343 transitions, 6188 flow. Second operand has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:03,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:03,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 479 [2023-11-17 15:58:03,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:04,503 INFO L124 PetriNetUnfolderBase]: 3887/6004 cut-off events. [2023-11-17 15:58:04,504 INFO L125 PetriNetUnfolderBase]: For 61044/61044 co-relation queries the response was YES. [2023-11-17 15:58:04,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44779 conditions, 6004 events. 3887/6004 cut-off events. For 61044/61044 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34291 event pairs, 1041 based on Foata normal form. 2/6006 useless extension candidates. Maximal degree in co-relation 44719. Up to 5141 conditions per place. [2023-11-17 15:58:04,551 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 365 selfloop transitions, 51 changer transitions 11/427 dead transitions. [2023-11-17 15:58:04,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 427 transitions, 8507 flow [2023-11-17 15:58:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:58:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:58:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1637 transitions. [2023-11-17 15:58:04,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31068513949516036 [2023-11-17 15:58:04,553 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1637 transitions. [2023-11-17 15:58:04,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1637 transitions. [2023-11-17 15:58:04,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:04,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1637 transitions. [2023-11-17 15:58:04,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 148.8181818181818) internal successors, (1637), 11 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:04,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:04,557 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:04,557 INFO L175 Difference]: Start difference. First operand has 156 places, 343 transitions, 6188 flow. Second operand 11 states and 1637 transitions. [2023-11-17 15:58:04,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 427 transitions, 8507 flow [2023-11-17 15:58:04,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 427 transitions, 8285 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-17 15:58:04,865 INFO L231 Difference]: Finished difference. Result has 166 places, 354 transitions, 6381 flow [2023-11-17 15:58:04,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6381, PETRI_PLACES=166, PETRI_TRANSITIONS=354} [2023-11-17 15:58:04,866 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 141 predicate places. [2023-11-17 15:58:04,866 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 354 transitions, 6381 flow [2023-11-17 15:58:04,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:04,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:04,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:04,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-17 15:58:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:05,068 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:05,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1245799220, now seen corresponding path program 2 times [2023-11-17 15:58:05,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:05,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074203652] [2023-11-17 15:58:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:05,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:05,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:05,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074203652] [2023-11-17 15:58:05,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074203652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:05,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341880629] [2023-11-17 15:58:05,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:58:05,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:05,787 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:05,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 15:58:05,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:58:05,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:05,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 15:58:05,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:06,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:06,141 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:06,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:06,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341880629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:06,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:06,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-11-17 15:58:06,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829916090] [2023-11-17 15:58:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:06,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:06,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:06,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 354 transitions, 6381 flow. Second operand has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:06,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:06,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:06,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:07,300 INFO L124 PetriNetUnfolderBase]: 3987/6164 cut-off events. [2023-11-17 15:58:07,300 INFO L125 PetriNetUnfolderBase]: For 68284/68284 co-relation queries the response was YES. [2023-11-17 15:58:07,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46320 conditions, 6164 events. 3987/6164 cut-off events. For 68284/68284 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35389 event pairs, 954 based on Foata normal form. 2/6166 useless extension candidates. Maximal degree in co-relation 46256. Up to 4466 conditions per place. [2023-11-17 15:58:07,353 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 278 selfloop transitions, 114 changer transitions 27/419 dead transitions. [2023-11-17 15:58:07,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 419 transitions, 8252 flow [2023-11-17 15:58:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1658 transitions. [2023-11-17 15:58:07,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34613778705636744 [2023-11-17 15:58:07,355 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1658 transitions. [2023-11-17 15:58:07,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1658 transitions. [2023-11-17 15:58:07,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:07,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1658 transitions. [2023-11-17 15:58:07,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.8) internal successors, (1658), 10 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:07,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:07,359 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:07,359 INFO L175 Difference]: Start difference. First operand has 166 places, 354 transitions, 6381 flow. Second operand 10 states and 1658 transitions. [2023-11-17 15:58:07,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 419 transitions, 8252 flow [2023-11-17 15:58:07,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 419 transitions, 8168 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 15:58:07,698 INFO L231 Difference]: Finished difference. Result has 171 places, 357 transitions, 6667 flow [2023-11-17 15:58:07,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6667, PETRI_PLACES=171, PETRI_TRANSITIONS=357} [2023-11-17 15:58:07,699 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 146 predicate places. [2023-11-17 15:58:07,699 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 357 transitions, 6667 flow [2023-11-17 15:58:07,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:07,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:07,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:07,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 15:58:07,899 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,SelfDestructingSolverStorable35 [2023-11-17 15:58:07,900 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:07,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash -397291770, now seen corresponding path program 3 times [2023-11-17 15:58:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:07,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513692662] [2023-11-17 15:58:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:08,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:08,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513692662] [2023-11-17 15:58:08,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513692662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:08,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899285354] [2023-11-17 15:58:08,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:58:08,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:08,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:08,711 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:08,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 15:58:08,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:58:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:08,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:58:08,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:58:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:58:09,137 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 15:58:09,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2023-11-17 15:58:09,272 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:58:09,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2023-11-17 15:58:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:09,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:09,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899285354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:09,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:09,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2023-11-17 15:58:09,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303641339] [2023-11-17 15:58:09,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:09,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:58:09,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:09,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:58:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-11-17 15:58:09,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 479 [2023-11-17 15:58:09,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 357 transitions, 6667 flow. Second operand has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:09,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:09,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 479 [2023-11-17 15:58:09,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:10,355 INFO L124 PetriNetUnfolderBase]: 3953/6118 cut-off events. [2023-11-17 15:58:10,355 INFO L125 PetriNetUnfolderBase]: For 76130/76130 co-relation queries the response was YES. [2023-11-17 15:58:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47252 conditions, 6118 events. 3953/6118 cut-off events. For 76130/76130 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35108 event pairs, 902 based on Foata normal form. 2/6120 useless extension candidates. Maximal degree in co-relation 47185. Up to 4233 conditions per place. [2023-11-17 15:58:10,405 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 339 selfloop transitions, 89 changer transitions 10/438 dead transitions. [2023-11-17 15:58:10,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 438 transitions, 8778 flow [2023-11-17 15:58:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1576 transitions. [2023-11-17 15:58:10,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3290187891440501 [2023-11-17 15:58:10,407 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1576 transitions. [2023-11-17 15:58:10,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1576 transitions. [2023-11-17 15:58:10,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:10,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1576 transitions. [2023-11-17 15:58:10,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 157.6) internal successors, (1576), 10 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:10,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:10,411 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:10,411 INFO L175 Difference]: Start difference. First operand has 171 places, 357 transitions, 6667 flow. Second operand 10 states and 1576 transitions. [2023-11-17 15:58:10,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 438 transitions, 8778 flow [2023-11-17 15:58:10,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 438 transitions, 8546 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-11-17 15:58:10,746 INFO L231 Difference]: Finished difference. Result has 173 places, 359 transitions, 6725 flow [2023-11-17 15:58:10,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6725, PETRI_PLACES=173, PETRI_TRANSITIONS=359} [2023-11-17 15:58:10,746 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 148 predicate places. [2023-11-17 15:58:10,746 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 359 transitions, 6725 flow [2023-11-17 15:58:10,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:10,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:10,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:10,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:10,951 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,SelfDestructingSolverStorable36 [2023-11-17 15:58:10,951 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:10,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash 843109590, now seen corresponding path program 4 times [2023-11-17 15:58:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:10,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731223069] [2023-11-17 15:58:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:11,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731223069] [2023-11-17 15:58:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731223069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172351649] [2023-11-17 15:58:11,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:58:11,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:11,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:11,659 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:11,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 15:58:11,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:58:11,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:11,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 15:58:11,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:11,919 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 15:58:11,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2023-11-17 15:58:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:11,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:11,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172351649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:11,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:11,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2023-11-17 15:58:11,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846880201] [2023-11-17 15:58:11,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:11,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:58:11,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:58:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:11,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:11,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 359 transitions, 6725 flow. Second operand has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:11,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:11,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:11,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:12,919 INFO L124 PetriNetUnfolderBase]: 3984/6167 cut-off events. [2023-11-17 15:58:12,920 INFO L125 PetriNetUnfolderBase]: For 77643/77643 co-relation queries the response was YES. [2023-11-17 15:58:12,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48396 conditions, 6167 events. 3984/6167 cut-off events. For 77643/77643 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35525 event pairs, 934 based on Foata normal form. 2/6169 useless extension candidates. Maximal degree in co-relation 48327. Up to 4478 conditions per place. [2023-11-17 15:58:12,971 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 280 selfloop transitions, 129 changer transitions 5/414 dead transitions. [2023-11-17 15:58:12,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 414 transitions, 8410 flow [2023-11-17 15:58:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1661 transitions. [2023-11-17 15:58:12,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467640918580376 [2023-11-17 15:58:12,973 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1661 transitions. [2023-11-17 15:58:12,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1661 transitions. [2023-11-17 15:58:12,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:12,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1661 transitions. [2023-11-17 15:58:12,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 166.1) internal successors, (1661), 10 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:12,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:12,976 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:12,976 INFO L175 Difference]: Start difference. First operand has 173 places, 359 transitions, 6725 flow. Second operand 10 states and 1661 transitions. [2023-11-17 15:58:12,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 414 transitions, 8410 flow [2023-11-17 15:58:13,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 414 transitions, 8102 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-11-17 15:58:13,325 INFO L231 Difference]: Finished difference. Result has 176 places, 374 transitions, 7100 flow [2023-11-17 15:58:13,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6436, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7100, PETRI_PLACES=176, PETRI_TRANSITIONS=374} [2023-11-17 15:58:13,325 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 151 predicate places. [2023-11-17 15:58:13,325 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 374 transitions, 7100 flow [2023-11-17 15:58:13,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:13,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:13,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:13,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-17 15:58:13,526 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,SelfDestructingSolverStorable37 [2023-11-17 15:58:13,526 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:13,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash 339421430, now seen corresponding path program 5 times [2023-11-17 15:58:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:13,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366522106] [2023-11-17 15:58:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366522106] [2023-11-17 15:58:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366522106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:14,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945029796] [2023-11-17 15:58:14,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:58:14,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:14,347 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 15:58:14,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:58:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:14,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 15:58:14,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:58:14,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-17 15:58:14,475 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:58:14,481 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:58:14,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 15:58:14,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:14,565 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:58:14,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 15:58:14,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:14,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:14,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:14,948 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:58:14,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2023-11-17 15:58:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:14,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:15,623 INFO L349 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2023-11-17 15:58:15,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 58 [2023-11-17 15:58:15,656 INFO L349 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2023-11-17 15:58:15,656 INFO L378 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 1168 treesize of output 1062 [2023-11-17 15:58:15,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:15,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-17 15:58:15,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:15,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-17 15:58:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945029796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:58:15,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:58:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-17 15:58:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868583098] [2023-11-17 15:58:15,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:58:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 15:58:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 15:58:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1123, Unknown=8, NotChecked=0, Total=1406 [2023-11-17 15:58:15,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 479 [2023-11-17 15:58:15,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 374 transitions, 7100 flow. Second operand has 38 states, 38 states have (on average 121.47368421052632) internal successors, (4616), 38 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:15,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:15,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 479 [2023-11-17 15:58:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:17,974 INFO L124 PetriNetUnfolderBase]: 4004/6231 cut-off events. [2023-11-17 15:58:17,975 INFO L125 PetriNetUnfolderBase]: For 74092/74092 co-relation queries the response was YES. [2023-11-17 15:58:18,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48636 conditions, 6231 events. 4004/6231 cut-off events. For 74092/74092 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 36541 event pairs, 558 based on Foata normal form. 30/6261 useless extension candidates. Maximal degree in co-relation 48567. Up to 2944 conditions per place. [2023-11-17 15:58:18,034 INFO L140 encePairwiseOnDemand]: 463/479 looper letters, 278 selfloop transitions, 204 changer transitions 25/507 dead transitions. [2023-11-17 15:58:18,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 507 transitions, 10003 flow [2023-11-17 15:58:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 15:58:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 15:58:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2132 transitions. [2023-11-17 15:58:18,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2618199680707356 [2023-11-17 15:58:18,037 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2132 transitions. [2023-11-17 15:58:18,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2132 transitions. [2023-11-17 15:58:18,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:18,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2132 transitions. [2023-11-17 15:58:18,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 125.41176470588235) internal successors, (2132), 17 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:18,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:18,042 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:18,042 INFO L175 Difference]: Start difference. First operand has 176 places, 374 transitions, 7100 flow. Second operand 17 states and 2132 transitions. [2023-11-17 15:58:18,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 507 transitions, 10003 flow [2023-11-17 15:58:18,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 507 transitions, 9699 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-11-17 15:58:18,455 INFO L231 Difference]: Finished difference. Result has 192 places, 391 transitions, 7606 flow [2023-11-17 15:58:18,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7606, PETRI_PLACES=192, PETRI_TRANSITIONS=391} [2023-11-17 15:58:18,456 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2023-11-17 15:58:18,456 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 391 transitions, 7606 flow [2023-11-17 15:58:18,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 121.47368421052632) internal successors, (4616), 38 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:18,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:18,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:18,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 15:58:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 15:58:18,658 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:18,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1529651068, now seen corresponding path program 6 times [2023-11-17 15:58:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:18,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878375220] [2023-11-17 15:58:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878375220] [2023-11-17 15:58:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878375220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141002516] [2023-11-17 15:58:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:58:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:19,165 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:19,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 15:58:19,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 15:58:19,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:19,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 15:58:19,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:19,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:19,456 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:19,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141002516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:19,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:19,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-11-17 15:58:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823486360] [2023-11-17 15:58:19,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:19,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:19,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:19,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 391 transitions, 7606 flow. Second operand has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:19,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:19,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:20,616 INFO L124 PetriNetUnfolderBase]: 3959/6164 cut-off events. [2023-11-17 15:58:20,616 INFO L125 PetriNetUnfolderBase]: For 82966/82966 co-relation queries the response was YES. [2023-11-17 15:58:20,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49941 conditions, 6164 events. 3959/6164 cut-off events. For 82966/82966 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35871 event pairs, 904 based on Foata normal form. 2/6166 useless extension candidates. Maximal degree in co-relation 49866. Up to 4558 conditions per place. [2023-11-17 15:58:20,673 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 307 selfloop transitions, 110 changer transitions 12/429 dead transitions. [2023-11-17 15:58:20,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 429 transitions, 8961 flow [2023-11-17 15:58:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1657 transitions. [2023-11-17 15:58:20,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34592901878914406 [2023-11-17 15:58:20,675 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1657 transitions. [2023-11-17 15:58:20,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1657 transitions. [2023-11-17 15:58:20,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:20,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1657 transitions. [2023-11-17 15:58:20,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.7) internal successors, (1657), 10 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:20,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:20,678 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:20,678 INFO L175 Difference]: Start difference. First operand has 192 places, 391 transitions, 7606 flow. Second operand 10 states and 1657 transitions. [2023-11-17 15:58:20,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 429 transitions, 8961 flow [2023-11-17 15:58:21,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 429 transitions, 8574 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-11-17 15:58:21,048 INFO L231 Difference]: Finished difference. Result has 184 places, 385 transitions, 7310 flow [2023-11-17 15:58:21,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7222, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7310, PETRI_PLACES=184, PETRI_TRANSITIONS=385} [2023-11-17 15:58:21,048 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 159 predicate places. [2023-11-17 15:58:21,048 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 385 transitions, 7310 flow [2023-11-17 15:58:21,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:21,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:21,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:21,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 15:58:21,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 15:58:21,253 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:21,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:21,253 INFO L85 PathProgramCache]: Analyzing trace with hash -825943100, now seen corresponding path program 7 times [2023-11-17 15:58:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140713988] [2023-11-17 15:58:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:21,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:21,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140713988] [2023-11-17 15:58:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140713988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:22,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262089598] [2023-11-17 15:58:22,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:58:22,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:22,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:22,001 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:22,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 15:58:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:22,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 15:58:22,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:22,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:22,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:22,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:22,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:22,385 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:22,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:22,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262089598] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:22,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:58:22,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 29 [2023-11-17 15:58:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88318728] [2023-11-17 15:58:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:22,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:22,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-11-17 15:58:22,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 479 [2023-11-17 15:58:22,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 385 transitions, 7310 flow. Second operand has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:22,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:22,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 479 [2023-11-17 15:58:22,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:24,139 INFO L124 PetriNetUnfolderBase]: 3937/6138 cut-off events. [2023-11-17 15:58:24,140 INFO L125 PetriNetUnfolderBase]: For 76184/76184 co-relation queries the response was YES. [2023-11-17 15:58:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48557 conditions, 6138 events. 3937/6138 cut-off events. For 76184/76184 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35702 event pairs, 1040 based on Foata normal form. 2/6140 useless extension candidates. Maximal degree in co-relation 48485. Up to 5286 conditions per place. [2023-11-17 15:58:24,191 INFO L140 encePairwiseOnDemand]: 466/479 looper letters, 351 selfloop transitions, 85 changer transitions 11/447 dead transitions. [2023-11-17 15:58:24,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 447 transitions, 9243 flow [2023-11-17 15:58:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:58:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:58:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1638 transitions. [2023-11-17 15:58:24,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3108749288289998 [2023-11-17 15:58:24,194 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1638 transitions. [2023-11-17 15:58:24,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1638 transitions. [2023-11-17 15:58:24,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:24,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1638 transitions. [2023-11-17 15:58:24,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 148.9090909090909) internal successors, (1638), 11 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:24,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:24,197 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:24,197 INFO L175 Difference]: Start difference. First operand has 184 places, 385 transitions, 7310 flow. Second operand 11 states and 1638 transitions. [2023-11-17 15:58:24,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 447 transitions, 9243 flow [2023-11-17 15:58:24,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 447 transitions, 9005 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-17 15:58:24,519 INFO L231 Difference]: Finished difference. Result has 188 places, 417 transitions, 8093 flow [2023-11-17 15:58:24,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7086, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8093, PETRI_PLACES=188, PETRI_TRANSITIONS=417} [2023-11-17 15:58:24,519 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 163 predicate places. [2023-11-17 15:58:24,520 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 417 transitions, 8093 flow [2023-11-17 15:58:24,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:24,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:24,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:24,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:24,724 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,SelfDestructingSolverStorable40 [2023-11-17 15:58:24,724 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:24,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash -542091252, now seen corresponding path program 8 times [2023-11-17 15:58:24,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:24,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159932563] [2023-11-17 15:58:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:24,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:25,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159932563] [2023-11-17 15:58:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159932563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987257877] [2023-11-17 15:58:25,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:58:25,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:25,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:25,376 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:25,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 15:58:25,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:58:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:25,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 15:58:25,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:25,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:25,791 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:25,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987257877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:25,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:25,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-11-17 15:58:25,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866633320] [2023-11-17 15:58:25,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:25,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:25,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:58:25,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:25,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 417 transitions, 8093 flow. Second operand has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:25,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:25,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:25,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:26,937 INFO L124 PetriNetUnfolderBase]: 3935/6152 cut-off events. [2023-11-17 15:58:26,938 INFO L125 PetriNetUnfolderBase]: For 79381/79381 co-relation queries the response was YES. [2023-11-17 15:58:26,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48893 conditions, 6152 events. 3935/6152 cut-off events. For 79381/79381 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35917 event pairs, 951 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 48818. Up to 4562 conditions per place. [2023-11-17 15:58:27,001 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 272 selfloop transitions, 145 changer transitions 36/453 dead transitions. [2023-11-17 15:58:27,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 453 transitions, 9570 flow [2023-11-17 15:58:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1660 transitions. [2023-11-17 15:58:27,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465553235908142 [2023-11-17 15:58:27,003 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1660 transitions. [2023-11-17 15:58:27,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1660 transitions. [2023-11-17 15:58:27,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:27,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1660 transitions. [2023-11-17 15:58:27,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:27,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:27,007 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:27,007 INFO L175 Difference]: Start difference. First operand has 188 places, 417 transitions, 8093 flow. Second operand 10 states and 1660 transitions. [2023-11-17 15:58:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 453 transitions, 9570 flow [2023-11-17 15:58:27,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 453 transitions, 9540 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-17 15:58:27,379 INFO L231 Difference]: Finished difference. Result has 192 places, 405 transitions, 8034 flow [2023-11-17 15:58:27,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=8063, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8034, PETRI_PLACES=192, PETRI_TRANSITIONS=405} [2023-11-17 15:58:27,380 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2023-11-17 15:58:27,380 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 405 transitions, 8034 flow [2023-11-17 15:58:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:27,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:27,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:27,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-17 15:58:27,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:27,583 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:27,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1738534580, now seen corresponding path program 9 times [2023-11-17 15:58:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:27,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279585924] [2023-11-17 15:58:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:28,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279585924] [2023-11-17 15:58:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279585924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97751821] [2023-11-17 15:58:28,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:58:28,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:28,246 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 15:58:28,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:58:28,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:28,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 15:58:28,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:28,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:28,617 INFO L378 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 89 treesize of output 81 [2023-11-17 15:58:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:28,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97751821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:28,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:28,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2023-11-17 15:58:28,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140904745] [2023-11-17 15:58:28,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:28,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:58:28,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:58:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:28,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:28,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 405 transitions, 8034 flow. Second operand has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:28,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:28,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:28,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:29,808 INFO L124 PetriNetUnfolderBase]: 3881/6078 cut-off events. [2023-11-17 15:58:29,808 INFO L125 PetriNetUnfolderBase]: For 82937/82937 co-relation queries the response was YES. [2023-11-17 15:58:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48738 conditions, 6078 events. 3881/6078 cut-off events. For 82937/82937 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 35494 event pairs, 947 based on Foata normal form. 2/6080 useless extension candidates. Maximal degree in co-relation 48662. Up to 4554 conditions per place. [2023-11-17 15:58:29,864 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 267 selfloop transitions, 131 changer transitions 27/425 dead transitions. [2023-11-17 15:58:29,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 425 transitions, 9055 flow [2023-11-17 15:58:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1655 transitions. [2023-11-17 15:58:29,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3455114822546973 [2023-11-17 15:58:29,865 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1655 transitions. [2023-11-17 15:58:29,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1655 transitions. [2023-11-17 15:58:29,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:29,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1655 transitions. [2023-11-17 15:58:29,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.5) internal successors, (1655), 10 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:29,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:29,869 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:29,869 INFO L175 Difference]: Start difference. First operand has 192 places, 405 transitions, 8034 flow. Second operand 10 states and 1655 transitions. [2023-11-17 15:58:29,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 425 transitions, 9055 flow [2023-11-17 15:58:30,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 425 transitions, 8808 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-11-17 15:58:30,217 INFO L231 Difference]: Finished difference. Result has 194 places, 387 transitions, 7619 flow [2023-11-17 15:58:30,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7619, PETRI_PLACES=194, PETRI_TRANSITIONS=387} [2023-11-17 15:58:30,218 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2023-11-17 15:58:30,218 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 387 transitions, 7619 flow [2023-11-17 15:58:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:30,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:30,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:30,419 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:30,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash 316539402, now seen corresponding path program 10 times [2023-11-17 15:58:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503680017] [2023-11-17 15:58:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:31,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:31,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503680017] [2023-11-17 15:58:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503680017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:31,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552506090] [2023-11-17 15:58:31,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:58:31,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:31,101 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:31,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 15:58:31,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:58:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:31,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 15:58:31,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:31,388 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 15:58:31,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2023-11-17 15:58:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:31,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552506090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:31,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:31,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2023-11-17 15:58:31,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23192224] [2023-11-17 15:58:31,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:31,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:58:31,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:58:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:31,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:31,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 387 transitions, 7619 flow. Second operand has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:31,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:31,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:31,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:32,405 INFO L124 PetriNetUnfolderBase]: 3859/6028 cut-off events. [2023-11-17 15:58:32,405 INFO L125 PetriNetUnfolderBase]: For 82043/82043 co-relation queries the response was YES. [2023-11-17 15:58:32,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48061 conditions, 6028 events. 3859/6028 cut-off events. For 82043/82043 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35089 event pairs, 949 based on Foata normal form. 2/6030 useless extension candidates. Maximal degree in co-relation 47985. Up to 4542 conditions per place. [2023-11-17 15:58:32,466 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 267 selfloop transitions, 138 changer transitions 10/415 dead transitions. [2023-11-17 15:58:32,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 415 transitions, 8798 flow [2023-11-17 15:58:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1662 transitions. [2023-11-17 15:58:32,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34697286012526096 [2023-11-17 15:58:32,468 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1662 transitions. [2023-11-17 15:58:32,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1662 transitions. [2023-11-17 15:58:32,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:32,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1662 transitions. [2023-11-17 15:58:32,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 166.2) internal successors, (1662), 10 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:32,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:32,471 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:32,471 INFO L175 Difference]: Start difference. First operand has 194 places, 387 transitions, 7619 flow. Second operand 10 states and 1662 transitions. [2023-11-17 15:58:32,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 415 transitions, 8798 flow [2023-11-17 15:58:32,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 415 transitions, 8462 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-17 15:58:32,835 INFO L231 Difference]: Finished difference. Result has 191 places, 391 transitions, 7681 flow [2023-11-17 15:58:32,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7309, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7681, PETRI_PLACES=191, PETRI_TRANSITIONS=391} [2023-11-17 15:58:32,835 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 166 predicate places. [2023-11-17 15:58:32,835 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 391 transitions, 7681 flow [2023-11-17 15:58:32,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:32,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:32,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:32,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:33,036 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,SelfDestructingSolverStorable43 [2023-11-17 15:58:33,036 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:33,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2115526564, now seen corresponding path program 11 times [2023-11-17 15:58:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490236876] [2023-11-17 15:58:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490236876] [2023-11-17 15:58:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490236876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841034869] [2023-11-17 15:58:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:58:33,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:33,676 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:33,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 15:58:33,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:58:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:33,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 15:58:33,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:33,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:33,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:33,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:34,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:34,117 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:34,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:34,584 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:58:34,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 100 [2023-11-17 15:58:34,608 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:58:34,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 100 [2023-11-17 15:58:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841034869] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:58:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 30 [2023-11-17 15:58:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302914173] [2023-11-17 15:58:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-11-17 15:58:34,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 479 [2023-11-17 15:58:34,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 391 transitions, 7681 flow. Second operand has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:34,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:34,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 479 [2023-11-17 15:58:34,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:36,029 INFO L124 PetriNetUnfolderBase]: 3843/6008 cut-off events. [2023-11-17 15:58:36,029 INFO L125 PetriNetUnfolderBase]: For 78258/78258 co-relation queries the response was YES. [2023-11-17 15:58:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47694 conditions, 6008 events. 3843/6008 cut-off events. For 78258/78258 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 34916 event pairs, 620 based on Foata normal form. 2/6010 useless extension candidates. Maximal degree in co-relation 47619. Up to 3765 conditions per place. [2023-11-17 15:58:36,091 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 270 selfloop transitions, 156 changer transitions 18/444 dead transitions. [2023-11-17 15:58:36,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 444 transitions, 9104 flow [2023-11-17 15:58:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:58:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:58:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1642 transitions. [2023-11-17 15:58:36,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31163408616435756 [2023-11-17 15:58:36,093 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1642 transitions. [2023-11-17 15:58:36,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1642 transitions. [2023-11-17 15:58:36,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:36,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1642 transitions. [2023-11-17 15:58:36,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 149.27272727272728) internal successors, (1642), 11 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:36,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:36,096 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:36,096 INFO L175 Difference]: Start difference. First operand has 191 places, 391 transitions, 7681 flow. Second operand 11 states and 1642 transitions. [2023-11-17 15:58:36,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 444 transitions, 9104 flow [2023-11-17 15:58:36,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 444 transitions, 8801 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-17 15:58:36,468 INFO L231 Difference]: Finished difference. Result has 194 places, 381 transitions, 7448 flow [2023-11-17 15:58:36,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7380, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7448, PETRI_PLACES=194, PETRI_TRANSITIONS=381} [2023-11-17 15:58:36,469 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2023-11-17 15:58:36,469 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 381 transitions, 7448 flow [2023-11-17 15:58:36,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:36,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:36,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:36,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:36,674 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:36,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash -394104266, now seen corresponding path program 12 times [2023-11-17 15:58:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:36,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652081423] [2023-11-17 15:58:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:36,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652081423] [2023-11-17 15:58:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652081423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053931415] [2023-11-17 15:58:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:58:37,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:37,255 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:37,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 15:58:37,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 15:58:37,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:37,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 15:58:37,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:37,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:37,531 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:37,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053931415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:37,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:37,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2023-11-17 15:58:37,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23209851] [2023-11-17 15:58:37,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:37,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-17 15:58:37,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:37,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 381 transitions, 7448 flow. Second operand has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:37,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:37,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:37,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:38,584 INFO L124 PetriNetUnfolderBase]: 3825/5972 cut-off events. [2023-11-17 15:58:38,584 INFO L125 PetriNetUnfolderBase]: For 77974/77974 co-relation queries the response was YES. [2023-11-17 15:58:38,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47875 conditions, 5972 events. 3825/5972 cut-off events. For 77974/77974 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34477 event pairs, 640 based on Foata normal form. 2/5974 useless extension candidates. Maximal degree in co-relation 47800. Up to 3875 conditions per place. [2023-11-17 15:58:38,641 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 257 selfloop transitions, 175 changer transitions 11/443 dead transitions. [2023-11-17 15:58:38,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 443 transitions, 9088 flow [2023-11-17 15:58:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1656 transitions. [2023-11-17 15:58:38,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457202505219207 [2023-11-17 15:58:38,643 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1656 transitions. [2023-11-17 15:58:38,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1656 transitions. [2023-11-17 15:58:38,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:38,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1656 transitions. [2023-11-17 15:58:38,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.6) internal successors, (1656), 10 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:38,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:38,646 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:38,646 INFO L175 Difference]: Start difference. First operand has 194 places, 381 transitions, 7448 flow. Second operand 10 states and 1656 transitions. [2023-11-17 15:58:38,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 443 transitions, 9088 flow [2023-11-17 15:58:38,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 443 transitions, 8722 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-11-17 15:58:39,001 INFO L231 Difference]: Finished difference. Result has 190 places, 391 transitions, 7626 flow [2023-11-17 15:58:39,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7626, PETRI_PLACES=190, PETRI_TRANSITIONS=391} [2023-11-17 15:58:39,001 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 165 predicate places. [2023-11-17 15:58:39,001 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 391 transitions, 7626 flow [2023-11-17 15:58:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:39,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:39,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:39,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 15:58:39,202 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,SelfDestructingSolverStorable45 [2023-11-17 15:58:39,202 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1670468690, now seen corresponding path program 13 times [2023-11-17 15:58:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:39,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868158294] [2023-11-17 15:58:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868158294] [2023-11-17 15:58:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868158294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295341321] [2023-11-17 15:58:39,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:58:39,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:39,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:39,712 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:39,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 15:58:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:39,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 15:58:39,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:39,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:39,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:39,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:40,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:40,170 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:40,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:44,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:44,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-11-17 15:58:44,771 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:58:44,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2023-11-17 15:58:44,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:44,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-17 15:58:44,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:44,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-17 15:58:44,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:44,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-11-17 15:58:44,980 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:58:44,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1142 treesize of output 1021 [2023-11-17 15:58:44,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:44,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-17 15:58:45,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:45,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-17 15:58:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295341321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:58:45,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:58:45,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 34 [2023-11-17 15:58:45,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585682526] [2023-11-17 15:58:45,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:58:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 15:58:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 15:58:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1087, Unknown=12, NotChecked=0, Total=1260 [2023-11-17 15:58:45,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 479 [2023-11-17 15:58:45,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 391 transitions, 7626 flow. Second operand has 36 states, 36 states have (on average 125.44444444444444) internal successors, (4516), 36 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:45,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:45,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 479 [2023-11-17 15:58:45,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:47,268 INFO L124 PetriNetUnfolderBase]: 4038/6268 cut-off events. [2023-11-17 15:58:47,269 INFO L125 PetriNetUnfolderBase]: For 82658/82658 co-relation queries the response was YES. [2023-11-17 15:58:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50832 conditions, 6268 events. 4038/6268 cut-off events. For 82658/82658 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 36291 event pairs, 626 based on Foata normal form. 2/6270 useless extension candidates. Maximal degree in co-relation 50759. Up to 3889 conditions per place. [2023-11-17 15:58:47,320 INFO L140 encePairwiseOnDemand]: 464/479 looper letters, 263 selfloop transitions, 201 changer transitions 33/497 dead transitions. [2023-11-17 15:58:47,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 497 transitions, 10195 flow [2023-11-17 15:58:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 15:58:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 15:58:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2316 transitions. [2023-11-17 15:58:47,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2686151704940849 [2023-11-17 15:58:47,323 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2316 transitions. [2023-11-17 15:58:47,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2316 transitions. [2023-11-17 15:58:47,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:47,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2316 transitions. [2023-11-17 15:58:47,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 128.66666666666666) internal successors, (2316), 18 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:47,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 479.0) internal successors, (9101), 19 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:47,328 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 479.0) internal successors, (9101), 19 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:47,328 INFO L175 Difference]: Start difference. First operand has 190 places, 391 transitions, 7626 flow. Second operand 18 states and 2316 transitions. [2023-11-17 15:58:47,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 497 transitions, 10195 flow [2023-11-17 15:58:47,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 497 transitions, 9871 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-17 15:58:47,634 INFO L231 Difference]: Finished difference. Result has 205 places, 409 transitions, 8241 flow [2023-11-17 15:58:47,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7302, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8241, PETRI_PLACES=205, PETRI_TRANSITIONS=409} [2023-11-17 15:58:47,634 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2023-11-17 15:58:47,634 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 409 transitions, 8241 flow [2023-11-17 15:58:47,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 125.44444444444444) internal successors, (4516), 36 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:47,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:47,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:47,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 15:58:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:47,838 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:47,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 657786484, now seen corresponding path program 14 times [2023-11-17 15:58:47,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:47,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748236011] [2023-11-17 15:58:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:47,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:48,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:48,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748236011] [2023-11-17 15:58:48,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748236011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:48,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306677125] [2023-11-17 15:58:48,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:58:48,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:48,484 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:48,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 15:58:48,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:58:48,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:48,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 15:58:48,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:48,816 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:58:48,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2023-11-17 15:58:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:48,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:48,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306677125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:48,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:48,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-11-17 15:58:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493526837] [2023-11-17 15:58:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:58:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:58:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:58:48,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:48,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 409 transitions, 8241 flow. Second operand has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:48,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:48,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:49,916 INFO L124 PetriNetUnfolderBase]: 3993/6201 cut-off events. [2023-11-17 15:58:49,916 INFO L125 PetriNetUnfolderBase]: For 87031/87031 co-relation queries the response was YES. [2023-11-17 15:58:49,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50958 conditions, 6201 events. 3993/6201 cut-off events. For 87031/87031 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35887 event pairs, 658 based on Foata normal form. 2/6203 useless extension candidates. Maximal degree in co-relation 50881. Up to 4112 conditions per place. [2023-11-17 15:58:49,977 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 298 selfloop transitions, 155 changer transitions 5/458 dead transitions. [2023-11-17 15:58:49,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 458 transitions, 9658 flow [2023-11-17 15:58:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1656 transitions. [2023-11-17 15:58:49,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457202505219207 [2023-11-17 15:58:49,979 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1656 transitions. [2023-11-17 15:58:49,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1656 transitions. [2023-11-17 15:58:49,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:49,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1656 transitions. [2023-11-17 15:58:49,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.6) internal successors, (1656), 10 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:49,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:49,982 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:49,982 INFO L175 Difference]: Start difference. First operand has 205 places, 409 transitions, 8241 flow. Second operand 10 states and 1656 transitions. [2023-11-17 15:58:49,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 458 transitions, 9658 flow [2023-11-17 15:58:50,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 458 transitions, 9313 flow, removed 86 selfloop flow, removed 12 redundant places. [2023-11-17 15:58:50,372 INFO L231 Difference]: Finished difference. Result has 196 places, 409 transitions, 8205 flow [2023-11-17 15:58:50,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7897, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8205, PETRI_PLACES=196, PETRI_TRANSITIONS=409} [2023-11-17 15:58:50,372 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 171 predicate places. [2023-11-17 15:58:50,372 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 409 transitions, 8205 flow [2023-11-17 15:58:50,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.8181818181818) internal successors, (1780), 11 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:50,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:50,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:50,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:50,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 15:58:50,573 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:50,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:50,574 INFO L85 PathProgramCache]: Analyzing trace with hash -420577708, now seen corresponding path program 15 times [2023-11-17 15:58:50,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:50,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115443678] [2023-11-17 15:58:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:51,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:51,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115443678] [2023-11-17 15:58:51,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115443678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:51,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201036526] [2023-11-17 15:58:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:58:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:51,113 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:51,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 15:58:51,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:58:51,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:51,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 15:58:51,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:51,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:51,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:51,551 INFO L378 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 89 treesize of output 81 [2023-11-17 15:58:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:51,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201036526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:51,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:51,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-17 15:58:51,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228105249] [2023-11-17 15:58:51,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:58:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:58:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:51,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 479 [2023-11-17 15:58:51,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 409 transitions, 8205 flow. Second operand has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:51,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:51,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 479 [2023-11-17 15:58:51,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:52,810 INFO L124 PetriNetUnfolderBase]: 4012/6249 cut-off events. [2023-11-17 15:58:52,811 INFO L125 PetriNetUnfolderBase]: For 88397/88397 co-relation queries the response was YES. [2023-11-17 15:58:52,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51848 conditions, 6249 events. 4012/6249 cut-off events. For 88397/88397 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36495 event pairs, 906 based on Foata normal form. 2/6251 useless extension candidates. Maximal degree in co-relation 51775. Up to 4626 conditions per place. [2023-11-17 15:58:52,864 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 349 selfloop transitions, 99 changer transitions 14/462 dead transitions. [2023-11-17 15:58:52,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 462 transitions, 9995 flow [2023-11-17 15:58:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1566 transitions. [2023-11-17 15:58:52,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269311064718163 [2023-11-17 15:58:52,866 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1566 transitions. [2023-11-17 15:58:52,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1566 transitions. [2023-11-17 15:58:52,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:52,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1566 transitions. [2023-11-17 15:58:52,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:52,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:52,869 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:52,869 INFO L175 Difference]: Start difference. First operand has 196 places, 409 transitions, 8205 flow. Second operand 10 states and 1566 transitions. [2023-11-17 15:58:52,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 462 transitions, 9995 flow [2023-11-17 15:58:53,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 462 transitions, 9805 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-17 15:58:53,204 INFO L231 Difference]: Finished difference. Result has 201 places, 414 transitions, 8424 flow [2023-11-17 15:58:53,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8424, PETRI_PLACES=201, PETRI_TRANSITIONS=414} [2023-11-17 15:58:53,205 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 176 predicate places. [2023-11-17 15:58:53,205 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 414 transitions, 8424 flow [2023-11-17 15:58:53,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:53,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:53,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:53,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 15:58:53,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 15:58:53,410 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:53,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1772798914, now seen corresponding path program 16 times [2023-11-17 15:58:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895613026] [2023-11-17 15:58:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:54,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895613026] [2023-11-17 15:58:54,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895613026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399549004] [2023-11-17 15:58:54,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:58:54,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:54,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:54,085 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:54,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 15:58:54,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:58:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:54,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 15:58:54,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:54,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:54,436 INFO L378 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 89 treesize of output 81 [2023-11-17 15:58:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:58:54,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:58:54,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399549004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:58:54,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:58:54,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2023-11-17 15:58:54,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891883413] [2023-11-17 15:58:54,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:58:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:58:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:58:54,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:58:54,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 479 [2023-11-17 15:58:54,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 414 transitions, 8424 flow. Second operand has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:54,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:54,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 479 [2023-11-17 15:58:54,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:55,644 INFO L124 PetriNetUnfolderBase]: 3995/6218 cut-off events. [2023-11-17 15:58:55,644 INFO L125 PetriNetUnfolderBase]: For 88290/88290 co-relation queries the response was YES. [2023-11-17 15:58:55,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51212 conditions, 6218 events. 3995/6218 cut-off events. For 88290/88290 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36177 event pairs, 941 based on Foata normal form. 2/6220 useless extension candidates. Maximal degree in co-relation 51138. Up to 4622 conditions per place. [2023-11-17 15:58:55,697 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 273 selfloop transitions, 146 changer transitions 11/430 dead transitions. [2023-11-17 15:58:55,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 430 transitions, 9419 flow [2023-11-17 15:58:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:58:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:58:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1658 transitions. [2023-11-17 15:58:55,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34613778705636744 [2023-11-17 15:58:55,699 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1658 transitions. [2023-11-17 15:58:55,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1658 transitions. [2023-11-17 15:58:55,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:55,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1658 transitions. [2023-11-17 15:58:55,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.8) internal successors, (1658), 10 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:55,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:55,702 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:55,702 INFO L175 Difference]: Start difference. First operand has 201 places, 414 transitions, 8424 flow. Second operand 10 states and 1658 transitions. [2023-11-17 15:58:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 430 transitions, 9419 flow [2023-11-17 15:58:56,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 430 transitions, 9308 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-17 15:58:56,062 INFO L231 Difference]: Finished difference. Result has 202 places, 408 transitions, 8477 flow [2023-11-17 15:58:56,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8477, PETRI_PLACES=202, PETRI_TRANSITIONS=408} [2023-11-17 15:58:56,063 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 177 predicate places. [2023-11-17 15:58:56,063 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 408 transitions, 8477 flow [2023-11-17 15:58:56,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.0) internal successors, (1620), 10 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:56,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:56,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:56,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:56,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 15:58:56,264 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:56,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:56,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1987230192, now seen corresponding path program 17 times [2023-11-17 15:58:56,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:56,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979002408] [2023-11-17 15:58:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:56,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979002408] [2023-11-17 15:58:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979002408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074942056] [2023-11-17 15:58:57,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:58:57,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:57,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:57,188 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:57,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 15:58:57,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:58:57,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:57,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 15:58:57,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:57,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 15:58:57,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:58:57,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:58:57,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:58:57,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:57,712 INFO L378 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 89 treesize of output 73 [2023-11-17 15:58:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:57,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:58,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:58,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 79 [2023-11-17 15:58:58,323 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:58:58,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1416 treesize of output 1240 [2023-11-17 15:58:58,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:58,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 589 treesize of output 525 [2023-11-17 15:58:58,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 580 treesize of output 544 [2023-11-17 15:58:58,900 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 15:58:58,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 1 [2023-11-17 15:59:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:03,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074942056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:03,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:03,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-11-17 15:59:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467580838] [2023-11-17 15:59:03,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:03,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 15:59:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 15:59:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1144, Unknown=20, NotChecked=0, Total=1332 [2023-11-17 15:59:03,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 479 [2023-11-17 15:59:03,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 408 transitions, 8477 flow. Second operand has 37 states, 37 states have (on average 125.62162162162163) internal successors, (4648), 37 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:03,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:03,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 479 [2023-11-17 15:59:03,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:04,651 INFO L124 PetriNetUnfolderBase]: 3985/6192 cut-off events. [2023-11-17 15:59:04,651 INFO L125 PetriNetUnfolderBase]: For 91334/91334 co-relation queries the response was YES. [2023-11-17 15:59:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51273 conditions, 6192 events. 3985/6192 cut-off events. For 91334/91334 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35935 event pairs, 903 based on Foata normal form. 2/6194 useless extension candidates. Maximal degree in co-relation 51200. Up to 4608 conditions per place. [2023-11-17 15:59:04,701 INFO L140 encePairwiseOnDemand]: 465/479 looper letters, 330 selfloop transitions, 117 changer transitions 14/461 dead transitions. [2023-11-17 15:59:04,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 461 transitions, 10124 flow [2023-11-17 15:59:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 15:59:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 15:59:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1799 transitions. [2023-11-17 15:59:04,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26826722338204595 [2023-11-17 15:59:04,703 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1799 transitions. [2023-11-17 15:59:04,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1799 transitions. [2023-11-17 15:59:04,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:04,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1799 transitions. [2023-11-17 15:59:04,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:04,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 479.0) internal successors, (7185), 15 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:04,707 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 479.0) internal successors, (7185), 15 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:04,707 INFO L175 Difference]: Start difference. First operand has 202 places, 408 transitions, 8477 flow. Second operand 14 states and 1799 transitions. [2023-11-17 15:59:04,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 461 transitions, 10124 flow [2023-11-17 15:59:05,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 461 transitions, 9904 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-17 15:59:05,059 INFO L231 Difference]: Finished difference. Result has 207 places, 400 transitions, 8276 flow [2023-11-17 15:59:05,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=8257, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8276, PETRI_PLACES=207, PETRI_TRANSITIONS=400} [2023-11-17 15:59:05,059 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 182 predicate places. [2023-11-17 15:59:05,060 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 400 transitions, 8276 flow [2023-11-17 15:59:05,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 125.62162162162163) internal successors, (4648), 37 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:05,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:05,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:05,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-17 15:59:05,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-11-17 15:59:05,265 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:05,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:05,265 INFO L85 PathProgramCache]: Analyzing trace with hash -327290467, now seen corresponding path program 1 times [2023-11-17 15:59:05,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:05,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541942608] [2023-11-17 15:59:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:59:05,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541942608] [2023-11-17 15:59:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541942608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937582665] [2023-11-17 15:59:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:05,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:05,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:05,419 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:05,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 15:59:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:05,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 15:59:05,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:05,562 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:59:05,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-17 15:59:05,576 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:59:05,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 15:59:05,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:59:05,649 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:59:05,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 15:59:05,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:59:05,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:59:05,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:59:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:05,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:59:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937582665] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:05,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:59:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 23 [2023-11-17 15:59:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351915905] [2023-11-17 15:59:05,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:59:05,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:59:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:59:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:59:05,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 479 [2023-11-17 15:59:05,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 400 transitions, 8276 flow. Second operand has 6 states, 6 states have (on average 185.5) internal successors, (1113), 6 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:05,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:05,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 479 [2023-11-17 15:59:05,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:07,028 INFO L124 PetriNetUnfolderBase]: 4137/6414 cut-off events. [2023-11-17 15:59:07,028 INFO L125 PetriNetUnfolderBase]: For 98691/98691 co-relation queries the response was YES. [2023-11-17 15:59:07,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54294 conditions, 6414 events. 4137/6414 cut-off events. For 98691/98691 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 37448 event pairs, 1011 based on Foata normal form. 31/6445 useless extension candidates. Maximal degree in co-relation 54221. Up to 5314 conditions per place. [2023-11-17 15:59:07,089 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 366 selfloop transitions, 86 changer transitions 0/452 dead transitions. [2023-11-17 15:59:07,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 452 transitions, 10197 flow [2023-11-17 15:59:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:59:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:59:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1147 transitions. [2023-11-17 15:59:07,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990953375086987 [2023-11-17 15:59:07,091 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1147 transitions. [2023-11-17 15:59:07,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1147 transitions. [2023-11-17 15:59:07,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:07,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1147 transitions. [2023-11-17 15:59:07,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.16666666666666) internal successors, (1147), 6 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:07,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:07,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:07,093 INFO L175 Difference]: Start difference. First operand has 207 places, 400 transitions, 8276 flow. Second operand 6 states and 1147 transitions. [2023-11-17 15:59:07,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 452 transitions, 10197 flow [2023-11-17 15:59:07,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 452 transitions, 9641 flow, removed 3 selfloop flow, removed 15 redundant places. [2023-11-17 15:59:07,512 INFO L231 Difference]: Finished difference. Result has 192 places, 411 transitions, 8345 flow [2023-11-17 15:59:07,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7774, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8345, PETRI_PLACES=192, PETRI_TRANSITIONS=411} [2023-11-17 15:59:07,512 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2023-11-17 15:59:07,512 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 411 transitions, 8345 flow [2023-11-17 15:59:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.5) internal successors, (1113), 6 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:07,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:07,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:07,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-17 15:59:07,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:07,713 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:07,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1150650097, now seen corresponding path program 2 times [2023-11-17 15:59:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:07,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125276198] [2023-11-17 15:59:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:07,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125276198] [2023-11-17 15:59:07,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125276198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597191582] [2023-11-17 15:59:07,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:59:07,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:07,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:07,909 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:07,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 15:59:08,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:59:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:59:08,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 15:59:08,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:08,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:08,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 97 [2023-11-17 15:59:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:08,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:08,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:08,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:59:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:09,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597191582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:09,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:09,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 15:59:09,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053588584] [2023-11-17 15:59:09,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:09,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 15:59:09,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 15:59:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2023-11-17 15:59:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:59:09,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 411 transitions, 8345 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:09,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:09,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:59:09,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:11,368 INFO L124 PetriNetUnfolderBase]: 5364/8678 cut-off events. [2023-11-17 15:59:11,368 INFO L125 PetriNetUnfolderBase]: For 114186/114186 co-relation queries the response was YES. [2023-11-17 15:59:11,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69659 conditions, 8678 events. 5364/8678 cut-off events. For 114186/114186 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 56571 event pairs, 512 based on Foata normal form. 219/8897 useless extension candidates. Maximal degree in co-relation 69587. Up to 2715 conditions per place. [2023-11-17 15:59:11,453 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 604 selfloop transitions, 375 changer transitions 31/1010 dead transitions. [2023-11-17 15:59:11,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1010 transitions, 20065 flow [2023-11-17 15:59:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 15:59:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 15:59:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3901 transitions. [2023-11-17 15:59:11,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33933542101600556 [2023-11-17 15:59:11,471 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3901 transitions. [2023-11-17 15:59:11,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3901 transitions. [2023-11-17 15:59:11,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:11,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3901 transitions. [2023-11-17 15:59:11,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 162.54166666666666) internal successors, (3901), 24 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:11,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:11,478 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:11,478 INFO L175 Difference]: Start difference. First operand has 192 places, 411 transitions, 8345 flow. Second operand 24 states and 3901 transitions. [2023-11-17 15:59:11,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1010 transitions, 20065 flow [2023-11-17 15:59:12,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1010 transitions, 19822 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-11-17 15:59:12,233 INFO L231 Difference]: Finished difference. Result has 222 places, 562 transitions, 12486 flow [2023-11-17 15:59:12,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12486, PETRI_PLACES=222, PETRI_TRANSITIONS=562} [2023-11-17 15:59:12,234 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 197 predicate places. [2023-11-17 15:59:12,234 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 562 transitions, 12486 flow [2023-11-17 15:59:12,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:12,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:12,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:12,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 15:59:12,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:12,440 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:12,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1785002803, now seen corresponding path program 2 times [2023-11-17 15:59:12,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:12,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088185767] [2023-11-17 15:59:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:59:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088185767] [2023-11-17 15:59:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088185767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:59:12,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:59:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 15:59:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597680215] [2023-11-17 15:59:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:59:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:59:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:59:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 15:59:12,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 15:59:12,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 562 transitions, 12486 flow. Second operand has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:12,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:12,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 15:59:12,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:14,663 INFO L124 PetriNetUnfolderBase]: 5514/9079 cut-off events. [2023-11-17 15:59:14,663 INFO L125 PetriNetUnfolderBase]: For 157433/157433 co-relation queries the response was YES. [2023-11-17 15:59:14,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78451 conditions, 9079 events. 5514/9079 cut-off events. For 157433/157433 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 61783 event pairs, 1369 based on Foata normal form. 88/9167 useless extension candidates. Maximal degree in co-relation 78370. Up to 6242 conditions per place. [2023-11-17 15:59:14,757 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 481 selfloop transitions, 159 changer transitions 31/671 dead transitions. [2023-11-17 15:59:14,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 671 transitions, 16100 flow [2023-11-17 15:59:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:59:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:59:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1808 transitions. [2023-11-17 15:59:14,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774530271398747 [2023-11-17 15:59:14,758 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1808 transitions. [2023-11-17 15:59:14,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1808 transitions. [2023-11-17 15:59:14,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:14,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1808 transitions. [2023-11-17 15:59:14,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 180.8) internal successors, (1808), 10 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:14,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:14,762 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:14,762 INFO L175 Difference]: Start difference. First operand has 222 places, 562 transitions, 12486 flow. Second operand 10 states and 1808 transitions. [2023-11-17 15:59:14,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 671 transitions, 16100 flow [2023-11-17 15:59:15,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 671 transitions, 15874 flow, removed 108 selfloop flow, removed 6 redundant places. [2023-11-17 15:59:15,821 INFO L231 Difference]: Finished difference. Result has 227 places, 576 transitions, 13143 flow [2023-11-17 15:59:15,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=12290, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13143, PETRI_PLACES=227, PETRI_TRANSITIONS=576} [2023-11-17 15:59:15,822 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 202 predicate places. [2023-11-17 15:59:15,822 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 576 transitions, 13143 flow [2023-11-17 15:59:15,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:15,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:15,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:15,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-11-17 15:59:15,823 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:15,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1654474924, now seen corresponding path program 3 times [2023-11-17 15:59:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:15,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835855703] [2023-11-17 15:59:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:16,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:16,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835855703] [2023-11-17 15:59:16,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835855703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:16,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843979406] [2023-11-17 15:59:16,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:59:16,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:16,043 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:16,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 15:59:16,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:59:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:59:16,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:59:16,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:16,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:16,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:16,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:59:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:17,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843979406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:17,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:17,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 15:59:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023778086] [2023-11-17 15:59:17,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:17,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 15:59:17,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 15:59:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 15:59:17,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:59:17,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 576 transitions, 13143 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:17,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:17,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:59:17,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:21,358 INFO L124 PetriNetUnfolderBase]: 7237/11809 cut-off events. [2023-11-17 15:59:21,358 INFO L125 PetriNetUnfolderBase]: For 203038/203038 co-relation queries the response was YES. [2023-11-17 15:59:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102025 conditions, 11809 events. 7237/11809 cut-off events. For 203038/203038 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 81689 event pairs, 1127 based on Foata normal form. 158/11967 useless extension candidates. Maximal degree in co-relation 101941. Up to 3730 conditions per place. [2023-11-17 15:59:21,484 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 1077 selfloop transitions, 548 changer transitions 42/1667 dead transitions. [2023-11-17 15:59:21,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1667 transitions, 36908 flow [2023-11-17 15:59:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 15:59:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 15:59:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 6316 transitions. [2023-11-17 15:59:21,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33809753225202077 [2023-11-17 15:59:21,489 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 6316 transitions. [2023-11-17 15:59:21,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 6316 transitions. [2023-11-17 15:59:21,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:21,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 6316 transitions. [2023-11-17 15:59:21,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 161.94871794871796) internal successors, (6316), 39 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:21,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 479.0) internal successors, (19160), 40 states have internal predecessors, (19160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:21,502 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 479.0) internal successors, (19160), 40 states have internal predecessors, (19160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:21,502 INFO L175 Difference]: Start difference. First operand has 227 places, 576 transitions, 13143 flow. Second operand 39 states and 6316 transitions. [2023-11-17 15:59:21,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1667 transitions, 36908 flow [2023-11-17 15:59:23,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1667 transitions, 35977 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-11-17 15:59:23,161 INFO L231 Difference]: Finished difference. Result has 275 places, 803 transitions, 19964 flow [2023-11-17 15:59:23,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=12866, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=19964, PETRI_PLACES=275, PETRI_TRANSITIONS=803} [2023-11-17 15:59:23,161 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2023-11-17 15:59:23,161 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 803 transitions, 19964 flow [2023-11-17 15:59:23,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:23,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:23,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:23,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-17 15:59:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-17 15:59:23,363 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:23,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1053289795, now seen corresponding path program 3 times [2023-11-17 15:59:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:23,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543773365] [2023-11-17 15:59:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:59:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:23,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543773365] [2023-11-17 15:59:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543773365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:59:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:59:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 15:59:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448586316] [2023-11-17 15:59:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:59:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:59:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:59:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-17 15:59:23,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 15:59:23,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 803 transitions, 19964 flow. Second operand has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:23,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:23,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 15:59:23,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:26,650 INFO L124 PetriNetUnfolderBase]: 7263/11855 cut-off events. [2023-11-17 15:59:26,650 INFO L125 PetriNetUnfolderBase]: For 257392/257392 co-relation queries the response was YES. [2023-11-17 15:59:26,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109451 conditions, 11855 events. 7263/11855 cut-off events. For 257392/257392 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 82655 event pairs, 1961 based on Foata normal form. 56/11911 useless extension candidates. Maximal degree in co-relation 109350. Up to 8840 conditions per place. [2023-11-17 15:59:26,854 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 626 selfloop transitions, 230 changer transitions 0/856 dead transitions. [2023-11-17 15:59:26,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 856 transitions, 22806 flow [2023-11-17 15:59:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:59:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:59:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1443 transitions. [2023-11-17 15:59:26,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37656576200417535 [2023-11-17 15:59:26,856 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1443 transitions. [2023-11-17 15:59:26,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1443 transitions. [2023-11-17 15:59:26,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:26,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1443 transitions. [2023-11-17 15:59:26,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.375) internal successors, (1443), 8 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:26,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:26,858 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:26,859 INFO L175 Difference]: Start difference. First operand has 275 places, 803 transitions, 19964 flow. Second operand 8 states and 1443 transitions. [2023-11-17 15:59:26,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 856 transitions, 22806 flow [2023-11-17 15:59:28,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 856 transitions, 21839 flow, removed 314 selfloop flow, removed 18 redundant places. [2023-11-17 15:59:28,831 INFO L231 Difference]: Finished difference. Result has 260 places, 805 transitions, 19559 flow [2023-11-17 15:59:28,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19034, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19559, PETRI_PLACES=260, PETRI_TRANSITIONS=805} [2023-11-17 15:59:28,832 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 235 predicate places. [2023-11-17 15:59:28,832 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 805 transitions, 19559 flow [2023-11-17 15:59:28,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:28,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:28,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-11-17 15:59:28,833 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:28,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1368605972, now seen corresponding path program 4 times [2023-11-17 15:59:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935688856] [2023-11-17 15:59:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:59:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:29,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935688856] [2023-11-17 15:59:29,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935688856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:29,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522489347] [2023-11-17 15:59:29,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:59:29,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:29,056 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 15:59:29,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:59:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:59:29,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 15:59:29,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:29,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:29,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 99 [2023-11-17 15:59:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:59:29,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:29,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:29,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:59:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:59:30,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522489347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:30,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:30,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 15:59:30,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324741545] [2023-11-17 15:59:30,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:30,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 15:59:30,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 15:59:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 15:59:30,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:59:30,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 805 transitions, 19559 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:30,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:30,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:59:30,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:33,976 INFO L124 PetriNetUnfolderBase]: 7273/11891 cut-off events. [2023-11-17 15:59:33,976 INFO L125 PetriNetUnfolderBase]: For 247165/247165 co-relation queries the response was YES. [2023-11-17 15:59:34,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107817 conditions, 11891 events. 7273/11891 cut-off events. For 247165/247165 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 82753 event pairs, 1316 based on Foata normal form. 2/11893 useless extension candidates. Maximal degree in co-relation 107721. Up to 3796 conditions per place. [2023-11-17 15:59:34,103 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 869 selfloop transitions, 382 changer transitions 30/1281 dead transitions. [2023-11-17 15:59:34,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1281 transitions, 30563 flow [2023-11-17 15:59:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 15:59:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 15:59:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4196 transitions. [2023-11-17 15:59:34,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3369198651035812 [2023-11-17 15:59:34,106 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4196 transitions. [2023-11-17 15:59:34,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4196 transitions. [2023-11-17 15:59:34,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:34,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4196 transitions. [2023-11-17 15:59:34,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 161.3846153846154) internal successors, (4196), 26 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:34,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:34,114 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:34,114 INFO L175 Difference]: Start difference. First operand has 260 places, 805 transitions, 19559 flow. Second operand 26 states and 4196 transitions. [2023-11-17 15:59:34,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1281 transitions, 30563 flow [2023-11-17 15:59:35,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1281 transitions, 29769 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-17 15:59:36,012 INFO L231 Difference]: Finished difference. Result has 285 places, 805 transitions, 19926 flow [2023-11-17 15:59:36,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19131, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19926, PETRI_PLACES=285, PETRI_TRANSITIONS=805} [2023-11-17 15:59:36,013 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 260 predicate places. [2023-11-17 15:59:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 805 transitions, 19926 flow [2023-11-17 15:59:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:36,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:36,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:36,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 15:59:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-17 15:59:36,215 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1764393065, now seen corresponding path program 4 times [2023-11-17 15:59:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611604683] [2023-11-17 15:59:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:59:36,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611604683] [2023-11-17 15:59:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611604683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:59:36,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:59:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 15:59:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143990959] [2023-11-17 15:59:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:59:36,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:59:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:59:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-17 15:59:36,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 15:59:36,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 805 transitions, 19926 flow. Second operand has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:36,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:36,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 15:59:36,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:39,589 INFO L124 PetriNetUnfolderBase]: 7167/11749 cut-off events. [2023-11-17 15:59:39,589 INFO L125 PetriNetUnfolderBase]: For 255289/255289 co-relation queries the response was YES. [2023-11-17 15:59:39,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107288 conditions, 11749 events. 7167/11749 cut-off events. For 255289/255289 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 82123 event pairs, 1955 based on Foata normal form. 64/11813 useless extension candidates. Maximal degree in co-relation 107187. Up to 8798 conditions per place. [2023-11-17 15:59:39,722 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 608 selfloop transitions, 230 changer transitions 0/838 dead transitions. [2023-11-17 15:59:39,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 838 transitions, 22272 flow [2023-11-17 15:59:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:59:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:59:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1442 transitions. [2023-11-17 15:59:39,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763048016701461 [2023-11-17 15:59:39,723 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1442 transitions. [2023-11-17 15:59:39,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1442 transitions. [2023-11-17 15:59:39,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:39,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1442 transitions. [2023-11-17 15:59:39,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:39,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:39,726 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:39,726 INFO L175 Difference]: Start difference. First operand has 285 places, 805 transitions, 19926 flow. Second operand 8 states and 1442 transitions. [2023-11-17 15:59:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 838 transitions, 22272 flow [2023-11-17 15:59:41,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 838 transitions, 21723 flow, removed 29 selfloop flow, removed 19 redundant places. [2023-11-17 15:59:41,746 INFO L231 Difference]: Finished difference. Result has 270 places, 795 transitions, 19651 flow [2023-11-17 15:59:41,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19153, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19651, PETRI_PLACES=270, PETRI_TRANSITIONS=795} [2023-11-17 15:59:41,747 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 245 predicate places. [2023-11-17 15:59:41,747 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 795 transitions, 19651 flow [2023-11-17 15:59:41,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:41,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:41,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-11-17 15:59:41,747 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:41,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1872430799, now seen corresponding path program 5 times [2023-11-17 15:59:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:41,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283088395] [2023-11-17 15:59:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:59:41,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:41,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283088395] [2023-11-17 15:59:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283088395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629128313] [2023-11-17 15:59:41,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:59:41,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:41,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:41,943 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:41,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 15:59:42,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:59:42,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:59:42,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 15:59:42,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:42,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:42,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 99 [2023-11-17 15:59:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:59:42,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:42,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:42,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:59:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:59:42,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629128313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:42,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:42,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 15:59:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020681974] [2023-11-17 15:59:42,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 15:59:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 15:59:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2023-11-17 15:59:42,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:59:42,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 795 transitions, 19651 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:42,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:42,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:59:42,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:46,497 INFO L124 PetriNetUnfolderBase]: 7187/11821 cut-off events. [2023-11-17 15:59:46,498 INFO L125 PetriNetUnfolderBase]: For 251960/251960 co-relation queries the response was YES. [2023-11-17 15:59:46,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108424 conditions, 11821 events. 7187/11821 cut-off events. For 251960/251960 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 83133 event pairs, 1208 based on Foata normal form. 4/11825 useless extension candidates. Maximal degree in co-relation 108324. Up to 3800 conditions per place. [2023-11-17 15:59:46,638 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 777 selfloop transitions, 368 changer transitions 23/1168 dead transitions. [2023-11-17 15:59:46,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1168 transitions, 28557 flow [2023-11-17 15:59:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 15:59:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 15:59:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3399 transitions. [2023-11-17 15:59:46,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33790635252013124 [2023-11-17 15:59:46,641 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3399 transitions. [2023-11-17 15:59:46,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3399 transitions. [2023-11-17 15:59:46,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:46,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3399 transitions. [2023-11-17 15:59:46,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 161.85714285714286) internal successors, (3399), 21 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:46,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:46,648 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 479.0) internal successors, (10538), 22 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:46,648 INFO L175 Difference]: Start difference. First operand has 270 places, 795 transitions, 19651 flow. Second operand 21 states and 3399 transitions. [2023-11-17 15:59:46,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1168 transitions, 28557 flow [2023-11-17 15:59:48,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1168 transitions, 28045 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-17 15:59:48,765 INFO L231 Difference]: Finished difference. Result has 289 places, 793 transitions, 20092 flow [2023-11-17 15:59:48,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19345, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20092, PETRI_PLACES=289, PETRI_TRANSITIONS=793} [2023-11-17 15:59:48,765 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 264 predicate places. [2023-11-17 15:59:48,766 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 793 transitions, 20092 flow [2023-11-17 15:59:48,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:48,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:48,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:48,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-17 15:59:48,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-17 15:59:48,967 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:48,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1096284167, now seen corresponding path program 6 times [2023-11-17 15:59:48,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:48,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58841226] [2023-11-17 15:59:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:49,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58841226] [2023-11-17 15:59:49,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58841226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:49,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304139920] [2023-11-17 15:59:49,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:59:49,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:49,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:49,169 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:49,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 15:59:49,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 15:59:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:59:49,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 15:59:49,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:49,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:49,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-17 15:59:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:49,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:49,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:49,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:59:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304139920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:50,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:50,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 15:59:50,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693809063] [2023-11-17 15:59:50,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:50,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 15:59:50,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:50,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 15:59:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-17 15:59:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:59:50,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 793 transitions, 20092 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:50,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:50,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:59:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:59:54,465 INFO L124 PetriNetUnfolderBase]: 7178/11846 cut-off events. [2023-11-17 15:59:54,465 INFO L125 PetriNetUnfolderBase]: For 259954/259954 co-relation queries the response was YES. [2023-11-17 15:59:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109613 conditions, 11846 events. 7178/11846 cut-off events. For 259954/259954 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 83808 event pairs, 980 based on Foata normal form. 4/11850 useless extension candidates. Maximal degree in co-relation 109509. Up to 3821 conditions per place. [2023-11-17 15:59:54,619 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 771 selfloop transitions, 469 changer transitions 15/1255 dead transitions. [2023-11-17 15:59:54,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1255 transitions, 29919 flow [2023-11-17 15:59:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 15:59:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 15:59:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4216 transitions. [2023-11-17 15:59:54,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33852577485145335 [2023-11-17 15:59:54,622 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4216 transitions. [2023-11-17 15:59:54,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4216 transitions. [2023-11-17 15:59:54,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:59:54,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4216 transitions. [2023-11-17 15:59:54,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 162.15384615384616) internal successors, (4216), 26 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:54,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:54,631 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:54,631 INFO L175 Difference]: Start difference. First operand has 289 places, 793 transitions, 20092 flow. Second operand 26 states and 4216 transitions. [2023-11-17 15:59:54,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1255 transitions, 29919 flow [2023-11-17 15:59:57,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1255 transitions, 29137 flow, removed 42 selfloop flow, removed 17 redundant places. [2023-11-17 15:59:57,092 INFO L231 Difference]: Finished difference. Result has 296 places, 795 transitions, 20326 flow [2023-11-17 15:59:57,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19348, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20326, PETRI_PLACES=296, PETRI_TRANSITIONS=795} [2023-11-17 15:59:57,093 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 271 predicate places. [2023-11-17 15:59:57,093 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 795 transitions, 20326 flow [2023-11-17 15:59:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:57,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:59:57,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:59:57,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-17 15:59:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:57,299 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:59:57,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:59:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash 665423468, now seen corresponding path program 7 times [2023-11-17 15:59:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:59:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285882863] [2023-11-17 15:59:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:59:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:59:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:57,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:59:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285882863] [2023-11-17 15:59:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285882863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:59:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988656537] [2023-11-17 15:59:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:59:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:59:57,513 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:59:57,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 15:59:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:59:57,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:59:57,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:59:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:57,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:59:58,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:59:58,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 15:59:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:59:58,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988656537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:59:58,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:59:58,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 15:59:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751023280] [2023-11-17 15:59:58,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:59:58,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 15:59:58,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:59:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 15:59:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 15:59:58,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 15:59:58,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 795 transitions, 20326 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:59:58,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:59:58,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 15:59:58,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:03,303 INFO L124 PetriNetUnfolderBase]: 7233/11995 cut-off events. [2023-11-17 16:00:03,303 INFO L125 PetriNetUnfolderBase]: For 271405/271405 co-relation queries the response was YES. [2023-11-17 16:00:03,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111421 conditions, 11995 events. 7233/11995 cut-off events. For 271405/271405 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 85821 event pairs, 1154 based on Foata normal form. 4/11999 useless extension candidates. Maximal degree in co-relation 111317. Up to 3872 conditions per place. [2023-11-17 16:00:03,654 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 1147 selfloop transitions, 539 changer transitions 26/1712 dead transitions. [2023-11-17 16:00:03,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1712 transitions, 40085 flow [2023-11-17 16:00:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:00:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:00:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6475 transitions. [2023-11-17 16:00:03,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3379436325678497 [2023-11-17 16:00:03,659 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6475 transitions. [2023-11-17 16:00:03,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6475 transitions. [2023-11-17 16:00:03,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:03,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6475 transitions. [2023-11-17 16:00:03,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 161.875) internal successors, (6475), 40 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:03,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 479.0) internal successors, (19639), 41 states have internal predecessors, (19639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:03,674 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 479.0) internal successors, (19639), 41 states have internal predecessors, (19639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:03,674 INFO L175 Difference]: Start difference. First operand has 296 places, 795 transitions, 20326 flow. Second operand 40 states and 6475 transitions. [2023-11-17 16:00:03,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1712 transitions, 40085 flow [2023-11-17 16:00:06,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1712 transitions, 39251 flow, removed 6 selfloop flow, removed 18 redundant places. [2023-11-17 16:00:06,340 INFO L231 Difference]: Finished difference. Result has 320 places, 800 transitions, 20823 flow [2023-11-17 16:00:06,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19605, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20823, PETRI_PLACES=320, PETRI_TRANSITIONS=800} [2023-11-17 16:00:06,341 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2023-11-17 16:00:06,341 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 800 transitions, 20823 flow [2023-11-17 16:00:06,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:06,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:00:06,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:00:06,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 16:00:06,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:06,547 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:00:06,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:00:06,547 INFO L85 PathProgramCache]: Analyzing trace with hash -829868668, now seen corresponding path program 8 times [2023-11-17 16:00:06,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:00:06,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368035993] [2023-11-17 16:00:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:00:06,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:00:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:00:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:00:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368035993] [2023-11-17 16:00:06,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368035993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:00:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151012571] [2023-11-17 16:00:06,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:00:06,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:00:06,867 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:00:06,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 16:00:07,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:00:07,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:00:07,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:00:07,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:00:07,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:07,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 99 [2023-11-17 16:00:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:00:07,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:00:07,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:07,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:00:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:00:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151012571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:00:08,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:00:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:00:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985171600] [2023-11-17 16:00:08,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:00:08,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:00:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:00:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:00:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:00:08,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:00:08,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 800 transitions, 20823 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:08,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:00:08,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:00:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:12,153 INFO L124 PetriNetUnfolderBase]: 7209/11949 cut-off events. [2023-11-17 16:00:12,153 INFO L125 PetriNetUnfolderBase]: For 278476/278476 co-relation queries the response was YES. [2023-11-17 16:00:12,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111523 conditions, 11949 events. 7209/11949 cut-off events. For 278476/278476 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 85098 event pairs, 1154 based on Foata normal form. 2/11951 useless extension candidates. Maximal degree in co-relation 111416. Up to 3868 conditions per place. [2023-11-17 16:00:12,293 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 793 selfloop transitions, 472 changer transitions 44/1309 dead transitions. [2023-11-17 16:00:12,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1309 transitions, 32068 flow [2023-11-17 16:00:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:00:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:00:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4209 transitions. [2023-11-17 16:00:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3379637064396981 [2023-11-17 16:00:12,296 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4209 transitions. [2023-11-17 16:00:12,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4209 transitions. [2023-11-17 16:00:12,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:12,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4209 transitions. [2023-11-17 16:00:12,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 161.8846153846154) internal successors, (4209), 26 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:12,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:12,304 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:12,304 INFO L175 Difference]: Start difference. First operand has 320 places, 800 transitions, 20823 flow. Second operand 26 states and 4209 transitions. [2023-11-17 16:00:12,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1309 transitions, 32068 flow [2023-11-17 16:00:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1309 transitions, 31211 flow, removed 8 selfloop flow, removed 32 redundant places. [2023-11-17 16:00:14,938 INFO L231 Difference]: Finished difference. Result has 312 places, 772 transitions, 20280 flow [2023-11-17 16:00:14,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19978, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20280, PETRI_PLACES=312, PETRI_TRANSITIONS=772} [2023-11-17 16:00:14,939 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 287 predicate places. [2023-11-17 16:00:14,939 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 772 transitions, 20280 flow [2023-11-17 16:00:14,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:14,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:00:14,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:00:14,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-17 16:00:15,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:15,140 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:00:15,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:00:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -925645564, now seen corresponding path program 9 times [2023-11-17 16:00:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:00:15,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621514171] [2023-11-17 16:00:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:00:15,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:00:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:15,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:00:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621514171] [2023-11-17 16:00:15,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621514171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:00:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583125416] [2023-11-17 16:00:15,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:00:15,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:00:15,367 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:00:15,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 16:00:15,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:00:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:00:15,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:00:15,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:00:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:15,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:00:16,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:16,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:00:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:16,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583125416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:00:16,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:00:16,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:00:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229741443] [2023-11-17 16:00:16,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:00:16,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:00:16,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:00:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:00:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:00:16,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:00:16,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 772 transitions, 20280 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:16,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:00:16,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:00:16,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:21,012 INFO L124 PetriNetUnfolderBase]: 7069/11830 cut-off events. [2023-11-17 16:00:21,012 INFO L125 PetriNetUnfolderBase]: For 285072/285072 co-relation queries the response was YES. [2023-11-17 16:00:21,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110863 conditions, 11830 events. 7069/11830 cut-off events. For 285072/285072 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 85449 event pairs, 1186 based on Foata normal form. 173/12003 useless extension candidates. Maximal degree in co-relation 110757. Up to 3882 conditions per place. [2023-11-17 16:00:21,155 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 775 selfloop transitions, 550 changer transitions 26/1351 dead transitions. [2023-11-17 16:00:21,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1351 transitions, 33007 flow [2023-11-17 16:00:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:00:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:00:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4532 transitions. [2023-11-17 16:00:21,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33790635252013124 [2023-11-17 16:00:21,158 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4532 transitions. [2023-11-17 16:00:21,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4532 transitions. [2023-11-17 16:00:21,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:21,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4532 transitions. [2023-11-17 16:00:21,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 161.85714285714286) internal successors, (4532), 28 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:21,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 479.0) internal successors, (13891), 29 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:21,166 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 479.0) internal successors, (13891), 29 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:21,166 INFO L175 Difference]: Start difference. First operand has 312 places, 772 transitions, 20280 flow. Second operand 28 states and 4532 transitions. [2023-11-17 16:00:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1351 transitions, 33007 flow [2023-11-17 16:00:23,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1351 transitions, 32122 flow, removed 36 selfloop flow, removed 24 redundant places. [2023-11-17 16:00:23,715 INFO L231 Difference]: Finished difference. Result has 322 places, 839 transitions, 22483 flow [2023-11-17 16:00:23,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19517, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22483, PETRI_PLACES=322, PETRI_TRANSITIONS=839} [2023-11-17 16:00:23,716 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2023-11-17 16:00:23,716 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 839 transitions, 22483 flow [2023-11-17 16:00:23,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:23,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:00:23,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:00:23,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-17 16:00:23,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-17 16:00:23,922 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:00:23,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:00:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash 347934498, now seen corresponding path program 10 times [2023-11-17 16:00:23,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:00:23,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731042923] [2023-11-17 16:00:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:00:23,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:00:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:24,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:00:24,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731042923] [2023-11-17 16:00:24,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731042923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:00:24,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615612290] [2023-11-17 16:00:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:00:24,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:00:24,239 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:00:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 16:00:24,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:00:24,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:00:24,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:00:24,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:00:24,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:24,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 97 [2023-11-17 16:00:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:24,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:00:24,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:24,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:00:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:25,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615612290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:00:25,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:00:25,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:00:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283458193] [2023-11-17 16:00:25,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:00:25,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:00:25,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:00:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:00:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:00:25,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:00:25,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 839 transitions, 22483 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:25,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:00:25,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:00:25,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:30,008 INFO L124 PetriNetUnfolderBase]: 7023/11773 cut-off events. [2023-11-17 16:00:30,008 INFO L125 PetriNetUnfolderBase]: For 309106/309106 co-relation queries the response was YES. [2023-11-17 16:00:30,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115007 conditions, 11773 events. 7023/11773 cut-off events. For 309106/309106 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 85096 event pairs, 1188 based on Foata normal form. 1/11774 useless extension candidates. Maximal degree in co-relation 114892. Up to 3878 conditions per place. [2023-11-17 16:00:30,149 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 842 selfloop transitions, 504 changer transitions 20/1366 dead transitions. [2023-11-17 16:00:30,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1366 transitions, 33897 flow [2023-11-17 16:00:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:00:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:00:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5010 transitions. [2023-11-17 16:00:30,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33739645767391746 [2023-11-17 16:00:30,152 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5010 transitions. [2023-11-17 16:00:30,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5010 transitions. [2023-11-17 16:00:30,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:30,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5010 transitions. [2023-11-17 16:00:30,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 161.61290322580646) internal successors, (5010), 31 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:30,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 479.0) internal successors, (15328), 32 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:30,161 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 479.0) internal successors, (15328), 32 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:30,161 INFO L175 Difference]: Start difference. First operand has 322 places, 839 transitions, 22483 flow. Second operand 31 states and 5010 transitions. [2023-11-17 16:00:30,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1366 transitions, 33897 flow [2023-11-17 16:00:33,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1366 transitions, 32739 flow, removed 171 selfloop flow, removed 18 redundant places. [2023-11-17 16:00:33,653 INFO L231 Difference]: Finished difference. Result has 333 places, 834 transitions, 22216 flow [2023-11-17 16:00:33,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=21357, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=22216, PETRI_PLACES=333, PETRI_TRANSITIONS=834} [2023-11-17 16:00:33,654 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 308 predicate places. [2023-11-17 16:00:33,654 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 834 transitions, 22216 flow [2023-11-17 16:00:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:00:33,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:00:33,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-17 16:00:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-17 16:00:33,857 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:00:33,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:00:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1968756698, now seen corresponding path program 11 times [2023-11-17 16:00:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:00:33,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519108089] [2023-11-17 16:00:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:00:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:00:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:00:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519108089] [2023-11-17 16:00:34,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519108089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:00:34,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377631743] [2023-11-17 16:00:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:00:34,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:00:34,064 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:00:34,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-17 16:00:34,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:00:34,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:00:34,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 16:00:34,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:00:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:34,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:00:34,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:34,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:00:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:34,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377631743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:00:34,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:00:34,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:00:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893214843] [2023-11-17 16:00:34,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:00:34,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:00:34,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:00:34,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:00:34,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:00:34,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:00:34,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 834 transitions, 22216 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:34,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:00:34,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:00:34,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:39,873 INFO L124 PetriNetUnfolderBase]: 7108/11970 cut-off events. [2023-11-17 16:00:39,873 INFO L125 PetriNetUnfolderBase]: For 298656/298656 co-relation queries the response was YES. [2023-11-17 16:00:40,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114606 conditions, 11970 events. 7108/11970 cut-off events. For 298656/298656 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 87544 event pairs, 1182 based on Foata normal form. 2/11972 useless extension candidates. Maximal degree in co-relation 114495. Up to 3948 conditions per place. [2023-11-17 16:00:40,223 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 1134 selfloop transitions, 581 changer transitions 23/1738 dead transitions. [2023-11-17 16:00:40,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1738 transitions, 42318 flow [2023-11-17 16:00:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:00:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:00:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6459 transitions. [2023-11-17 16:00:40,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371085594989562 [2023-11-17 16:00:40,227 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6459 transitions. [2023-11-17 16:00:40,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6459 transitions. [2023-11-17 16:00:40,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:40,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6459 transitions. [2023-11-17 16:00:40,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 161.475) internal successors, (6459), 40 states have internal predecessors, (6459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:40,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 479.0) internal successors, (19639), 41 states have internal predecessors, (19639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:40,239 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 479.0) internal successors, (19639), 41 states have internal predecessors, (19639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:40,239 INFO L175 Difference]: Start difference. First operand has 333 places, 834 transitions, 22216 flow. Second operand 40 states and 6459 transitions. [2023-11-17 16:00:40,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1738 transitions, 42318 flow [2023-11-17 16:00:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1738 transitions, 41580 flow, removed 8 selfloop flow, removed 22 redundant places. [2023-11-17 16:00:43,066 INFO L231 Difference]: Finished difference. Result has 354 places, 858 transitions, 23168 flow [2023-11-17 16:00:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=21500, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=23168, PETRI_PLACES=354, PETRI_TRANSITIONS=858} [2023-11-17 16:00:43,067 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 329 predicate places. [2023-11-17 16:00:43,067 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 858 transitions, 23168 flow [2023-11-17 16:00:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:00:43,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:00:43,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-17 16:00:43,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:43,268 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:00:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:00:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash 761140364, now seen corresponding path program 12 times [2023-11-17 16:00:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:00:43,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934398013] [2023-11-17 16:00:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:00:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:00:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:00:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:00:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934398013] [2023-11-17 16:00:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934398013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:00:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033280451] [2023-11-17 16:00:43,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:00:43,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:00:43,482 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:00:43,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-17 16:00:43,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:00:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:00:43,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:00:43,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:00:44,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:44,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-17 16:00:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:00:44,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:00:44,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:44,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:00:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:00:44,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033280451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:00:44,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:00:44,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:00:44,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193330401] [2023-11-17 16:00:44,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:00:44,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:00:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:00:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:00:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:00:44,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:00:44,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 858 transitions, 23168 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:44,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:00:44,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:00:44,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:49,678 INFO L124 PetriNetUnfolderBase]: 7174/12121 cut-off events. [2023-11-17 16:00:49,678 INFO L125 PetriNetUnfolderBase]: For 305106/305106 co-relation queries the response was YES. [2023-11-17 16:00:49,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117922 conditions, 12121 events. 7174/12121 cut-off events. For 305106/305106 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 89488 event pairs, 1190 based on Foata normal form. 1/12122 useless extension candidates. Maximal degree in co-relation 117807. Up to 4002 conditions per place. [2023-11-17 16:00:49,844 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 895 selfloop transitions, 521 changer transitions 16/1432 dead transitions. [2023-11-17 16:00:49,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1432 transitions, 35509 flow [2023-11-17 16:00:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:00:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:00:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5333 transitions. [2023-11-17 16:00:49,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373821724552413 [2023-11-17 16:00:49,848 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5333 transitions. [2023-11-17 16:00:49,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5333 transitions. [2023-11-17 16:00:49,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:49,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5333 transitions. [2023-11-17 16:00:49,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 161.6060606060606) internal successors, (5333), 33 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:49,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 479.0) internal successors, (16286), 34 states have internal predecessors, (16286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:49,857 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 479.0) internal successors, (16286), 34 states have internal predecessors, (16286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:49,857 INFO L175 Difference]: Start difference. First operand has 354 places, 858 transitions, 23168 flow. Second operand 33 states and 5333 transitions. [2023-11-17 16:00:49,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1432 transitions, 35509 flow [2023-11-17 16:00:52,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1432 transitions, 34706 flow, removed 39 selfloop flow, removed 27 redundant places. [2023-11-17 16:00:52,889 INFO L231 Difference]: Finished difference. Result has 360 places, 867 transitions, 23700 flow [2023-11-17 16:00:52,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=22389, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=23700, PETRI_PLACES=360, PETRI_TRANSITIONS=867} [2023-11-17 16:00:52,890 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2023-11-17 16:00:52,890 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 867 transitions, 23700 flow [2023-11-17 16:00:52,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:52,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:00:52,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:00:52,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-17 16:00:53,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-17 16:00:53,092 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:00:53,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:00:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1906673190, now seen corresponding path program 13 times [2023-11-17 16:00:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:00:53,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035573202] [2023-11-17 16:00:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:00:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:00:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:53,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:00:53,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035573202] [2023-11-17 16:00:53,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035573202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:00:53,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037487486] [2023-11-17 16:00:53,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:00:53,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:00:53,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:00:53,307 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:00:53,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-17 16:00:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:00:53,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 16:00:53,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:00:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:53,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:00:53,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:00:53,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:00:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:00:54,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037487486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:00:54,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:00:54,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:00:54,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765047753] [2023-11-17 16:00:54,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:00:54,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:00:54,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:00:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:00:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:00:54,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:00:54,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 867 transitions, 23700 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:54,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:00:54,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:00:54,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:00:59,285 INFO L124 PetriNetUnfolderBase]: 7168/12122 cut-off events. [2023-11-17 16:00:59,285 INFO L125 PetriNetUnfolderBase]: For 314717/314717 co-relation queries the response was YES. [2023-11-17 16:00:59,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118244 conditions, 12122 events. 7168/12122 cut-off events. For 314717/314717 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 89052 event pairs, 1188 based on Foata normal form. 2/12124 useless extension candidates. Maximal degree in co-relation 118128. Up to 4004 conditions per place. [2023-11-17 16:00:59,445 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 1258 selfloop transitions, 501 changer transitions 39/1798 dead transitions. [2023-11-17 16:00:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1798 transitions, 43402 flow [2023-11-17 16:00:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:00:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:00:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6806 transitions. [2023-11-17 16:00:59,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3383040063624615 [2023-11-17 16:00:59,449 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6806 transitions. [2023-11-17 16:00:59,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6806 transitions. [2023-11-17 16:00:59,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:00:59,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6806 transitions. [2023-11-17 16:00:59,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 162.04761904761904) internal successors, (6806), 42 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:59,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 479.0) internal successors, (20597), 43 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:59,462 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 479.0) internal successors, (20597), 43 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:00:59,462 INFO L175 Difference]: Start difference. First operand has 360 places, 867 transitions, 23700 flow. Second operand 42 states and 6806 transitions. [2023-11-17 16:00:59,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1798 transitions, 43402 flow [2023-11-17 16:01:02,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1798 transitions, 42659 flow, removed 8 selfloop flow, removed 24 redundant places. [2023-11-17 16:01:02,801 INFO L231 Difference]: Finished difference. Result has 378 places, 859 transitions, 23805 flow [2023-11-17 16:01:02,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=22968, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=23805, PETRI_PLACES=378, PETRI_TRANSITIONS=859} [2023-11-17 16:01:02,801 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 353 predicate places. [2023-11-17 16:01:02,801 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 859 transitions, 23805 flow [2023-11-17 16:01:02,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:02,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:02,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:02,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-17 16:01:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-17 16:01:03,005 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash 875378077, now seen corresponding path program 5 times [2023-11-17 16:01:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:03,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5706396] [2023-11-17 16:01:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:01:03,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:03,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5706396] [2023-11-17 16:01:03,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5706396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:03,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:03,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 16:01:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909904094] [2023-11-17 16:01:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:03,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:01:03,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:01:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:01:03,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:01:03,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 859 transitions, 23805 flow. Second operand has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:03,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:03,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:01:03,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:06,878 INFO L124 PetriNetUnfolderBase]: 7122/12050 cut-off events. [2023-11-17 16:01:06,879 INFO L125 PetriNetUnfolderBase]: For 323624/323624 co-relation queries the response was YES. [2023-11-17 16:01:06,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119284 conditions, 12050 events. 7122/12050 cut-off events. For 323624/323624 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 89462 event pairs, 2149 based on Foata normal form. 24/12074 useless extension candidates. Maximal degree in co-relation 119167. Up to 8992 conditions per place. [2023-11-17 16:01:07,030 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 656 selfloop transitions, 225 changer transitions 24/905 dead transitions. [2023-11-17 16:01:07,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 905 transitions, 26792 flow [2023-11-17 16:01:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:01:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:01:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1619 transitions. [2023-11-17 16:01:07,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755509162607284 [2023-11-17 16:01:07,032 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1619 transitions. [2023-11-17 16:01:07,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1619 transitions. [2023-11-17 16:01:07,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:07,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1619 transitions. [2023-11-17 16:01:07,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.88888888888889) internal successors, (1619), 9 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:07,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:07,035 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:07,035 INFO L175 Difference]: Start difference. First operand has 378 places, 859 transitions, 23805 flow. Second operand 9 states and 1619 transitions. [2023-11-17 16:01:07,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 905 transitions, 26792 flow [2023-11-17 16:01:09,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 905 transitions, 25596 flow, removed 2 selfloop flow, removed 33 redundant places. [2023-11-17 16:01:09,778 INFO L231 Difference]: Finished difference. Result has 345 places, 840 transitions, 22344 flow [2023-11-17 16:01:09,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=22683, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22344, PETRI_PLACES=345, PETRI_TRANSITIONS=840} [2023-11-17 16:01:09,779 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 320 predicate places. [2023-11-17 16:01:09,779 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 840 transitions, 22344 flow [2023-11-17 16:01:09,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:09,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:09,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-11-17 16:01:09,780 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:09,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash -843959588, now seen corresponding path program 14 times [2023-11-17 16:01:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:09,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481102647] [2023-11-17 16:01:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:09,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481102647] [2023-11-17 16:01:09,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481102647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:01:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503946409] [2023-11-17 16:01:09,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:01:09,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:09,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:01:09,995 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:01:09,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-17 16:01:10,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:01:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:01:10,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:01:10,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:01:10,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:01:10,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-17 16:01:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:10,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:01:10,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:01:10,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:01:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:11,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503946409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:01:11,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:01:11,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:01:11,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575043085] [2023-11-17 16:01:11,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:01:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:01:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:01:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:01:11,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:01:11,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 840 transitions, 22344 flow. Second operand has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:11,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:11,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:01:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:15,748 INFO L124 PetriNetUnfolderBase]: 7064/11903 cut-off events. [2023-11-17 16:01:15,748 INFO L125 PetriNetUnfolderBase]: For 298628/298628 co-relation queries the response was YES. [2023-11-17 16:01:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117020 conditions, 11903 events. 7064/11903 cut-off events. For 298628/298628 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 86756 event pairs, 1150 based on Foata normal form. 1/11904 useless extension candidates. Maximal degree in co-relation 116904. Up to 3960 conditions per place. [2023-11-17 16:01:15,903 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 805 selfloop transitions, 538 changer transitions 16/1359 dead transitions. [2023-11-17 16:01:15,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1359 transitions, 34203 flow [2023-11-17 16:01:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:01:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:01:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4686 transitions. [2023-11-17 16:01:15,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373407242099201 [2023-11-17 16:01:15,906 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4686 transitions. [2023-11-17 16:01:15,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4686 transitions. [2023-11-17 16:01:15,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:15,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4686 transitions. [2023-11-17 16:01:15,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 161.58620689655172) internal successors, (4686), 29 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:15,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:15,915 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:15,915 INFO L175 Difference]: Start difference. First operand has 345 places, 840 transitions, 22344 flow. Second operand 29 states and 4686 transitions. [2023-11-17 16:01:15,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1359 transitions, 34203 flow [2023-11-17 16:01:18,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1359 transitions, 32927 flow, removed 36 selfloop flow, removed 11 redundant places. [2023-11-17 16:01:18,975 INFO L231 Difference]: Finished difference. Result has 360 places, 834 transitions, 22560 flow [2023-11-17 16:01:18,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=21611, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22560, PETRI_PLACES=360, PETRI_TRANSITIONS=834} [2023-11-17 16:01:18,976 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2023-11-17 16:01:18,976 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 834 transitions, 22560 flow [2023-11-17 16:01:18,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.8) internal successors, (5488), 35 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:18,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:18,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:18,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-17 16:01:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:19,182 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:19,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 401459829, now seen corresponding path program 15 times [2023-11-17 16:01:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201944538] [2023-11-17 16:01:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:01:19,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:19,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201944538] [2023-11-17 16:01:19,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201944538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:01:19,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660040419] [2023-11-17 16:01:19,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:01:19,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:19,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:01:19,461 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:01:19,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-17 16:01:19,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:01:19,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:01:19,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:01:19,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:01:19,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:01:19,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 99 [2023-11-17 16:01:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:01:19,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:01:20,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:01:20,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:01:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:01:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660040419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:01:20,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:01:20,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:01:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752009481] [2023-11-17 16:01:20,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:01:20,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:01:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:01:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:01:20,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:01:20,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 834 transitions, 22560 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:20,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:20,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:01:20,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:25,009 INFO L124 PetriNetUnfolderBase]: 7053/11883 cut-off events. [2023-11-17 16:01:25,009 INFO L125 PetriNetUnfolderBase]: For 299117/299117 co-relation queries the response was YES. [2023-11-17 16:01:25,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117359 conditions, 11883 events. 7053/11883 cut-off events. For 299117/299117 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 86656 event pairs, 994 based on Foata normal form. 4/11887 useless extension candidates. Maximal degree in co-relation 117245. Up to 3959 conditions per place. [2023-11-17 16:01:25,161 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 790 selfloop transitions, 380 changer transitions 55/1225 dead transitions. [2023-11-17 16:01:25,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1225 transitions, 31461 flow [2023-11-17 16:01:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:01:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:01:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3572 transitions. [2023-11-17 16:01:25,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3389637502372367 [2023-11-17 16:01:25,164 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3572 transitions. [2023-11-17 16:01:25,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3572 transitions. [2023-11-17 16:01:25,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:25,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3572 transitions. [2023-11-17 16:01:25,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 162.36363636363637) internal successors, (3572), 22 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:25,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 479.0) internal successors, (11017), 23 states have internal predecessors, (11017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:25,172 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 479.0) internal successors, (11017), 23 states have internal predecessors, (11017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:25,172 INFO L175 Difference]: Start difference. First operand has 360 places, 834 transitions, 22560 flow. Second operand 22 states and 3572 transitions. [2023-11-17 16:01:25,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1225 transitions, 31461 flow [2023-11-17 16:01:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1225 transitions, 30274 flow, removed 21 selfloop flow, removed 37 redundant places. [2023-11-17 16:01:28,196 INFO L231 Difference]: Finished difference. Result has 343 places, 795 transitions, 21081 flow [2023-11-17 16:01:28,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=21394, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=21081, PETRI_PLACES=343, PETRI_TRANSITIONS=795} [2023-11-17 16:01:28,197 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 318 predicate places. [2023-11-17 16:01:28,197 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 795 transitions, 21081 flow [2023-11-17 16:01:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:28,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:28,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:28,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-17 16:01:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:28,398 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash -137912047, now seen corresponding path program 6 times [2023-11-17 16:01:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065462844] [2023-11-17 16:01:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:01:28,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:28,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065462844] [2023-11-17 16:01:28,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065462844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:28,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:28,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 16:01:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423307982] [2023-11-17 16:01:28,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:28,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:01:28,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:01:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:01:28,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:01:28,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 795 transitions, 21081 flow. Second operand has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:28,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:28,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:01:28,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:31,639 INFO L124 PetriNetUnfolderBase]: 6831/11585 cut-off events. [2023-11-17 16:01:31,639 INFO L125 PetriNetUnfolderBase]: For 294398/294398 co-relation queries the response was YES. [2023-11-17 16:01:31,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114150 conditions, 11585 events. 6831/11585 cut-off events. For 294398/294398 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 85138 event pairs, 2098 based on Foata normal form. 64/11649 useless extension candidates. Maximal degree in co-relation 114045. Up to 8737 conditions per place. [2023-11-17 16:01:31,789 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 518 selfloop transitions, 276 changer transitions 0/794 dead transitions. [2023-11-17 16:01:31,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 794 transitions, 22701 flow [2023-11-17 16:01:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:01:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:01:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1441 transitions. [2023-11-17 16:01:31,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760438413361169 [2023-11-17 16:01:31,791 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1441 transitions. [2023-11-17 16:01:31,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1441 transitions. [2023-11-17 16:01:31,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:31,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1441 transitions. [2023-11-17 16:01:31,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.125) internal successors, (1441), 8 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:31,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:31,794 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:31,794 INFO L175 Difference]: Start difference. First operand has 343 places, 795 transitions, 21081 flow. Second operand 8 states and 1441 transitions. [2023-11-17 16:01:31,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 794 transitions, 22701 flow [2023-11-17 16:01:34,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 794 transitions, 21840 flow, removed 9 selfloop flow, removed 22 redundant places. [2023-11-17 16:01:34,595 INFO L231 Difference]: Finished difference. Result has 322 places, 775 transitions, 20377 flow [2023-11-17 16:01:34,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19825, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20377, PETRI_PLACES=322, PETRI_TRANSITIONS=775} [2023-11-17 16:01:34,596 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2023-11-17 16:01:34,596 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 775 transitions, 20377 flow [2023-11-17 16:01:34,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:34,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:34,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:34,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2023-11-17 16:01:34,597 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:34,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash -210737617, now seen corresponding path program 7 times [2023-11-17 16:01:34,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:34,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926906667] [2023-11-17 16:01:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:34,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:01:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926906667] [2023-11-17 16:01:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926906667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:01:34,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:01:34,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 16:01:34,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460154272] [2023-11-17 16:01:34,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:01:34,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:01:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:01:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:01:34,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:01:34,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 775 transitions, 20377 flow. Second operand has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:34,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:34,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:01:34,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:37,938 INFO L124 PetriNetUnfolderBase]: 6748/11466 cut-off events. [2023-11-17 16:01:37,938 INFO L125 PetriNetUnfolderBase]: For 274809/274809 co-relation queries the response was YES. [2023-11-17 16:01:38,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110674 conditions, 11466 events. 6748/11466 cut-off events. For 274809/274809 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 84263 event pairs, 2072 based on Foata normal form. 60/11526 useless extension candidates. Maximal degree in co-relation 110572. Up to 8731 conditions per place. [2023-11-17 16:01:38,102 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 527 selfloop transitions, 264 changer transitions 0/791 dead transitions. [2023-11-17 16:01:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 791 transitions, 22094 flow [2023-11-17 16:01:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:01:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:01:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1442 transitions. [2023-11-17 16:01:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763048016701461 [2023-11-17 16:01:38,104 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1442 transitions. [2023-11-17 16:01:38,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1442 transitions. [2023-11-17 16:01:38,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:38,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1442 transitions. [2023-11-17 16:01:38,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:38,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:38,107 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:38,107 INFO L175 Difference]: Start difference. First operand has 322 places, 775 transitions, 20377 flow. Second operand 8 states and 1442 transitions. [2023-11-17 16:01:38,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 791 transitions, 22094 flow [2023-11-17 16:01:40,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 791 transitions, 21564 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-17 16:01:40,710 INFO L231 Difference]: Finished difference. Result has 323 places, 763 transitions, 19868 flow [2023-11-17 16:01:40,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19288, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19868, PETRI_PLACES=323, PETRI_TRANSITIONS=763} [2023-11-17 16:01:40,710 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 298 predicate places. [2023-11-17 16:01:40,711 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 763 transitions, 19868 flow [2023-11-17 16:01:40,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:40,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:40,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:40,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2023-11-17 16:01:40,711 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:40,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash 711944411, now seen corresponding path program 16 times [2023-11-17 16:01:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231048157] [2023-11-17 16:01:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:40,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:40,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231048157] [2023-11-17 16:01:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231048157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:01:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76618252] [2023-11-17 16:01:40,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:01:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:01:40,926 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:01:40,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-17 16:01:41,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:01:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:01:41,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:01:41,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:01:41,267 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 16:01:41,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 33 [2023-11-17 16:01:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:41,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:01:41,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:01:41,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:01:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:42,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76618252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:01:42,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:01:42,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:01:42,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339976550] [2023-11-17 16:01:42,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:01:42,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:01:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:42,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:01:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:01:42,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 479 [2023-11-17 16:01:42,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 763 transitions, 19868 flow. Second operand has 31 states, 31 states have (on average 149.03225806451613) internal successors, (4620), 31 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:42,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:42,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 479 [2023-11-17 16:01:42,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:01:48,197 INFO L124 PetriNetUnfolderBase]: 8174/13912 cut-off events. [2023-11-17 16:01:48,197 INFO L125 PetriNetUnfolderBase]: For 335264/335264 co-relation queries the response was YES. [2023-11-17 16:01:48,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135360 conditions, 13912 events. 8174/13912 cut-off events. For 335264/335264 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 104441 event pairs, 360 based on Foata normal form. 207/14119 useless extension candidates. Maximal degree in co-relation 135257. Up to 4901 conditions per place. [2023-11-17 16:01:48,378 INFO L140 encePairwiseOnDemand]: 465/479 looper letters, 739 selfloop transitions, 953 changer transitions 47/1739 dead transitions. [2023-11-17 16:01:48,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1739 transitions, 42070 flow [2023-11-17 16:01:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-17 16:01:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-17 16:01:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 9644 transitions. [2023-11-17 16:01:48,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31958113795274545 [2023-11-17 16:01:48,384 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 9644 transitions. [2023-11-17 16:01:48,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 9644 transitions. [2023-11-17 16:01:48,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:01:48,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 9644 transitions. [2023-11-17 16:01:48,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 153.0793650793651) internal successors, (9644), 63 states have internal predecessors, (9644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:48,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 479.0) internal successors, (30656), 64 states have internal predecessors, (30656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:48,404 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 479.0) internal successors, (30656), 64 states have internal predecessors, (30656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:48,404 INFO L175 Difference]: Start difference. First operand has 323 places, 763 transitions, 19868 flow. Second operand 63 states and 9644 transitions. [2023-11-17 16:01:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1739 transitions, 42070 flow [2023-11-17 16:01:51,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1739 transitions, 41568 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-17 16:01:51,766 INFO L231 Difference]: Finished difference. Result has 409 places, 1326 transitions, 36104 flow [2023-11-17 16:01:51,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=19557, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=36104, PETRI_PLACES=409, PETRI_TRANSITIONS=1326} [2023-11-17 16:01:51,766 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 384 predicate places. [2023-11-17 16:01:51,767 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1326 transitions, 36104 flow [2023-11-17 16:01:51,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 149.03225806451613) internal successors, (4620), 31 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:51,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:01:51,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:01:51,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-17 16:01:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:51,969 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:01:51,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:01:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash 630258435, now seen corresponding path program 17 times [2023-11-17 16:01:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:01:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271561308] [2023-11-17 16:01:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:01:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:01:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:01:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:01:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271561308] [2023-11-17 16:01:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271561308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:01:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736873822] [2023-11-17 16:01:52,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:01:52,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:01:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:01:52,178 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:01:52,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-17 16:01:52,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:01:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:01:52,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:01:52,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:01:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:52,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:01:52,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:01:52,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:01:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:01:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736873822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:01:53,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:01:53,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:01:53,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238278331] [2023-11-17 16:01:53,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:01:53,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:01:53,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:01:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:01:53,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:01:53,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 479 [2023-11-17 16:01:53,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1326 transitions, 36104 flow. Second operand has 31 states, 31 states have (on average 149.03225806451613) internal successors, (4620), 31 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:01:53,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:01:53,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 479 [2023-11-17 16:01:53,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:02:00,045 INFO L124 PetriNetUnfolderBase]: 8651/14613 cut-off events. [2023-11-17 16:02:00,045 INFO L125 PetriNetUnfolderBase]: For 449901/449901 co-relation queries the response was YES. [2023-11-17 16:02:00,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156215 conditions, 14613 events. 8651/14613 cut-off events. For 449901/449901 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 109075 event pairs, 960 based on Foata normal form. 42/14655 useless extension candidates. Maximal degree in co-relation 156084. Up to 5212 conditions per place. [2023-11-17 16:02:00,284 INFO L140 encePairwiseOnDemand]: 465/479 looper letters, 900 selfloop transitions, 739 changer transitions 84/1723 dead transitions. [2023-11-17 16:02:00,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1723 transitions, 46072 flow [2023-11-17 16:02:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:02:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:02:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 7207 transitions. [2023-11-17 16:02:00,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32012614933593925 [2023-11-17 16:02:00,289 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 7207 transitions. [2023-11-17 16:02:00,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 7207 transitions. [2023-11-17 16:02:00,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:02:00,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 7207 transitions. [2023-11-17 16:02:00,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 153.3404255319149) internal successors, (7207), 47 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:00,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 479.0) internal successors, (22992), 48 states have internal predecessors, (22992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:00,303 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 479.0) internal successors, (22992), 48 states have internal predecessors, (22992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:00,303 INFO L175 Difference]: Start difference. First operand has 409 places, 1326 transitions, 36104 flow. Second operand 47 states and 7207 transitions. [2023-11-17 16:02:00,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1723 transitions, 46072 flow [2023-11-17 16:02:05,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1723 transitions, 42861 flow, removed 1050 selfloop flow, removed 30 redundant places. [2023-11-17 16:02:06,019 INFO L231 Difference]: Finished difference. Result has 430 places, 1388 transitions, 36299 flow [2023-11-17 16:02:06,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=33238, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=668, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=36299, PETRI_PLACES=430, PETRI_TRANSITIONS=1388} [2023-11-17 16:02:06,021 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 405 predicate places. [2023-11-17 16:02:06,021 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1388 transitions, 36299 flow [2023-11-17 16:02:06,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 149.03225806451613) internal successors, (4620), 31 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:06,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:02:06,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:02:06,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-17 16:02:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:02:06,227 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:02:06,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:02:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1609864617, now seen corresponding path program 8 times [2023-11-17 16:02:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:02:06,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501046867] [2023-11-17 16:02:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:02:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:02:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:02:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:02:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501046867] [2023-11-17 16:02:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501046867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:02:06,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:02:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 16:02:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316534210] [2023-11-17 16:02:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:02:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:02:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:02:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:02:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:02:06,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:02:06,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1388 transitions, 36299 flow. Second operand has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:06,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:02:06,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:02:06,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:02:11,492 INFO L124 PetriNetUnfolderBase]: 8505/14369 cut-off events. [2023-11-17 16:02:11,492 INFO L125 PetriNetUnfolderBase]: For 423940/423940 co-relation queries the response was YES. [2023-11-17 16:02:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148280 conditions, 14369 events. 8505/14369 cut-off events. For 423940/423940 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 107299 event pairs, 2586 based on Foata normal form. 24/14393 useless extension candidates. Maximal degree in co-relation 148160. Up to 11054 conditions per place. [2023-11-17 16:02:11,676 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 1006 selfloop transitions, 391 changer transitions 26/1423 dead transitions. [2023-11-17 16:02:11,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1423 transitions, 40099 flow [2023-11-17 16:02:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:02:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:02:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1618 transitions. [2023-11-17 16:02:11,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37531895151936906 [2023-11-17 16:02:11,678 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1618 transitions. [2023-11-17 16:02:11,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1618 transitions. [2023-11-17 16:02:11,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:02:11,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1618 transitions. [2023-11-17 16:02:11,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.77777777777777) internal successors, (1618), 9 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:11,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:11,680 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:11,681 INFO L175 Difference]: Start difference. First operand has 430 places, 1388 transitions, 36299 flow. Second operand 9 states and 1618 transitions. [2023-11-17 16:02:11,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1423 transitions, 40099 flow [2023-11-17 16:02:16,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1423 transitions, 38816 flow, removed 66 selfloop flow, removed 33 redundant places. [2023-11-17 16:02:16,697 INFO L231 Difference]: Finished difference. Result has 397 places, 1362 transitions, 35020 flow [2023-11-17 16:02:16,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=35022, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=35020, PETRI_PLACES=397, PETRI_TRANSITIONS=1362} [2023-11-17 16:02:16,699 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 372 predicate places. [2023-11-17 16:02:16,699 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1362 transitions, 35020 flow [2023-11-17 16:02:16,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:16,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:02:16,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:02:16,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2023-11-17 16:02:16,699 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:02:16,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:02:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash 551535083, now seen corresponding path program 9 times [2023-11-17 16:02:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:02:16,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751941598] [2023-11-17 16:02:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:02:16,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:02:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:02:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:16,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:02:16,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751941598] [2023-11-17 16:02:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751941598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:02:16,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:02:16,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-17 16:02:16,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944446725] [2023-11-17 16:02:16,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:02:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:02:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:02:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:02:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:02:16,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 479 [2023-11-17 16:02:16,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1362 transitions, 35020 flow. Second operand has 11 states, 11 states have (on average 166.9090909090909) internal successors, (1836), 11 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:16,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:02:16,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 479 [2023-11-17 16:02:16,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:02:21,879 INFO L124 PetriNetUnfolderBase]: 8417/14249 cut-off events. [2023-11-17 16:02:21,879 INFO L125 PetriNetUnfolderBase]: For 391236/391236 co-relation queries the response was YES. [2023-11-17 16:02:22,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142929 conditions, 14249 events. 8417/14249 cut-off events. For 391236/391236 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 106607 event pairs, 2321 based on Foata normal form. 80/14329 useless extension candidates. Maximal degree in co-relation 142815. Up to 10300 conditions per place. [2023-11-17 16:02:22,064 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 1124 selfloop transitions, 310 changer transitions 51/1485 dead transitions. [2023-11-17 16:02:22,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1485 transitions, 41023 flow [2023-11-17 16:02:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:02:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:02:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1714 transitions. [2023-11-17 16:02:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35782881002087685 [2023-11-17 16:02:22,066 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1714 transitions. [2023-11-17 16:02:22,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1714 transitions. [2023-11-17 16:02:22,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:02:22,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1714 transitions. [2023-11-17 16:02:22,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.4) internal successors, (1714), 10 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:22,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:22,069 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:22,069 INFO L175 Difference]: Start difference. First operand has 397 places, 1362 transitions, 35020 flow. Second operand 10 states and 1714 transitions. [2023-11-17 16:02:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1485 transitions, 41023 flow [2023-11-17 16:02:26,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1485 transitions, 40147 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 16:02:26,282 INFO L231 Difference]: Finished difference. Result has 395 places, 1322 transitions, 33541 flow [2023-11-17 16:02:26,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=34119, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=33541, PETRI_PLACES=395, PETRI_TRANSITIONS=1322} [2023-11-17 16:02:26,283 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 370 predicate places. [2023-11-17 16:02:26,283 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1322 transitions, 33541 flow [2023-11-17 16:02:26,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 166.9090909090909) internal successors, (1836), 11 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:26,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:02:26,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:02:26,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2023-11-17 16:02:26,284 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:02:26,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:02:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 868068331, now seen corresponding path program 10 times [2023-11-17 16:02:26,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:02:26,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244055024] [2023-11-17 16:02:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:02:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:02:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:02:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:02:26,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244055024] [2023-11-17 16:02:26,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244055024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:02:26,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926565837] [2023-11-17 16:02:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:02:26,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:02:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:02:26,485 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:02:26,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-17 16:02:26,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:02:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:02:26,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:02:26,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:02:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:02:26,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:02:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:26,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:02:30,814 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2217 (Array Int Int)) (~get2~0.offset Int) (~get2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2217))) (let ((.cse0 (select .cse1 ~get2~0.base))) (or (= |c_thread1Thread1of1ForFork0_#t~mem2| (select .cse0 (+ ~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (not (= (select (select .cse1 c_~get1~0.base) c_~get1~0.offset) (select .cse0 ~get2~0.offset))))))) is different from false [2023-11-17 16:02:30,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:02:30,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-11-17 16:02:30,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:02:30,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-11-17 16:02:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926565837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:02:31,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:02:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-17 16:02:31,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401527082] [2023-11-17 16:02:31,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:02:31,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:02:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:02:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:02:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=424, Unknown=3, NotChecked=42, Total=552 [2023-11-17 16:02:31,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 479 [2023-11-17 16:02:31,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1322 transitions, 33541 flow. Second operand has 24 states, 24 states have (on average 171.125) internal successors, (4107), 24 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:31,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:02:31,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 479 [2023-11-17 16:02:31,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:02:36,312 INFO L124 PetriNetUnfolderBase]: 8267/13929 cut-off events. [2023-11-17 16:02:36,312 INFO L125 PetriNetUnfolderBase]: For 378034/378034 co-relation queries the response was YES. [2023-11-17 16:02:36,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139410 conditions, 13929 events. 8267/13929 cut-off events. For 378034/378034 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 102902 event pairs, 2495 based on Foata normal form. 30/13959 useless extension candidates. Maximal degree in co-relation 139295. Up to 10854 conditions per place. [2023-11-17 16:02:36,493 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 1059 selfloop transitions, 353 changer transitions 1/1413 dead transitions. [2023-11-17 16:02:36,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1413 transitions, 38734 flow [2023-11-17 16:02:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:02:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:02:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1570 transitions. [2023-11-17 16:02:36,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36418464393412203 [2023-11-17 16:02:36,494 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1570 transitions. [2023-11-17 16:02:36,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1570 transitions. [2023-11-17 16:02:36,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:02:36,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1570 transitions. [2023-11-17 16:02:36,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.44444444444446) internal successors, (1570), 9 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:36,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:36,497 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:36,497 INFO L175 Difference]: Start difference. First operand has 395 places, 1322 transitions, 33541 flow. Second operand 9 states and 1570 transitions. [2023-11-17 16:02:36,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1413 transitions, 38734 flow [2023-11-17 16:02:40,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1413 transitions, 37535 flow, removed 15 selfloop flow, removed 13 redundant places. [2023-11-17 16:02:40,533 INFO L231 Difference]: Finished difference. Result has 387 places, 1322 transitions, 33069 flow [2023-11-17 16:02:40,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=32346, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=33069, PETRI_PLACES=387, PETRI_TRANSITIONS=1322} [2023-11-17 16:02:40,534 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 362 predicate places. [2023-11-17 16:02:40,534 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1322 transitions, 33069 flow [2023-11-17 16:02:40,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.125) internal successors, (4107), 24 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:40,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:02:40,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:02:40,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-17 16:02:40,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-11-17 16:02:40,736 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:02:40,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:02:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash -539034211, now seen corresponding path program 11 times [2023-11-17 16:02:40,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:02:40,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834391437] [2023-11-17 16:02:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:02:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:02:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:02:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:40,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:02:40,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834391437] [2023-11-17 16:02:40,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834391437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:02:40,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:02:40,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 16:02:40,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319986425] [2023-11-17 16:02:40,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:02:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:02:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:02:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:02:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:02:40,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 479 [2023-11-17 16:02:40,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1322 transitions, 33069 flow. Second operand has 10 states, 10 states have (on average 171.1) internal successors, (1711), 10 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:40,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:02:40,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 479 [2023-11-17 16:02:40,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:02:45,549 INFO L124 PetriNetUnfolderBase]: 8133/13687 cut-off events. [2023-11-17 16:02:45,549 INFO L125 PetriNetUnfolderBase]: For 359257/359257 co-relation queries the response was YES. [2023-11-17 16:02:45,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135907 conditions, 13687 events. 8133/13687 cut-off events. For 359257/359257 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 100647 event pairs, 2473 based on Foata normal form. 32/13719 useless extension candidates. Maximal degree in co-relation 135797. Up to 10824 conditions per place. [2023-11-17 16:02:45,724 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 1040 selfloop transitions, 340 changer transitions 0/1380 dead transitions. [2023-11-17 16:02:45,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1380 transitions, 37254 flow [2023-11-17 16:02:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:02:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:02:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1569 transitions. [2023-11-17 16:02:45,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3639526791927627 [2023-11-17 16:02:45,725 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1569 transitions. [2023-11-17 16:02:45,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1569 transitions. [2023-11-17 16:02:45,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:02:45,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1569 transitions. [2023-11-17 16:02:45,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.33333333333334) internal successors, (1569), 9 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:45,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:45,728 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:45,728 INFO L175 Difference]: Start difference. First operand has 387 places, 1322 transitions, 33069 flow. Second operand 9 states and 1569 transitions. [2023-11-17 16:02:45,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1380 transitions, 37254 flow [2023-11-17 16:02:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1380 transitions, 36457 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 16:02:49,822 INFO L231 Difference]: Finished difference. Result has 387 places, 1299 transitions, 32294 flow [2023-11-17 16:02:49,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=31614, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=32294, PETRI_PLACES=387, PETRI_TRANSITIONS=1299} [2023-11-17 16:02:49,823 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 362 predicate places. [2023-11-17 16:02:49,823 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1299 transitions, 32294 flow [2023-11-17 16:02:49,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.1) internal successors, (1711), 10 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:49,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:02:49,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:02:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2023-11-17 16:02:49,824 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:02:49,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:02:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash -959827641, now seen corresponding path program 12 times [2023-11-17 16:02:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:02:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997090664] [2023-11-17 16:02:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:02:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:02:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:02:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:02:50,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:02:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997090664] [2023-11-17 16:02:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997090664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:02:50,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:02:50,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-17 16:02:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333576444] [2023-11-17 16:02:50,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:02:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:02:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:02:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:02:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:02:50,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 479 [2023-11-17 16:02:50,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1299 transitions, 32294 flow. Second operand has 11 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:50,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:02:50,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 479 [2023-11-17 16:02:50,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:02:54,477 INFO L124 PetriNetUnfolderBase]: 8081/13575 cut-off events. [2023-11-17 16:02:54,477 INFO L125 PetriNetUnfolderBase]: For 352510/352510 co-relation queries the response was YES. [2023-11-17 16:02:54,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134978 conditions, 13575 events. 8081/13575 cut-off events. For 352510/352510 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 99517 event pairs, 2447 based on Foata normal form. 24/13599 useless extension candidates. Maximal degree in co-relation 134869. Up to 10678 conditions per place. [2023-11-17 16:02:54,649 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 1034 selfloop transitions, 331 changer transitions 14/1379 dead transitions. [2023-11-17 16:02:54,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1379 transitions, 37107 flow [2023-11-17 16:02:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:02:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:02:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1741 transitions. [2023-11-17 16:02:54,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3634655532359081 [2023-11-17 16:02:54,651 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1741 transitions. [2023-11-17 16:02:54,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1741 transitions. [2023-11-17 16:02:54,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:02:54,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1741 transitions. [2023-11-17 16:02:54,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 174.1) internal successors, (1741), 10 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:54,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:54,654 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:54,654 INFO L175 Difference]: Start difference. First operand has 387 places, 1299 transitions, 32294 flow. Second operand 10 states and 1741 transitions. [2023-11-17 16:02:54,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1379 transitions, 37107 flow [2023-11-17 16:02:58,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1379 transitions, 36427 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:02:58,585 INFO L231 Difference]: Finished difference. Result has 388 places, 1285 transitions, 31935 flow [2023-11-17 16:02:58,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=31577, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=31935, PETRI_PLACES=388, PETRI_TRANSITIONS=1285} [2023-11-17 16:02:58,586 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 363 predicate places. [2023-11-17 16:02:58,586 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1285 transitions, 31935 flow [2023-11-17 16:02:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:02:58,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:02:58,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:02:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2023-11-17 16:02:58,586 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:02:58,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:02:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash 148921405, now seen corresponding path program 18 times [2023-11-17 16:02:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:02:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627127107] [2023-11-17 16:02:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:02:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:02:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:02:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:02:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:02:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627127107] [2023-11-17 16:02:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627127107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:02:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621139455] [2023-11-17 16:02:58,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:02:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:02:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:02:58,854 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:02:58,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-17 16:02:59,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:02:59,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:02:59,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:02:59,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:02:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:02:59,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:02:59,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:02:59,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:03:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:03:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621139455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:03:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:03:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:03:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335401546] [2023-11-17 16:03:00,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:03:00,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:03:00,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:03:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:03:00,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:03:00,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1285 transitions, 31935 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:00,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:00,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:03:00,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:05,421 INFO L124 PetriNetUnfolderBase]: 8059/13513 cut-off events. [2023-11-17 16:03:05,422 INFO L125 PetriNetUnfolderBase]: For 348746/348746 co-relation queries the response was YES. [2023-11-17 16:03:05,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134382 conditions, 13513 events. 8059/13513 cut-off events. For 348746/348746 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 98659 event pairs, 1076 based on Foata normal form. 12/13525 useless extension candidates. Maximal degree in co-relation 134273. Up to 4942 conditions per place. [2023-11-17 16:03:05,580 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 990 selfloop transitions, 533 changer transitions 42/1565 dead transitions. [2023-11-17 16:03:05,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1565 transitions, 39612 flow [2023-11-17 16:03:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:03:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:03:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4373 transitions. [2023-11-17 16:03:05,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33812727132142584 [2023-11-17 16:03:05,583 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4373 transitions. [2023-11-17 16:03:05,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4373 transitions. [2023-11-17 16:03:05,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:05,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4373 transitions. [2023-11-17 16:03:05,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 161.96296296296296) internal successors, (4373), 27 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:05,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 479.0) internal successors, (13412), 28 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:05,591 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 479.0) internal successors, (13412), 28 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:05,591 INFO L175 Difference]: Start difference. First operand has 388 places, 1285 transitions, 31935 flow. Second operand 27 states and 4373 transitions. [2023-11-17 16:03:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1565 transitions, 39612 flow [2023-11-17 16:03:09,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1565 transitions, 38489 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-17 16:03:09,578 INFO L231 Difference]: Finished difference. Result has 404 places, 1274 transitions, 31873 flow [2023-11-17 16:03:09,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=31078, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31873, PETRI_PLACES=404, PETRI_TRANSITIONS=1274} [2023-11-17 16:03:09,579 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 379 predicate places. [2023-11-17 16:03:09,579 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1274 transitions, 31873 flow [2023-11-17 16:03:09,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:09,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:03:09,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-17 16:03:09,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-11-17 16:03:09,780 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:09,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 212886019, now seen corresponding path program 19 times [2023-11-17 16:03:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570060013] [2023-11-17 16:03:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:03:09,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:09,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570060013] [2023-11-17 16:03:09,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570060013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:03:09,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166468460] [2023-11-17 16:03:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:03:09,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:03:09,974 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:03:09,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-17 16:03:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:10,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:03:10,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:03:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:03:10,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:03:10,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:03:10,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:03:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:03:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166468460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:03:11,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:03:11,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:03:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527257105] [2023-11-17 16:03:11,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:03:11,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:03:11,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:03:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:03:11,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:03:11,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1274 transitions, 31873 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:11,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:11,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:03:11,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:15,958 INFO L124 PetriNetUnfolderBase]: 6987/12071 cut-off events. [2023-11-17 16:03:15,959 INFO L125 PetriNetUnfolderBase]: For 301910/301910 co-relation queries the response was YES. [2023-11-17 16:03:16,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117827 conditions, 12071 events. 6987/12071 cut-off events. For 301910/301910 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 91190 event pairs, 1018 based on Foata normal form. 121/12192 useless extension candidates. Maximal degree in co-relation 117715. Up to 4320 conditions per place. [2023-11-17 16:03:16,111 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 943 selfloop transitions, 520 changer transitions 19/1482 dead transitions. [2023-11-17 16:03:16,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1482 transitions, 36830 flow [2023-11-17 16:03:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:03:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:03:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4373 transitions. [2023-11-17 16:03:16,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33812727132142584 [2023-11-17 16:03:16,114 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4373 transitions. [2023-11-17 16:03:16,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4373 transitions. [2023-11-17 16:03:16,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:16,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4373 transitions. [2023-11-17 16:03:16,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 161.96296296296296) internal successors, (4373), 27 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:16,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 479.0) internal successors, (13412), 28 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:16,122 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 479.0) internal successors, (13412), 28 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:16,122 INFO L175 Difference]: Start difference. First operand has 404 places, 1274 transitions, 31873 flow. Second operand 27 states and 4373 transitions. [2023-11-17 16:03:16,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1482 transitions, 36830 flow [2023-11-17 16:03:19,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1482 transitions, 35787 flow, removed 54 selfloop flow, removed 31 redundant places. [2023-11-17 16:03:19,554 INFO L231 Difference]: Finished difference. Result has 392 places, 1163 transitions, 29234 flow [2023-11-17 16:03:19,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=27881, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29234, PETRI_PLACES=392, PETRI_TRANSITIONS=1163} [2023-11-17 16:03:19,555 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 367 predicate places. [2023-11-17 16:03:19,555 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1163 transitions, 29234 flow [2023-11-17 16:03:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:19,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:03:19,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-17 16:03:19,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:19,761 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:19,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:19,761 INFO L85 PathProgramCache]: Analyzing trace with hash -485930965, now seen corresponding path program 13 times [2023-11-17 16:03:19,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:19,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758470812] [2023-11-17 16:03:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:19,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758470812] [2023-11-17 16:03:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758470812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:03:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155710969] [2023-11-17 16:03:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:03:19,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:03:19,915 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:03:19,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-17 16:03:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:20,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:03:20,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:03:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:20,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:03:20,183 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 16:03:20,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 16:03:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:20,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155710969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:03:20,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:03:20,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-11-17 16:03:20,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820304587] [2023-11-17 16:03:20,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:03:20,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:03:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:03:20,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:03:20,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:03:20,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1163 transitions, 29234 flow. Second operand has 14 states, 14 states have (on average 176.71428571428572) internal successors, (2474), 14 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:03:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:24,222 INFO L124 PetriNetUnfolderBase]: 6771/11749 cut-off events. [2023-11-17 16:03:24,222 INFO L125 PetriNetUnfolderBase]: For 275153/275153 co-relation queries the response was YES. [2023-11-17 16:03:24,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114209 conditions, 11749 events. 6771/11749 cut-off events. For 275153/275153 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 88453 event pairs, 486 based on Foata normal form. 94/11843 useless extension candidates. Maximal degree in co-relation 114101. Up to 6991 conditions per place. [2023-11-17 16:03:24,376 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 835 selfloop transitions, 361 changer transitions 6/1202 dead transitions. [2023-11-17 16:03:24,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1202 transitions, 31779 flow [2023-11-17 16:03:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:03:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:03:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1620 transitions. [2023-11-17 16:03:24,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757828810020877 [2023-11-17 16:03:24,377 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1620 transitions. [2023-11-17 16:03:24,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1620 transitions. [2023-11-17 16:03:24,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:24,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1620 transitions. [2023-11-17 16:03:24,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.0) internal successors, (1620), 9 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:24,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:24,380 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:24,380 INFO L175 Difference]: Start difference. First operand has 392 places, 1163 transitions, 29234 flow. Second operand 9 states and 1620 transitions. [2023-11-17 16:03:24,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1202 transitions, 31779 flow [2023-11-17 16:03:27,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1202 transitions, 30550 flow, removed 58 selfloop flow, removed 27 redundant places. [2023-11-17 16:03:27,896 INFO L231 Difference]: Finished difference. Result has 374 places, 1149 transitions, 28232 flow [2023-11-17 16:03:27,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=27068, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=28232, PETRI_PLACES=374, PETRI_TRANSITIONS=1149} [2023-11-17 16:03:27,898 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 349 predicate places. [2023-11-17 16:03:27,898 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1149 transitions, 28232 flow [2023-11-17 16:03:27,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 176.71428571428572) internal successors, (2474), 14 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:27,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:27,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:03:27,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-17 16:03:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:28,103 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:28,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash -896409295, now seen corresponding path program 14 times [2023-11-17 16:03:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:28,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987645375] [2023-11-17 16:03:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:28,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:28,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:28,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987645375] [2023-11-17 16:03:28,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987645375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:03:28,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:03:28,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 16:03:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397315164] [2023-11-17 16:03:28,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:03:28,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:03:28,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:03:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:03:28,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:03:28,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1149 transitions, 28232 flow. Second operand has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:28,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:28,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:03:28,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:31,964 INFO L124 PetriNetUnfolderBase]: 6739/11717 cut-off events. [2023-11-17 16:03:31,965 INFO L125 PetriNetUnfolderBase]: For 263859/263859 co-relation queries the response was YES. [2023-11-17 16:03:32,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112864 conditions, 11717 events. 6739/11717 cut-off events. For 263859/263859 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 88744 event pairs, 1808 based on Foata normal form. 32/11749 useless extension candidates. Maximal degree in co-relation 112759. Up to 8890 conditions per place. [2023-11-17 16:03:32,106 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 817 selfloop transitions, 338 changer transitions 0/1155 dead transitions. [2023-11-17 16:03:32,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1155 transitions, 30513 flow [2023-11-17 16:03:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:03:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:03:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1437 transitions. [2023-11-17 16:03:32,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 16:03:32,107 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1437 transitions. [2023-11-17 16:03:32,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1437 transitions. [2023-11-17 16:03:32,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:32,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1437 transitions. [2023-11-17 16:03:32,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.625) internal successors, (1437), 8 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:32,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:32,110 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:32,110 INFO L175 Difference]: Start difference. First operand has 374 places, 1149 transitions, 28232 flow. Second operand 8 states and 1437 transitions. [2023-11-17 16:03:32,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1155 transitions, 30513 flow [2023-11-17 16:03:35,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1155 transitions, 29700 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-11-17 16:03:35,244 INFO L231 Difference]: Finished difference. Result has 372 places, 1139 transitions, 27943 flow [2023-11-17 16:03:35,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=27267, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=27943, PETRI_PLACES=372, PETRI_TRANSITIONS=1139} [2023-11-17 16:03:35,245 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 347 predicate places. [2023-11-17 16:03:35,245 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1139 transitions, 27943 flow [2023-11-17 16:03:35,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:35,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:35,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:03:35,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2023-11-17 16:03:35,245 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:35,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:35,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1015871653, now seen corresponding path program 15 times [2023-11-17 16:03:35,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:35,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935186835] [2023-11-17 16:03:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:35,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:35,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935186835] [2023-11-17 16:03:35,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935186835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:03:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749608956] [2023-11-17 16:03:35,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:03:35,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:35,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:03:35,401 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:03:35,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-17 16:03:35,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:03:35,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:03:35,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:03:35,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:03:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:35,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:03:35,706 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 16:03:35,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 16:03:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749608956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:03:35,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:03:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-11-17 16:03:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24813791] [2023-11-17 16:03:35,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:03:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:03:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:03:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:03:35,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:03:35,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1139 transitions, 27943 flow. Second operand has 14 states, 14 states have (on average 176.71428571428572) internal successors, (2474), 14 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:35,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:35,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:03:35,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:39,489 INFO L124 PetriNetUnfolderBase]: 6587/11507 cut-off events. [2023-11-17 16:03:39,489 INFO L125 PetriNetUnfolderBase]: For 253030/253030 co-relation queries the response was YES. [2023-11-17 16:03:39,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110591 conditions, 11507 events. 6587/11507 cut-off events. For 253030/253030 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 87403 event pairs, 1710 based on Foata normal form. 71/11578 useless extension candidates. Maximal degree in co-relation 110487. Up to 8262 conditions per place. [2023-11-17 16:03:39,634 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 745 selfloop transitions, 379 changer transitions 3/1127 dead transitions. [2023-11-17 16:03:39,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1127 transitions, 29347 flow [2023-11-17 16:03:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:03:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:03:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1621 transitions. [2023-11-17 16:03:39,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376014845743447 [2023-11-17 16:03:39,636 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1621 transitions. [2023-11-17 16:03:39,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1621 transitions. [2023-11-17 16:03:39,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:39,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1621 transitions. [2023-11-17 16:03:39,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.11111111111111) internal successors, (1621), 9 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:39,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:39,639 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:39,639 INFO L175 Difference]: Start difference. First operand has 372 places, 1139 transitions, 27943 flow. Second operand 9 states and 1621 transitions. [2023-11-17 16:03:39,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1127 transitions, 29347 flow [2023-11-17 16:03:42,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1127 transitions, 28637 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-11-17 16:03:42,933 INFO L231 Difference]: Finished difference. Result has 369 places, 1102 transitions, 26953 flow [2023-11-17 16:03:42,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=26040, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26953, PETRI_PLACES=369, PETRI_TRANSITIONS=1102} [2023-11-17 16:03:42,935 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 344 predicate places. [2023-11-17 16:03:42,935 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1102 transitions, 26953 flow [2023-11-17 16:03:42,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 176.71428571428572) internal successors, (2474), 14 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:42,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:42,935 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] [2023-11-17 16:03:42,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-17 16:03:43,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:43,140 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:43,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1956631339, now seen corresponding path program 16 times [2023-11-17 16:03:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44478159] [2023-11-17 16:03:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44478159] [2023-11-17 16:03:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44478159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:03:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813453568] [2023-11-17 16:03:43,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:03:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:03:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:03:43,294 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:03:43,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-17 16:03:43,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:03:43,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:03:43,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:03:43,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:03:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:43,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:03:45,548 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 16:03:45,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 16:03:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:45,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813453568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:03:45,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:03:45,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2023-11-17 16:03:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450763971] [2023-11-17 16:03:45,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:03:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:03:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:03:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=184, Unknown=1, NotChecked=0, Total=240 [2023-11-17 16:03:45,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:03:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1102 transitions, 26953 flow. Second operand has 16 states, 16 states have (on average 176.5625) internal successors, (2825), 16 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:03:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:49,162 INFO L124 PetriNetUnfolderBase]: 6423/11235 cut-off events. [2023-11-17 16:03:49,162 INFO L125 PetriNetUnfolderBase]: For 247044/247044 co-relation queries the response was YES. [2023-11-17 16:03:49,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107380 conditions, 11235 events. 6423/11235 cut-off events. For 247044/247044 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 85020 event pairs, 1672 based on Foata normal form. 38/11273 useless extension candidates. Maximal degree in co-relation 107277. Up to 8337 conditions per place. [2023-11-17 16:03:49,390 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 763 selfloop transitions, 346 changer transitions 2/1111 dead transitions. [2023-11-17 16:03:49,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1111 transitions, 28846 flow [2023-11-17 16:03:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:03:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:03:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1440 transitions. [2023-11-17 16:03:49,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757828810020877 [2023-11-17 16:03:49,391 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1440 transitions. [2023-11-17 16:03:49,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1440 transitions. [2023-11-17 16:03:49,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:49,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1440 transitions. [2023-11-17 16:03:49,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:49,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:49,394 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:49,394 INFO L175 Difference]: Start difference. First operand has 369 places, 1102 transitions, 26953 flow. Second operand 8 states and 1440 transitions. [2023-11-17 16:03:49,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1111 transitions, 28846 flow [2023-11-17 16:03:52,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1111 transitions, 27935 flow, removed 64 selfloop flow, removed 10 redundant places. [2023-11-17 16:03:52,524 INFO L231 Difference]: Finished difference. Result has 366 places, 1084 transitions, 26039 flow [2023-11-17 16:03:52,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=25383, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=26039, PETRI_PLACES=366, PETRI_TRANSITIONS=1084} [2023-11-17 16:03:52,525 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 341 predicate places. [2023-11-17 16:03:52,525 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1084 transitions, 26039 flow [2023-11-17 16:03:52,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 176.5625) internal successors, (2825), 16 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:52,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:52,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:03:52,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-17 16:03:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-11-17 16:03:52,727 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:52,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1903637071, now seen corresponding path program 17 times [2023-11-17 16:03:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037682350] [2023-11-17 16:03:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:52,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037682350] [2023-11-17 16:03:52,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037682350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:03:52,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:03:52,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 16:03:52,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105815524] [2023-11-17 16:03:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:03:52,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:03:52,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:03:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:03:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:03:52,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1084 transitions, 26039 flow. Second operand has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:52,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:52,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:03:52,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:03:56,129 INFO L124 PetriNetUnfolderBase]: 6383/11163 cut-off events. [2023-11-17 16:03:56,129 INFO L125 PetriNetUnfolderBase]: For 236868/236868 co-relation queries the response was YES. [2023-11-17 16:03:56,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106111 conditions, 11163 events. 6383/11163 cut-off events. For 236868/236868 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 84451 event pairs, 1707 based on Foata normal form. 24/11187 useless extension candidates. Maximal degree in co-relation 106011. Up to 8336 conditions per place. [2023-11-17 16:03:56,385 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 760 selfloop transitions, 324 changer transitions 15/1099 dead transitions. [2023-11-17 16:03:56,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1099 transitions, 28327 flow [2023-11-17 16:03:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:03:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:03:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1614 transitions. [2023-11-17 16:03:56,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3743910925539318 [2023-11-17 16:03:56,386 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1614 transitions. [2023-11-17 16:03:56,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1614 transitions. [2023-11-17 16:03:56,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:03:56,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1614 transitions. [2023-11-17 16:03:56,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.33333333333334) internal successors, (1614), 9 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:56,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:56,389 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:56,389 INFO L175 Difference]: Start difference. First operand has 366 places, 1084 transitions, 26039 flow. Second operand 9 states and 1614 transitions. [2023-11-17 16:03:56,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1099 transitions, 28327 flow [2023-11-17 16:03:59,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1099 transitions, 27587 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-11-17 16:03:59,501 INFO L231 Difference]: Finished difference. Result has 365 places, 1069 transitions, 25513 flow [2023-11-17 16:03:59,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=25257, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25513, PETRI_PLACES=365, PETRI_TRANSITIONS=1069} [2023-11-17 16:03:59,502 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 340 predicate places. [2023-11-17 16:03:59,502 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1069 transitions, 25513 flow [2023-11-17 16:03:59,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.1) internal successors, (1761), 10 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:59,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:03:59,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:03:59,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2023-11-17 16:03:59,503 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:03:59,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:03:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1499038289, now seen corresponding path program 18 times [2023-11-17 16:03:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:03:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727578501] [2023-11-17 16:03:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:03:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:03:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:03:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:03:59,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:03:59,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727578501] [2023-11-17 16:03:59,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727578501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:03:59,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:03:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 16:03:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581020443] [2023-11-17 16:03:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:03:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:03:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:03:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:03:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:03:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2023-11-17 16:03:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1069 transitions, 25513 flow. Second operand has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:03:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:03:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2023-11-17 16:03:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:02,870 INFO L124 PetriNetUnfolderBase]: 6184/10760 cut-off events. [2023-11-17 16:04:02,870 INFO L125 PetriNetUnfolderBase]: For 232426/232426 co-relation queries the response was YES. [2023-11-17 16:04:02,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102192 conditions, 10760 events. 6184/10760 cut-off events. For 232426/232426 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 80227 event pairs, 2050 based on Foata normal form. 61/10821 useless extension candidates. Maximal degree in co-relation 102095. Up to 9147 conditions per place. [2023-11-17 16:04:03,000 INFO L140 encePairwiseOnDemand]: 471/479 looper letters, 829 selfloop transitions, 260 changer transitions 3/1092 dead transitions. [2023-11-17 16:04:03,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1092 transitions, 28161 flow [2023-11-17 16:04:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1439 transitions. [2023-11-17 16:04:03,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37552192066805845 [2023-11-17 16:04:03,002 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1439 transitions. [2023-11-17 16:04:03,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1439 transitions. [2023-11-17 16:04:03,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:03,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1439 transitions. [2023-11-17 16:04:03,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,005 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,005 INFO L175 Difference]: Start difference. First operand has 365 places, 1069 transitions, 25513 flow. Second operand 8 states and 1439 transitions. [2023-11-17 16:04:03,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1092 transitions, 28161 flow [2023-11-17 16:04:05,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1092 transitions, 26876 flow, removed 51 selfloop flow, removed 10 redundant places. [2023-11-17 16:04:05,832 INFO L231 Difference]: Finished difference. Result has 356 places, 1051 transitions, 24374 flow [2023-11-17 16:04:05,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=23727, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24374, PETRI_PLACES=356, PETRI_TRANSITIONS=1051} [2023-11-17 16:04:05,833 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 331 predicate places. [2023-11-17 16:04:05,833 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1051 transitions, 24374 flow [2023-11-17 16:04:05,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:05,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:05,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:05,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2023-11-17 16:04:05,833 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:05,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -200319847, now seen corresponding path program 20 times [2023-11-17 16:04:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010767672] [2023-11-17 16:04:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:05,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:06,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:06,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010767672] [2023-11-17 16:04:06,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010767672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:06,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349154731] [2023-11-17 16:04:06,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:06,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:06,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:06,033 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:06,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-17 16:04:06,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:04:06,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:06,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:04:06,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:06,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:06,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:06,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:04:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:07,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349154731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:07,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:07,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:04:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106241978] [2023-11-17 16:04:07,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:04:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:04:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:04:07,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:04:07,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1051 transitions, 24374 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:07,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:07,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:04:07,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:11,302 INFO L124 PetriNetUnfolderBase]: 6136/10662 cut-off events. [2023-11-17 16:04:11,302 INFO L125 PetriNetUnfolderBase]: For 209379/209379 co-relation queries the response was YES. [2023-11-17 16:04:11,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98942 conditions, 10662 events. 6136/10662 cut-off events. For 209379/209379 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 79379 event pairs, 866 based on Foata normal form. 2/10664 useless extension candidates. Maximal degree in co-relation 98845. Up to 3627 conditions per place. [2023-11-17 16:04:11,427 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 833 selfloop transitions, 423 changer transitions 17/1273 dead transitions. [2023-11-17 16:04:11,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1273 transitions, 30378 flow [2023-11-17 16:04:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:04:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:04:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3887 transitions. [2023-11-17 16:04:11,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33811760612386915 [2023-11-17 16:04:11,429 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3887 transitions. [2023-11-17 16:04:11,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3887 transitions. [2023-11-17 16:04:11,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:11,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3887 transitions. [2023-11-17 16:04:11,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 161.95833333333334) internal successors, (3887), 24 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:11,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:11,437 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 479.0) internal successors, (11975), 25 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:11,437 INFO L175 Difference]: Start difference. First operand has 356 places, 1051 transitions, 24374 flow. Second operand 24 states and 3887 transitions. [2023-11-17 16:04:11,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1273 transitions, 30378 flow [2023-11-17 16:04:14,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1273 transitions, 29359 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:14,145 INFO L231 Difference]: Finished difference. Result has 370 places, 1041 transitions, 24111 flow [2023-11-17 16:04:14,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=23550, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=24111, PETRI_PLACES=370, PETRI_TRANSITIONS=1041} [2023-11-17 16:04:14,146 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 345 predicate places. [2023-11-17 16:04:14,146 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1041 transitions, 24111 flow [2023-11-17 16:04:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:14,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:14,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:14,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:14,354 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:14,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1464931871, now seen corresponding path program 21 times [2023-11-17 16:04:14,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:14,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469073198] [2023-11-17 16:04:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469073198] [2023-11-17 16:04:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469073198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808827522] [2023-11-17 16:04:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:14,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:14,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:14,545 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:14,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-17 16:04:14,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:04:14,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:14,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:04:14,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:15,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:15,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:15,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-17 16:04:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:15,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808827522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:15,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:15,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:04:15,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774791973] [2023-11-17 16:04:15,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:15,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:04:15,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:04:15,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:04:15,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 479 [2023-11-17 16:04:15,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1041 transitions, 24111 flow. Second operand has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:15,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:15,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 479 [2023-11-17 16:04:15,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:19,390 INFO L124 PetriNetUnfolderBase]: 6114/10620 cut-off events. [2023-11-17 16:04:19,391 INFO L125 PetriNetUnfolderBase]: For 211140/211140 co-relation queries the response was YES. [2023-11-17 16:04:19,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98371 conditions, 10620 events. 6114/10620 cut-off events. For 211140/211140 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 79256 event pairs, 888 based on Foata normal form. 2/10622 useless extension candidates. Maximal degree in co-relation 98276. Up to 3623 conditions per place. [2023-11-17 16:04:19,508 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 826 selfloop transitions, 439 changer transitions 7/1272 dead transitions. [2023-11-17 16:04:19,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1272 transitions, 30112 flow [2023-11-17 16:04:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:04:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:04:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4197 transitions. [2023-11-17 16:04:19,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33700016059097476 [2023-11-17 16:04:19,511 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4197 transitions. [2023-11-17 16:04:19,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4197 transitions. [2023-11-17 16:04:19,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:19,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4197 transitions. [2023-11-17 16:04:19,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 161.42307692307693) internal successors, (4197), 26 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:19,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:19,520 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 479.0) internal successors, (12933), 27 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:19,520 INFO L175 Difference]: Start difference. First operand has 370 places, 1041 transitions, 24111 flow. Second operand 26 states and 4197 transitions. [2023-11-17 16:04:19,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1272 transitions, 30112 flow [2023-11-17 16:04:22,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1272 transitions, 29168 flow, removed 24 selfloop flow, removed 23 redundant places. [2023-11-17 16:04:22,351 INFO L231 Difference]: Finished difference. Result has 369 places, 1038 transitions, 24024 flow [2023-11-17 16:04:22,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=23207, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24024, PETRI_PLACES=369, PETRI_TRANSITIONS=1038} [2023-11-17 16:04:22,352 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 344 predicate places. [2023-11-17 16:04:22,352 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1038 transitions, 24024 flow [2023-11-17 16:04:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.96875) internal successors, (5023), 32 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:22,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:22,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:22,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-11-17 16:04:22,553 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1756357538, now seen corresponding path program 22 times [2023-11-17 16:04:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739142201] [2023-11-17 16:04:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739142201] [2023-11-17 16:04:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739142201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304040354] [2023-11-17 16:04:22,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:22,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:22,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:22,671 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:22,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-17 16:04:22,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:22,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:22,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:04:22,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:22,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:23,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304040354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:23,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:23,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-17 16:04:23,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744004939] [2023-11-17 16:04:23,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:23,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:04:23,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:04:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:04:23,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 479 [2023-11-17 16:04:23,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1038 transitions, 24024 flow. Second operand has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:23,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:23,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 479 [2023-11-17 16:04:23,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:26,223 INFO L124 PetriNetUnfolderBase]: 6024/10520 cut-off events. [2023-11-17 16:04:26,223 INFO L125 PetriNetUnfolderBase]: For 214163/214163 co-relation queries the response was YES. [2023-11-17 16:04:26,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96076 conditions, 10520 events. 6024/10520 cut-off events. For 214163/214163 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 78546 event pairs, 1020 based on Foata normal form. 80/10600 useless extension candidates. Maximal degree in co-relation 95983. Up to 3621 conditions per place. [2023-11-17 16:04:26,344 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 652 selfloop transitions, 548 changer transitions 0/1200 dead transitions. [2023-11-17 16:04:26,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1200 transitions, 29195 flow [2023-11-17 16:04:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:04:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:04:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2683 transitions. [2023-11-17 16:04:26,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734168406402227 [2023-11-17 16:04:26,347 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2683 transitions. [2023-11-17 16:04:26,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2683 transitions. [2023-11-17 16:04:26,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:26,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2683 transitions. [2023-11-17 16:04:26,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.86666666666667) internal successors, (2683), 15 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:26,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:26,352 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:26,352 INFO L175 Difference]: Start difference. First operand has 369 places, 1038 transitions, 24024 flow. Second operand 15 states and 2683 transitions. [2023-11-17 16:04:26,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1200 transitions, 29195 flow [2023-11-17 16:04:28,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1200 transitions, 28086 flow, removed 12 selfloop flow, removed 30 redundant places. [2023-11-17 16:04:28,944 INFO L231 Difference]: Finished difference. Result has 352 places, 1095 transitions, 25738 flow [2023-11-17 16:04:28,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=21996, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=25738, PETRI_PLACES=352, PETRI_TRANSITIONS=1095} [2023-11-17 16:04:28,944 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 327 predicate places. [2023-11-17 16:04:28,945 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1095 transitions, 25738 flow [2023-11-17 16:04:28,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:28,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:28,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:28,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-11-17 16:04:29,151 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:29,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash -207474901, now seen corresponding path program 1 times [2023-11-17 16:04:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:29,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601770551] [2023-11-17 16:04:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:29,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601770551] [2023-11-17 16:04:29,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601770551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877351713] [2023-11-17 16:04:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:29,213 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:29,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-17 16:04:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:29,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:04:29,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:29,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:29,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877351713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:29,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:29,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-17 16:04:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754834494] [2023-11-17 16:04:29,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:04:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:04:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:04:29,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 479 [2023-11-17 16:04:29,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1095 transitions, 25738 flow. Second operand has 16 states, 16 states have (on average 175.0625) internal successors, (2801), 16 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:29,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:29,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 479 [2023-11-17 16:04:29,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:31,120 INFO L124 PetriNetUnfolderBase]: 2590/4722 cut-off events. [2023-11-17 16:04:31,120 INFO L125 PetriNetUnfolderBase]: For 124105/124105 co-relation queries the response was YES. [2023-11-17 16:04:31,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50577 conditions, 4722 events. 2590/4722 cut-off events. For 124105/124105 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31390 event pairs, 622 based on Foata normal form. 298/5020 useless extension candidates. Maximal degree in co-relation 50490. Up to 2810 conditions per place. [2023-11-17 16:04:31,166 INFO L140 encePairwiseOnDemand]: 471/479 looper letters, 305 selfloop transitions, 9 changer transitions 455/769 dead transitions. [2023-11-17 16:04:31,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 769 transitions, 20047 flow [2023-11-17 16:04:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:04:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:04:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3027 transitions. [2023-11-17 16:04:31,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717303205206926 [2023-11-17 16:04:31,168 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3027 transitions. [2023-11-17 16:04:31,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3027 transitions. [2023-11-17 16:04:31,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:31,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3027 transitions. [2023-11-17 16:04:31,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 178.05882352941177) internal successors, (3027), 17 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:31,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:31,173 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:31,173 INFO L175 Difference]: Start difference. First operand has 352 places, 1095 transitions, 25738 flow. Second operand 17 states and 3027 transitions. [2023-11-17 16:04:31,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 769 transitions, 20047 flow [2023-11-17 16:04:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 769 transitions, 19558 flow, removed 57 selfloop flow, removed 28 redundant places. [2023-11-17 16:04:32,480 INFO L231 Difference]: Finished difference. Result has 327 places, 314 transitions, 6429 flow [2023-11-17 16:04:32,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=17392, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6429, PETRI_PLACES=327, PETRI_TRANSITIONS=314} [2023-11-17 16:04:32,480 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2023-11-17 16:04:32,480 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 314 transitions, 6429 flow [2023-11-17 16:04:32,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.0625) internal successors, (2801), 16 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:32,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:32,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:32,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:32,681 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:32,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1296942912, now seen corresponding path program 23 times [2023-11-17 16:04:32,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:32,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672763424] [2023-11-17 16:04:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:32,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:33,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672763424] [2023-11-17 16:04:33,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672763424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:33,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86228895] [2023-11-17 16:04:33,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:04:33,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:33,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:33,033 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:33,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-17 16:04:33,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:04:33,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:33,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:04:33,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:04:33,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:33,631 INFO L349 Elim1Store]: treesize reduction 13, result has 93.4 percent of original size [2023-11-17 16:04:33,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 208 [2023-11-17 16:04:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:04:38,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86228895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:38,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:38,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 16:04:38,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821276637] [2023-11-17 16:04:38,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:38,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:04:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:04:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:04:38,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 479 [2023-11-17 16:04:38,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 314 transitions, 6429 flow. Second operand has 30 states, 30 states have (on average 147.93333333333334) internal successors, (4438), 30 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:38,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:38,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 479 [2023-11-17 16:04:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:39,837 INFO L124 PetriNetUnfolderBase]: 2217/3659 cut-off events. [2023-11-17 16:04:39,837 INFO L125 PetriNetUnfolderBase]: For 57186/57186 co-relation queries the response was YES. [2023-11-17 16:04:39,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32716 conditions, 3659 events. 2217/3659 cut-off events. For 57186/57186 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20730 event pairs, 186 based on Foata normal form. 56/3715 useless extension candidates. Maximal degree in co-relation 32643. Up to 1146 conditions per place. [2023-11-17 16:04:39,870 INFO L140 encePairwiseOnDemand]: 465/479 looper letters, 324 selfloop transitions, 139 changer transitions 0/463 dead transitions. [2023-11-17 16:04:39,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 463 transitions, 9653 flow [2023-11-17 16:04:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:04:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:04:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2281 transitions. [2023-11-17 16:04:39,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3174669450243563 [2023-11-17 16:04:39,872 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2281 transitions. [2023-11-17 16:04:39,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2281 transitions. [2023-11-17 16:04:39,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:39,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2281 transitions. [2023-11-17 16:04:39,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 152.06666666666666) internal successors, (2281), 15 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,877 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,877 INFO L175 Difference]: Start difference. First operand has 327 places, 314 transitions, 6429 flow. Second operand 15 states and 2281 transitions. [2023-11-17 16:04:39,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 463 transitions, 9653 flow [2023-11-17 16:04:40,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 463 transitions, 8817 flow, removed 65 selfloop flow, removed 37 redundant places. [2023-11-17 16:04:40,174 INFO L231 Difference]: Finished difference. Result has 200 places, 336 transitions, 6513 flow [2023-11-17 16:04:40,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6513, PETRI_PLACES=200, PETRI_TRANSITIONS=336} [2023-11-17 16:04:40,175 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 175 predicate places. [2023-11-17 16:04:40,175 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 336 transitions, 6513 flow [2023-11-17 16:04:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 147.93333333333334) internal successors, (4438), 30 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:40,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:40,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:40,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-17 16:04:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:40,376 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash -956437476, now seen corresponding path program 24 times [2023-11-17 16:04:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893282422] [2023-11-17 16:04:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893282422] [2023-11-17 16:04:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893282422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969796483] [2023-11-17 16:04:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:04:40,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:40,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:40,732 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:40,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-17 16:04:41,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:04:41,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:41,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 16:04:41,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:41,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:43,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:43,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 283 treesize of output 1007 Received shutdown request... [2023-11-17 16:05:49,725 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:05:49,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-11-17 16:05:49,749 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:05:49,749 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:05:49,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:49,930 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-4-3-3-3-4-3-4-4-3-4-3-4-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-60-6-3-7-3-4-4-4-3-4-4-4-4-5-4-5-3-4-3-3-1 context. [2023-11-17 16:05:49,932 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:05:49,932 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:05:49,932 INFO L445 BasicCegarLoop]: Path program histogram: [24, 18, 17, 14, 6, 5, 2, 2, 1, 1, 1, 1, 1] [2023-11-17 16:05:49,934 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:05:49,934 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:05:49,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:05:49 BasicIcfg [2023-11-17 16:05:49,938 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:05:49,938 INFO L158 Benchmark]: Toolchain (without parser) took 516059.09ms. Allocated memory was 374.3MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 335.3MB in the beginning and 614.3MB in the end (delta: -278.9MB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. [2023-11-17 16:05:49,938 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 202.4MB. Free memory is still 150.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:05:49,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.84ms. Allocated memory is still 374.3MB. Free memory was 335.3MB in the beginning and 323.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:05:49,939 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.53ms. Allocated memory is still 374.3MB. Free memory was 323.3MB in the beginning and 321.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:05:49,939 INFO L158 Benchmark]: Boogie Preprocessor took 30.09ms. Allocated memory is still 374.3MB. Free memory was 321.2MB in the beginning and 319.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:05:49,939 INFO L158 Benchmark]: RCFGBuilder took 446.50ms. Allocated memory is still 374.3MB. Free memory was 319.1MB in the beginning and 299.2MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 16:05:49,939 INFO L158 Benchmark]: TraceAbstraction took 515349.13ms. Allocated memory was 374.3MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 298.6MB in the beginning and 614.3MB in the end (delta: -315.6MB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. [2023-11-17 16:05:49,940 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 202.4MB. Free memory is still 150.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.84ms. Allocated memory is still 374.3MB. Free memory was 335.3MB in the beginning and 323.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.53ms. Allocated memory is still 374.3MB. Free memory was 323.3MB in the beginning and 321.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.09ms. Allocated memory is still 374.3MB. Free memory was 321.2MB in the beginning and 319.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 446.50ms. Allocated memory is still 374.3MB. Free memory was 319.1MB in the beginning and 299.2MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 515349.13ms. Allocated memory was 374.3MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 298.6MB in the beginning and 614.3MB in the end (delta: -315.6MB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 209 PlacesBefore, 25 PlacesAfterwards, 223 TransitionsBefore, 25 TransitionsAfterwards, 3008 CoEnabledTransitionPairs, 7 FixpointIterations, 126 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 32 TrivialYvCompositions, 18 ConcurrentYvCompositions, 14 ChoiceCompositions, 245 TotalNumberOfCompositions, 3462 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3098, independent: 3031, independent conditional: 0, independent unconditional: 3031, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2344, independent: 2317, independent conditional: 0, independent unconditional: 2317, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2344, independent: 2317, independent conditional: 0, independent unconditional: 2317, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 27, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 60, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3098, independent: 714, independent conditional: 0, independent unconditional: 714, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 2344, unknown conditional: 0, unknown unconditional: 2344] , Statistics on independence cache: Total cache size (in pairs): 92, Positive cache size: 85, Positive conditional cache size: 0, Positive unconditional cache size: 85, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-4-3-3-3-4-3-4-4-3-4-3-4-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-60-6-3-7-3-4-4-4-3-4-4-4-4-5-4-5-3-4-3-3-1 context. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-4-3-3-3-4-3-4-4-3-4-3-4-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-60-6-3-7-3-4-4-4-3-4-4-4-4-5-4-5-3-4-3-3-1 context. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-4-3-3-3-4-3-4-4-3-4-3-4-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-60-6-3-7-3-4-4-4-3-4-4-4-4-5-4-5-3-4-3-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 272 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 515.3s, OverallIterations: 93, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 327.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 11005 SdHoareTripleChecker+Valid, 28.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11005 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 24.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 110 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 521 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54299 IncrementalHoareTripleChecker+Invalid, 54933 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 521 mSolverCounterUnsat, 0 mSDtfsCounter, 54299 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3947 GetRequests, 1363 SyntacticMatches, 7 SemanticMatches, 2577 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24570 ImplicationChecksByTransitivity, 56.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36299occurred in iteration=74, InterpolantAutomatonStates: 1401, 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: 0.9s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 88.4s InterpolantComputationTime, 3138 NumberOfCodeBlocks, 3110 NumberOfCodeBlocksAsserted, 203 NumberOfCheckSat, 3969 ConstructedInterpolants, 111 QuantifiedInterpolants, 65224 SizeOfPredicates, 1219 NumberOfNonLiveVariables, 14279 ConjunctsInSsa, 1800 ConjunctsInUnsatCore, 212 InterpolantComputations, 54 PerfectInterpolantSequences, 342/753 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown