/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/unroll-cond-5.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:38:40,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:38:40,826 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 16:38:40,850 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:38:40,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:38:40,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:38:40,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:38:40,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:38:40,853 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:38:40,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:38:40,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:38:40,856 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:38:40,856 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:38:40,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:38:40,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:38:40,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:38:40,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:38:40,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:38:40,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:38:40,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:38:40,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:38:40,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:38:40,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:38:40,860 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:38:40,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:38:40,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:38:40,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:38:40,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:38:40,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:38:40,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:38:40,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:38:40,862 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:38:40,862 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:38:41,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:38:41,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:38:41,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:38:41,060 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:38:41,062 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:38:41,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-11-17 16:38:42,173 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:38:42,327 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:38:42,328 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-11-17 16:38:42,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aa460c0/8bd1d2156c4f472998c11e4df14f4c01/FLAGac465078d [2023-11-17 16:38:42,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aa460c0/8bd1d2156c4f472998c11e4df14f4c01 [2023-11-17 16:38:42,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:38:42,345 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:38:42,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:38:42,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:38:42,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:38:42,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5609eb71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42, skipping insertion in model container [2023-11-17 16:38:42,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,375 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:38:42,488 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/unroll-cond-5.wvr.c[3001,3014] [2023-11-17 16:38:42,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:38:42,499 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:38:42,514 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/unroll-cond-5.wvr.c[3001,3014] [2023-11-17 16:38:42,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:38:42,525 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:38:42,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42 WrapperNode [2023-11-17 16:38:42,526 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:38:42,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:38:42,527 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:38:42,527 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:38:42,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,554 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 209 [2023-11-17 16:38:42,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:38:42,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:38:42,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:38:42,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:38:42,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,564 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,564 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:38:42,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:38:42,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:38:42,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:38:42,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (1/1) ... [2023-11-17 16:38:42,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:38:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:42,625 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 16:38:42,631 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 16:38:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:38:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:38:42,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:38:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:38:42,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:38:42,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:38:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:38:42,656 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 16:38:42,733 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:38:42,734 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:38:42,998 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:38:43,011 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:38:43,012 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:38:43,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:38:43 BoogieIcfgContainer [2023-11-17 16:38:43,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:38:43,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:38:43,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:38:43,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:38:43,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:38:42" (1/3) ... [2023-11-17 16:38:43,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2801e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:38:43, skipping insertion in model container [2023-11-17 16:38:43,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:42" (2/3) ... [2023-11-17 16:38:43,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2801e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:38:43, skipping insertion in model container [2023-11-17 16:38:43,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:38:43" (3/3) ... [2023-11-17 16:38:43,019 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-11-17 16:38:43,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:38:43,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:38:43,031 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:38:43,108 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:38:43,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 271 transitions, 556 flow [2023-11-17 16:38:43,223 INFO L124 PetriNetUnfolderBase]: 24/269 cut-off events. [2023-11-17 16:38:43,223 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:38:43,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 269 events. 24/269 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 516 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2023-11-17 16:38:43,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 271 transitions, 556 flow [2023-11-17 16:38:43,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 260 transitions, 532 flow [2023-11-17 16:38:43,241 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:38:43,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 260 transitions, 532 flow [2023-11-17 16:38:43,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 260 transitions, 532 flow [2023-11-17 16:38:43,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 260 transitions, 532 flow [2023-11-17 16:38:43,318 INFO L124 PetriNetUnfolderBase]: 24/260 cut-off events. [2023-11-17 16:38:43,318 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:38:43,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 260 events. 24/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 496 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2023-11-17 16:38:43,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 7992 [2023-11-17 16:39:00,654 WARN L293 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 195 DAG size of output: 192 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-17 16:39:03,928 INFO L134 LiptonReduction]: Checked pairs total: 7284 [2023-11-17 16:39:03,928 INFO L136 LiptonReduction]: Total number of compositions: 316 [2023-11-17 16:39:03,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:39:03,976 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;@6bb94714, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:39:03,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:39:03,982 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:39:03,982 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:39:03,983 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:39:03,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:03,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:03,984 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 16:39:03,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash 932768647, now seen corresponding path program 1 times [2023-11-17 16:39:03,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:03,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345433736] [2023-11-17 16:39:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:03,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:04,312 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 16:39:04,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:04,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345433736] [2023-11-17 16:39:04,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345433736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:04,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:04,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:39:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710333616] [2023-11-17 16:39:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:04,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:39:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:39:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:39:04,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 587 [2023-11-17 16:39:04,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:04,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:04,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 587 [2023-11-17 16:39:04,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:04,414 INFO L124 PetriNetUnfolderBase]: 41/76 cut-off events. [2023-11-17 16:39:04,414 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-17 16:39:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-17 16:39:04,415 INFO L140 encePairwiseOnDemand]: 584/587 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-17 16:39:04,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-11-17 16:39:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:39:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:39:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2023-11-17 16:39:04,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128336172629188 [2023-11-17 16:39:04,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2023-11-17 16:39:04,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2023-11-17 16:39:04,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:04,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2023-11-17 16:39:04,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:04,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:04,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:04,468 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 727 transitions. [2023-11-17 16:39:04,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-11-17 16:39:04,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:39:04,471 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-17 16:39:04,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-17 16:39:04,478 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:39:04,478 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-17 16:39:04,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:04,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:04,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:04,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:39:04,479 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 16:39:04,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1478823390, now seen corresponding path program 1 times [2023-11-17 16:39:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:04,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612018731] [2023-11-17 16:39:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:04,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:04,854 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 16:39:04,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612018731] [2023-11-17 16:39:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612018731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:04,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:04,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:39:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283980003] [2023-11-17 16:39:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:39:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:39:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:39:04,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:39:04,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:04,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:04,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:39:04,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:05,016 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-11-17 16:39:05,017 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:39:05,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-11-17 16:39:05,017 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-11-17 16:39:05,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-11-17 16:39:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:39:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:39:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-11-17 16:39:05,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37649063032367974 [2023-11-17 16:39:05,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-11-17 16:39:05,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-11-17 16:39:05,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:05,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-11-17 16:39:05,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,027 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,027 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1105 transitions. [2023-11-17 16:39:05,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-11-17 16:39:05,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:39:05,028 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-11-17 16:39:05,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-17 16:39:05,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:39:05,029 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-11-17 16:39:05,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:05,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:05,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:39:05,030 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 16:39:05,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1345868976, now seen corresponding path program 2 times [2023-11-17 16:39:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:05,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735302615] [2023-11-17 16:39:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:05,160 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 16:39:05,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735302615] [2023-11-17 16:39:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735302615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:39:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677381045] [2023-11-17 16:39:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:05,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:39:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:39:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:39:05,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:39:05,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:05,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:39:05,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:05,291 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2023-11-17 16:39:05,291 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-11-17 16:39:05,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 651 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-11-17 16:39:05,293 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-17 16:39:05,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-11-17 16:39:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:39:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:39:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1101 transitions. [2023-11-17 16:39:05,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3751277683134583 [2023-11-17 16:39:05,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1101 transitions. [2023-11-17 16:39:05,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1101 transitions. [2023-11-17 16:39:05,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:05,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1101 transitions. [2023-11-17 16:39:05,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,302 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 1101 transitions. [2023-11-17 16:39:05,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-11-17 16:39:05,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 16:39:05,304 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-11-17 16:39:05,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-17 16:39:05,305 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-11-17 16:39:05,305 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-11-17 16:39:05,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:05,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:05,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:39:05,306 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 16:39:05,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1337174890, now seen corresponding path program 3 times [2023-11-17 16:39:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:05,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257973885] [2023-11-17 16:39:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:05,429 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 16:39:05,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:05,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257973885] [2023-11-17 16:39:05,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257973885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:05,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:05,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:39:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458018179] [2023-11-17 16:39:05,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:39:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:39:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:39:05,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:39:05,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:05,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:39:05,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:05,573 INFO L124 PetriNetUnfolderBase]: 121/224 cut-off events. [2023-11-17 16:39:05,573 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-11-17 16:39:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 718 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-11-17 16:39:05,575 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-11-17 16:39:05,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-11-17 16:39:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:39:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:39:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1106 transitions. [2023-11-17 16:39:05,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768313458262351 [2023-11-17 16:39:05,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1106 transitions. [2023-11-17 16:39:05,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1106 transitions. [2023-11-17 16:39:05,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:05,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1106 transitions. [2023-11-17 16:39:05,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.2) internal successors, (1106), 5 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,585 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 1106 transitions. [2023-11-17 16:39:05,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-11-17 16:39:05,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-17 16:39:05,590 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-11-17 16:39:05,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-17 16:39:05,591 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-11-17 16:39:05,591 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-11-17 16:39:05,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:05,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:05,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:39:05,593 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 16:39:05,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1231721312, now seen corresponding path program 4 times [2023-11-17 16:39:05,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:05,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891387817] [2023-11-17 16:39:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:05,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:05,802 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 16:39:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891387817] [2023-11-17 16:39:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891387817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:39:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492241675] [2023-11-17 16:39:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:39:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:39:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:39:05,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:39:05,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:05,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:39:05,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:05,913 INFO L124 PetriNetUnfolderBase]: 117/220 cut-off events. [2023-11-17 16:39:05,914 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-11-17 16:39:05,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 716 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-11-17 16:39:05,916 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-11-17 16:39:05,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-11-17 16:39:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:39:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:39:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-11-17 16:39:05,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747870528109029 [2023-11-17 16:39:05,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-11-17 16:39:05,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-11-17 16:39:05,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:05,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-11-17 16:39:05,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,930 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 1100 transitions. [2023-11-17 16:39:05,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-11-17 16:39:05,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 16:39:05,933 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-11-17 16:39:05,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-17 16:39:05,936 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-17 16:39:05,936 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-11-17 16:39:05,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:05,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:05,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:05,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:39:05,937 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 16:39:05,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash -566645678, now seen corresponding path program 5 times [2023-11-17 16:39:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711390462] [2023-11-17 16:39:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:06,117 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 16:39:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711390462] [2023-11-17 16:39:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711390462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:06,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:06,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:39:06,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501590381] [2023-11-17 16:39:06,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:06,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:39:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:39:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:39:06,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:39:06,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:06,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:39:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:06,235 INFO L124 PetriNetUnfolderBase]: 118/223 cut-off events. [2023-11-17 16:39:06,235 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-11-17 16:39:06,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 734 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-11-17 16:39:06,236 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-11-17 16:39:06,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-11-17 16:39:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:39:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:39:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1104 transitions. [2023-11-17 16:39:06,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37614991482112436 [2023-11-17 16:39:06,264 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1104 transitions. [2023-11-17 16:39:06,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1104 transitions. [2023-11-17 16:39:06,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:06,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1104 transitions. [2023-11-17 16:39:06,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.8) internal successors, (1104), 5 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,270 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 1104 transitions. [2023-11-17 16:39:06,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-11-17 16:39:06,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-17 16:39:06,274 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-11-17 16:39:06,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-17 16:39:06,275 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-17 16:39:06,276 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-11-17 16:39:06,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:06,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:06,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:39:06,276 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 16:39:06,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash 510780286, now seen corresponding path program 6 times [2023-11-17 16:39:06,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:06,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095440341] [2023-11-17 16:39:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:06,449 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 16:39:06,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095440341] [2023-11-17 16:39:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095440341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:39:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:39:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:39:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336044434] [2023-11-17 16:39:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:39:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:39:06,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:39:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:39:06,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:39:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:06,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:39:06,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:06,562 INFO L124 PetriNetUnfolderBase]: 117/216 cut-off events. [2023-11-17 16:39:06,562 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2023-11-17 16:39:06,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 689 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-11-17 16:39:06,563 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-11-17 16:39:06,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-11-17 16:39:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:39:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:39:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-11-17 16:39:06,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747870528109029 [2023-11-17 16:39:06,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-11-17 16:39:06,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-11-17 16:39:06,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:06,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-11-17 16:39:06,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,573 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 587.0) internal successors, (3522), 6 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,573 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 1100 transitions. [2023-11-17 16:39:06,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-11-17 16:39:06,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 16:39:06,576 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-11-17 16:39:06,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-17 16:39:06,577 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-11-17 16:39:06,577 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-11-17 16:39:06,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:06,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:06,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:39:06,580 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 16:39:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1626702911, now seen corresponding path program 1 times [2023-11-17 16:39:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850213287] [2023-11-17 16:39:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:06,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850213287] [2023-11-17 16:39:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850213287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533905240] [2023-11-17 16:39:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:06,807 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 16:39:06,838 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 16:39:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:06,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:39:06,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:07,286 INFO L349 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-11-17 16:39:07,287 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 267 treesize of output 244 [2023-11-17 16:39:07,541 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 16:39:07,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:29,156 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-11-17 16:39:29,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 151 [2023-11-17 16:39:29,543 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 16:39:29,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533905240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:29,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:29,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-17 16:39:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310923694] [2023-11-17 16:39:29,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:39:29,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:39:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:39:29,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 587 [2023-11-17 16:39:29,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 20 states, 20 states have (on average 155.4) internal successors, (3108), 20 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:29,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:29,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 587 [2023-11-17 16:39:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:37,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:39:46,194 WARN L293 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 142 DAG size of output: 123 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:39:47,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:39:53,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:39:58,463 INFO L124 PetriNetUnfolderBase]: 522/990 cut-off events. [2023-11-17 16:39:58,464 INFO L125 PetriNetUnfolderBase]: For 2455/2455 co-relation queries the response was YES. [2023-11-17 16:39:58,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3870 conditions, 990 events. 522/990 cut-off events. For 2455/2455 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5227 event pairs, 30 based on Foata normal form. 9/837 useless extension candidates. Maximal degree in co-relation 3274. Up to 313 conditions per place. [2023-11-17 16:39:58,470 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 111 selfloop transitions, 78 changer transitions 80/269 dead transitions. [2023-11-17 16:39:58,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 269 transitions, 2002 flow [2023-11-17 16:39:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:39:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:39:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4670 transitions. [2023-11-17 16:39:58,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27433472360923455 [2023-11-17 16:39:58,479 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4670 transitions. [2023-11-17 16:39:58,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4670 transitions. [2023-11-17 16:39:58,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:58,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4670 transitions. [2023-11-17 16:39:58,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 161.0344827586207) internal successors, (4670), 29 states have internal predecessors, (4670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:58,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 587.0) internal successors, (17610), 30 states have internal predecessors, (17610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:58,515 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 587.0) internal successors, (17610), 30 states have internal predecessors, (17610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:58,515 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 29 states and 4670 transitions. [2023-11-17 16:39:58,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 269 transitions, 2002 flow [2023-11-17 16:39:58,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 269 transitions, 1878 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 16:39:58,526 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 1096 flow [2023-11-17 16:39:58,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1096, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-11-17 16:39:58,528 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-11-17 16:39:58,528 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 1096 flow [2023-11-17 16:39:58,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 155.4) internal successors, (3108), 20 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:58,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:58,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:58,537 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 16:39:58,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:58,735 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 16:39:58,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -918882375, now seen corresponding path program 2 times [2023-11-17 16:39:58,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:58,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396857664] [2023-11-17 16:39:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396857664] [2023-11-17 16:39:58,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396857664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119484083] [2023-11-17 16:39:58,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:39:58,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:58,993 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 16:39:59,022 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 16:39:59,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:39:59,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:59,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:39:59,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:59,418 INFO L349 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-11-17 16:39:59,418 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 267 treesize of output 244 [2023-11-17 16:39:59,710 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 16:39:59,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:12,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 3 [2023-11-17 16:40:12,825 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-17 16:40:12,825 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 47 [2023-11-17 16:40:12,928 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-11-17 16:40:12,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 151 [2023-11-17 16:40:13,202 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:40:13,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 16:40:13,212 INFO L349 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-11-17 16:40:13,212 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 1 [2023-11-17 16:40:13,339 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 16:40:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119484083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:13,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-17 16:40:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815105319] [2023-11-17 16:40:13,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:40:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:40:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:40:13,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 587 [2023-11-17 16:40:13,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 1096 flow. Second operand has 18 states, 18 states have (on average 155.66666666666666) internal successors, (2802), 18 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:13,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:13,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 587 [2023-11-17 16:40:13,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:15,150 INFO L124 PetriNetUnfolderBase]: 364/768 cut-off events. [2023-11-17 16:40:15,150 INFO L125 PetriNetUnfolderBase]: For 3800/3800 co-relation queries the response was YES. [2023-11-17 16:40:15,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3850 conditions, 768 events. 364/768 cut-off events. For 3800/3800 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4191 event pairs, 99 based on Foata normal form. 9/770 useless extension candidates. Maximal degree in co-relation 3682. Up to 550 conditions per place. [2023-11-17 16:40:15,154 INFO L140 encePairwiseOnDemand]: 577/587 looper letters, 97 selfloop transitions, 58 changer transitions 14/169 dead transitions. [2023-11-17 16:40:15,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 169 transitions, 1789 flow [2023-11-17 16:40:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:40:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:40:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3016 transitions. [2023-11-17 16:40:15,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2704205146597328 [2023-11-17 16:40:15,182 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3016 transitions. [2023-11-17 16:40:15,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3016 transitions. [2023-11-17 16:40:15,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:15,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3016 transitions. [2023-11-17 16:40:15,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 158.73684210526315) internal successors, (3016), 19 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:15,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 587.0) internal successors, (11740), 20 states have internal predecessors, (11740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:15,198 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 587.0) internal successors, (11740), 20 states have internal predecessors, (11740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:15,198 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 1096 flow. Second operand 19 states and 3016 transitions. [2023-11-17 16:40:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 169 transitions, 1789 flow [2023-11-17 16:40:15,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 169 transitions, 1536 flow, removed 103 selfloop flow, removed 7 redundant places. [2023-11-17 16:40:15,216 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1145 flow [2023-11-17 16:40:15,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1145, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2023-11-17 16:40:15,217 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-11-17 16:40:15,217 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1145 flow [2023-11-17 16:40:15,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 155.66666666666666) internal successors, (2802), 18 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:15,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:15,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:15,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 16:40:15,423 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,SelfDestructingSolverStorable8 [2023-11-17 16:40:15,423 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 16:40:15,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1225680311, now seen corresponding path program 3 times [2023-11-17 16:40:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:15,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399859482] [2023-11-17 16:40:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:40:15,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:15,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399859482] [2023-11-17 16:40:15,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399859482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:15,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758262093] [2023-11-17 16:40:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:40:15,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:15,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:15,741 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 16:40:15,743 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 16:40:15,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:40:15,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:15,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:40:15,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:16,220 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 16:40:16,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:16,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:16,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 334 treesize of output 374 [2023-11-17 16:40:42,823 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 16:40:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758262093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:42,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:42,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-17 16:40:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782753021] [2023-11-17 16:40:42,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:42,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:40:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:40:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:40:42,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 587 [2023-11-17 16:40:42,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1145 flow. Second operand has 18 states, 18 states have (on average 155.66666666666666) internal successors, (2802), 18 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:42,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:42,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 587 [2023-11-17 16:40:42,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:43,663 INFO L124 PetriNetUnfolderBase]: 362/770 cut-off events. [2023-11-17 16:40:43,663 INFO L125 PetriNetUnfolderBase]: For 2711/2711 co-relation queries the response was YES. [2023-11-17 16:40:43,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3647 conditions, 770 events. 362/770 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4247 event pairs, 102 based on Foata normal form. 8/771 useless extension candidates. Maximal degree in co-relation 3506. Up to 489 conditions per place. [2023-11-17 16:40:43,667 INFO L140 encePairwiseOnDemand]: 577/587 looper letters, 94 selfloop transitions, 38 changer transitions 32/164 dead transitions. [2023-11-17 16:40:43,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 164 transitions, 1695 flow [2023-11-17 16:40:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:40:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:40:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2850 transitions. [2023-11-17 16:40:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26973310618966495 [2023-11-17 16:40:43,674 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2850 transitions. [2023-11-17 16:40:43,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2850 transitions. [2023-11-17 16:40:43,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:43,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2850 transitions. [2023-11-17 16:40:43,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.33333333333334) internal successors, (2850), 18 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:43,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 587.0) internal successors, (11153), 19 states have internal predecessors, (11153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:43,690 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 587.0) internal successors, (11153), 19 states have internal predecessors, (11153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:43,690 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1145 flow. Second operand 18 states and 2850 transitions. [2023-11-17 16:40:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 164 transitions, 1695 flow [2023-11-17 16:40:43,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 164 transitions, 1592 flow, removed 16 selfloop flow, removed 7 redundant places. [2023-11-17 16:40:43,703 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 982 flow [2023-11-17 16:40:43,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=982, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2023-11-17 16:40:43,703 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 91 predicate places. [2023-11-17 16:40:43,704 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 982 flow [2023-11-17 16:40:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 155.66666666666666) internal successors, (2802), 18 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:43,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:43,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:43,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:40:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:43,910 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 16:40:43,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1095436621, now seen corresponding path program 4 times [2023-11-17 16:40:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020666580] [2023-11-17 16:40:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:40:44,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:44,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020666580] [2023-11-17 16:40:44,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020666580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:44,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251865055] [2023-11-17 16:40:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:40:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:44,160 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 16:40:44,162 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 16:40:44,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:40:44,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:44,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 16:40:44,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:44,293 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 16:40:44,335 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 16:40:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:40:44,439 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 16:40:44,674 INFO L349 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-11-17 16:40:44,675 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 267 treesize of output 244 [2023-11-17 16:40:44,843 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 16:40:44,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:04,899 WARN L293 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:41:05,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:05,844 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 467 treesize of output 275 [2023-11-17 16:41:05,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:05,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 1956 treesize of output 1700 [2023-11-17 16:41:06,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:06,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 336 treesize of output 356 [2023-11-17 16:41:06,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:06,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 345 treesize of output 237 [2023-11-17 16:41:42,704 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 16:41:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251865055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:42,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:42,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-17 16:41:42,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258529035] [2023-11-17 16:41:42,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:41:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:41:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=380, Unknown=2, NotChecked=0, Total=462 [2023-11-17 16:41:42,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 587 [2023-11-17 16:41:42,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 982 flow. Second operand has 22 states, 22 states have (on average 147.1818181818182) internal successors, (3238), 22 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:42,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:42,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 587 [2023-11-17 16:41:42,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:55,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:41:57,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:42:13,527 WARN L293 SmtUtils]: Spent 14.44s on a formula simplification. DAG size of input: 170 DAG size of output: 151 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:42:15,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:42:30,395 WARN L293 SmtUtils]: Spent 14.20s on a formula simplification. DAG size of input: 143 DAG size of output: 124 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:42:35,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:42:37,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:42:38,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:42:42,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:42:43,633 INFO L124 PetriNetUnfolderBase]: 410/838 cut-off events. [2023-11-17 16:42:43,634 INFO L125 PetriNetUnfolderBase]: For 3222/3222 co-relation queries the response was YES. [2023-11-17 16:42:43,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3921 conditions, 838 events. 410/838 cut-off events. For 3222/3222 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4556 event pairs, 60 based on Foata normal form. 17/842 useless extension candidates. Maximal degree in co-relation 3832. Up to 239 conditions per place. [2023-11-17 16:42:43,638 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 96 selfloop transitions, 68 changer transitions 80/244 dead transitions. [2023-11-17 16:42:43,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 244 transitions, 2203 flow [2023-11-17 16:42:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:42:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:42:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4980 transitions. [2023-11-17 16:42:43,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2570853337463218 [2023-11-17 16:42:43,645 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4980 transitions. [2023-11-17 16:42:43,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4980 transitions. [2023-11-17 16:42:43,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:43,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4980 transitions. [2023-11-17 16:42:43,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 150.9090909090909) internal successors, (4980), 33 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:43,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 587.0) internal successors, (19958), 34 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:43,678 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 587.0) internal successors, (19958), 34 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:43,679 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 982 flow. Second operand 33 states and 4980 transitions. [2023-11-17 16:42:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 244 transitions, 2203 flow [2023-11-17 16:42:43,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 244 transitions, 2067 flow, removed 23 selfloop flow, removed 16 redundant places. [2023-11-17 16:42:43,697 INFO L231 Difference]: Finished difference. Result has 138 places, 98 transitions, 1049 flow [2023-11-17 16:42:43,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1049, PETRI_PLACES=138, PETRI_TRANSITIONS=98} [2023-11-17 16:42:43,698 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2023-11-17 16:42:43,698 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 98 transitions, 1049 flow [2023-11-17 16:42:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 147.1818181818182) internal successors, (3238), 22 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:43,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:43,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:42:43,706 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 16:42:43,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:43,904 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 16:42:43,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:43,905 INFO L85 PathProgramCache]: Analyzing trace with hash 180428448, now seen corresponding path program 5 times [2023-11-17 16:42:43,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:43,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625108665] [2023-11-17 16:42:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:43,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:44,083 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 16:42:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625108665] [2023-11-17 16:42:44,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625108665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414602189] [2023-11-17 16:42:44,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:42:44,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:44,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:44,085 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 16:42:44,087 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 16:42:44,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:42:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:44,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 16:42:44,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:42:44,226 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 10 treesize of output 8 [2023-11-17 16:42:44,254 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 16:42:44,285 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 16:42:44,328 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 16:42:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:42:50,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:04,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:04,918 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 142 treesize of output 94 [2023-11-17 16:43:04,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:04,932 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 262 [2023-11-17 16:43:04,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:04,966 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 202 [2023-11-17 16:43:04,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:04,987 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 105 [2023-11-17 16:43:05,316 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 16:43:05,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:05,370 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 116 treesize of output 80 [2023-11-17 16:43:05,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:05,391 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 504 treesize of output 460 [2023-11-17 16:43:05,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:05,403 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 85 [2023-11-17 16:43:05,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:05,468 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2023-11-17 16:43:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:43:05,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414602189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:05,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:05,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-17 16:43:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320006812] [2023-11-17 16:43:05,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:05,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:43:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:43:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=348, Unknown=2, NotChecked=0, Total=420 [2023-11-17 16:43:05,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 587 [2023-11-17 16:43:05,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 98 transitions, 1049 flow. Second operand has 21 states, 21 states have (on average 147.42857142857142) internal successors, (3096), 21 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:05,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:05,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 587 [2023-11-17 16:43:05,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:07,715 INFO L124 PetriNetUnfolderBase]: 267/561 cut-off events. [2023-11-17 16:43:07,715 INFO L125 PetriNetUnfolderBase]: For 3206/3206 co-relation queries the response was YES. [2023-11-17 16:43:07,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 561 events. 267/561 cut-off events. For 3206/3206 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2782 event pairs, 17 based on Foata normal form. 8/568 useless extension candidates. Maximal degree in co-relation 2930. Up to 226 conditions per place. [2023-11-17 16:43:07,719 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 87 selfloop transitions, 56 changer transitions 32/175 dead transitions. [2023-11-17 16:43:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 175 transitions, 1814 flow [2023-11-17 16:43:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:43:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:43:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3899 transitions. [2023-11-17 16:43:07,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2554711047044948 [2023-11-17 16:43:07,723 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3899 transitions. [2023-11-17 16:43:07,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3899 transitions. [2023-11-17 16:43:07,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:07,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3899 transitions. [2023-11-17 16:43:07,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 149.96153846153845) internal successors, (3899), 26 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:07,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 587.0) internal successors, (15849), 27 states have internal predecessors, (15849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:07,734 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 587.0) internal successors, (15849), 27 states have internal predecessors, (15849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:07,734 INFO L175 Difference]: Start difference. First operand has 138 places, 98 transitions, 1049 flow. Second operand 26 states and 3899 transitions. [2023-11-17 16:43:07,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 175 transitions, 1814 flow [2023-11-17 16:43:07,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 175 transitions, 1560 flow, removed 71 selfloop flow, removed 34 redundant places. [2023-11-17 16:43:07,747 INFO L231 Difference]: Finished difference. Result has 123 places, 95 transitions, 1002 flow [2023-11-17 16:43:07,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1002, PETRI_PLACES=123, PETRI_TRANSITIONS=95} [2023-11-17 16:43:07,748 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-11-17 16:43:07,748 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 95 transitions, 1002 flow [2023-11-17 16:43:07,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 147.42857142857142) internal successors, (3096), 21 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:07,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:07,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:07,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:07,953 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,SelfDestructingSolverStorable11 [2023-11-17 16:43:07,955 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 16:43:07,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1556900307, now seen corresponding path program 1 times [2023-11-17 16:43:07,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:07,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229794229] [2023-11-17 16:43:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:08,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229794229] [2023-11-17 16:43:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229794229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954679502] [2023-11-17 16:43:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:08,173 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 16:43:08,210 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 16:43:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:08,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:43:08,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:08,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954679502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:08,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:08,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:43:08,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75294581] [2023-11-17 16:43:08,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:43:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:43:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:43:08,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:43:08,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 95 transitions, 1002 flow. Second operand has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:08,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:08,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:43:08,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:09,382 INFO L124 PetriNetUnfolderBase]: 260/531 cut-off events. [2023-11-17 16:43:09,382 INFO L125 PetriNetUnfolderBase]: For 2930/2930 co-relation queries the response was YES. [2023-11-17 16:43:09,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2830 conditions, 531 events. 260/531 cut-off events. For 2930/2930 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2588 event pairs, 27 based on Foata normal form. 16/546 useless extension candidates. Maximal degree in co-relation 2770. Up to 181 conditions per place. [2023-11-17 16:43:09,386 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 94 selfloop transitions, 59 changer transitions 0/153 dead transitions. [2023-11-17 16:43:09,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 153 transitions, 1635 flow [2023-11-17 16:43:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:43:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:43:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3503 transitions. [2023-11-17 16:43:09,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729770017035775 [2023-11-17 16:43:09,389 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3503 transitions. [2023-11-17 16:43:09,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3503 transitions. [2023-11-17 16:43:09,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:09,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3503 transitions. [2023-11-17 16:43:09,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 218.9375) internal successors, (3503), 16 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:09,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 587.0) internal successors, (9979), 17 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:09,397 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 587.0) internal successors, (9979), 17 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:09,397 INFO L175 Difference]: Start difference. First operand has 123 places, 95 transitions, 1002 flow. Second operand 16 states and 3503 transitions. [2023-11-17 16:43:09,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 153 transitions, 1635 flow [2023-11-17 16:43:09,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 153 transitions, 1445 flow, removed 37 selfloop flow, removed 22 redundant places. [2023-11-17 16:43:09,408 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 1066 flow [2023-11-17 16:43:09,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1066, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-11-17 16:43:09,409 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-11-17 16:43:09,409 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 1066 flow [2023-11-17 16:43:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:09,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:09,415 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 16:43:09,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:09,615 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 16:43:09,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash 826377375, now seen corresponding path program 2 times [2023-11-17 16:43:09,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:09,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392415978] [2023-11-17 16:43:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:09,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:09,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392415978] [2023-11-17 16:43:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392415978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242460989] [2023-11-17 16:43:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:43:09,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:09,791 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 16:43:09,829 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 16:43:09,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:43:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:09,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:43:09,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:10,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:10,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242460989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:10,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:10,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:43:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76504172] [2023-11-17 16:43:10,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:43:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:10,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:43:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:43:10,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:43:10,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 1066 flow. Second operand has 12 states, 12 states have (on average 215.33333333333334) internal successors, (2584), 12 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:10,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:10,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:43:10,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:11,397 INFO L124 PetriNetUnfolderBase]: 350/717 cut-off events. [2023-11-17 16:43:11,397 INFO L125 PetriNetUnfolderBase]: For 3841/3841 co-relation queries the response was YES. [2023-11-17 16:43:11,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3797 conditions, 717 events. 350/717 cut-off events. For 3841/3841 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3808 event pairs, 58 based on Foata normal form. 28/744 useless extension candidates. Maximal degree in co-relation 3745. Up to 257 conditions per place. [2023-11-17 16:43:11,401 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 133 selfloop transitions, 85 changer transitions 0/218 dead transitions. [2023-11-17 16:43:11,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 218 transitions, 2290 flow [2023-11-17 16:43:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:43:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:43:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4400 transitions. [2023-11-17 16:43:11,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747870528109029 [2023-11-17 16:43:11,405 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4400 transitions. [2023-11-17 16:43:11,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4400 transitions. [2023-11-17 16:43:11,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:11,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4400 transitions. [2023-11-17 16:43:11,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 220.0) internal successors, (4400), 20 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 587.0) internal successors, (12327), 21 states have internal predecessors, (12327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,415 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 587.0) internal successors, (12327), 21 states have internal predecessors, (12327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,415 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 1066 flow. Second operand 20 states and 4400 transitions. [2023-11-17 16:43:11,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 218 transitions, 2290 flow [2023-11-17 16:43:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 218 transitions, 2128 flow, removed 42 selfloop flow, removed 6 redundant places. [2023-11-17 16:43:11,431 INFO L231 Difference]: Finished difference. Result has 128 places, 143 transitions, 1763 flow [2023-11-17 16:43:11,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1763, PETRI_PLACES=128, PETRI_TRANSITIONS=143} [2023-11-17 16:43:11,432 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2023-11-17 16:43:11,432 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 143 transitions, 1763 flow [2023-11-17 16:43:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.33333333333334) internal successors, (2584), 12 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:11,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:11,453 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 16:43:11,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:11,639 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 16:43:11,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash 396100409, now seen corresponding path program 3 times [2023-11-17 16:43:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:11,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832411557] [2023-11-17 16:43:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832411557] [2023-11-17 16:43:11,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832411557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643158652] [2023-11-17 16:43:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:43:11,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:11,771 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 16:43:11,806 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 16:43:12,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:43:12,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:12,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:43:12,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:12,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:12,192 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 202 treesize of output 202 [2023-11-17 16:43:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:12,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:12,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:43:12,786 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 238 treesize of output 238 [2023-11-17 16:43:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:15,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643158652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:15,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:15,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:43:15,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548753883] [2023-11-17 16:43:15,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:43:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:43:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:43:15,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:43:15,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 143 transitions, 1763 flow. Second operand has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:15,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:15,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:43:15,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:17,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:43:18,546 INFO L124 PetriNetUnfolderBase]: 346/689 cut-off events. [2023-11-17 16:43:18,546 INFO L125 PetriNetUnfolderBase]: For 4495/4495 co-relation queries the response was YES. [2023-11-17 16:43:18,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3941 conditions, 689 events. 346/689 cut-off events. For 4495/4495 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3519 event pairs, 58 based on Foata normal form. 8/696 useless extension candidates. Maximal degree in co-relation 3877. Up to 241 conditions per place. [2023-11-17 16:43:18,551 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 116 selfloop transitions, 79 changer transitions 0/195 dead transitions. [2023-11-17 16:43:18,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 195 transitions, 2289 flow [2023-11-17 16:43:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:43:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:43:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3737 transitions. [2023-11-17 16:43:18,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37448642148511874 [2023-11-17 16:43:18,554 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3737 transitions. [2023-11-17 16:43:18,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3737 transitions. [2023-11-17 16:43:18,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:18,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3737 transitions. [2023-11-17 16:43:18,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 219.8235294117647) internal successors, (3737), 17 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:18,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 587.0) internal successors, (10566), 18 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:18,563 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 587.0) internal successors, (10566), 18 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:18,563 INFO L175 Difference]: Start difference. First operand has 128 places, 143 transitions, 1763 flow. Second operand 17 states and 3737 transitions. [2023-11-17 16:43:18,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 195 transitions, 2289 flow [2023-11-17 16:43:18,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 195 transitions, 2084 flow, removed 96 selfloop flow, removed 3 redundant places. [2023-11-17 16:43:18,583 INFO L231 Difference]: Finished difference. Result has 142 places, 143 transitions, 1737 flow [2023-11-17 16:43:18,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1737, PETRI_PLACES=142, PETRI_TRANSITIONS=143} [2023-11-17 16:43:18,584 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-11-17 16:43:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 143 transitions, 1737 flow [2023-11-17 16:43:18,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:18,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:18,590 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 16:43:18,790 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,SelfDestructingSolverStorable14 [2023-11-17 16:43:18,791 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 16:43:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 978298604, now seen corresponding path program 6 times [2023-11-17 16:43:18,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:18,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593593064] [2023-11-17 16:43:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:18,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:18,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:18,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593593064] [2023-11-17 16:43:18,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593593064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:18,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337444761] [2023-11-17 16:43:18,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:43:18,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:18,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:18,949 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 16:43:18,951 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 16:43:19,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:43:19,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:19,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:43:19,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:19,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:19,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337444761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:19,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:19,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:43:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728614078] [2023-11-17 16:43:19,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:43:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:43:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:43:19,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:43:19,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 143 transitions, 1737 flow. Second operand has 12 states, 12 states have (on average 215.25) internal successors, (2583), 12 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:19,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:19,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:43:19,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:20,551 INFO L124 PetriNetUnfolderBase]: 495/964 cut-off events. [2023-11-17 16:43:20,552 INFO L125 PetriNetUnfolderBase]: For 6207/6207 co-relation queries the response was YES. [2023-11-17 16:43:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5301 conditions, 964 events. 495/964 cut-off events. For 6207/6207 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5287 event pairs, 79 based on Foata normal form. 32/995 useless extension candidates. Maximal degree in co-relation 5235. Up to 528 conditions per place. [2023-11-17 16:43:20,558 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 153 selfloop transitions, 111 changer transitions 0/264 dead transitions. [2023-11-17 16:43:20,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 264 transitions, 3224 flow [2023-11-17 16:43:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:43:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:43:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4166 transitions. [2023-11-17 16:43:20,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735317851699094 [2023-11-17 16:43:20,562 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4166 transitions. [2023-11-17 16:43:20,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4166 transitions. [2023-11-17 16:43:20,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:20,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4166 transitions. [2023-11-17 16:43:20,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 219.26315789473685) internal successors, (4166), 19 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:20,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 587.0) internal successors, (11740), 20 states have internal predecessors, (11740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:20,571 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 587.0) internal successors, (11740), 20 states have internal predecessors, (11740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:20,571 INFO L175 Difference]: Start difference. First operand has 142 places, 143 transitions, 1737 flow. Second operand 19 states and 4166 transitions. [2023-11-17 16:43:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 264 transitions, 3224 flow [2023-11-17 16:43:20,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 264 transitions, 3044 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-11-17 16:43:20,593 INFO L231 Difference]: Finished difference. Result has 156 places, 209 transitions, 2756 flow [2023-11-17 16:43:20,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2756, PETRI_PLACES=156, PETRI_TRANSITIONS=209} [2023-11-17 16:43:20,594 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2023-11-17 16:43:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 209 transitions, 2756 flow [2023-11-17 16:43:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.25) internal successors, (2583), 12 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:20,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:43:20,799 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 16:43:20,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 820013877, now seen corresponding path program 4 times [2023-11-17 16:43:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:20,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255260569] [2023-11-17 16:43:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255260569] [2023-11-17 16:43:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255260569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417327578] [2023-11-17 16:43:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:43:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:20,913 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 16:43:20,929 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 16:43:21,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:43:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:21,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:43:21,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:21,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417327578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:21,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:43:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937062316] [2023-11-17 16:43:21,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:43:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:43:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:43:21,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:43:21,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 209 transitions, 2756 flow. Second operand has 13 states, 13 states have (on average 215.07692307692307) internal successors, (2796), 13 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:21,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:21,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:43:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:24,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:43:24,460 INFO L124 PetriNetUnfolderBase]: 637/1244 cut-off events. [2023-11-17 16:43:24,460 INFO L125 PetriNetUnfolderBase]: For 8129/8129 co-relation queries the response was YES. [2023-11-17 16:43:24,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 1244 events. 637/1244 cut-off events. For 8129/8129 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7239 event pairs, 28 based on Foata normal form. 8/1251 useless extension candidates. Maximal degree in co-relation 7257. Up to 393 conditions per place. [2023-11-17 16:43:24,469 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 181 selfloop transitions, 141 changer transitions 0/322 dead transitions. [2023-11-17 16:43:24,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 322 transitions, 4469 flow [2023-11-17 16:43:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:43:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:43:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3734 transitions. [2023-11-17 16:43:24,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741857901593346 [2023-11-17 16:43:24,472 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3734 transitions. [2023-11-17 16:43:24,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3734 transitions. [2023-11-17 16:43:24,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:24,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3734 transitions. [2023-11-17 16:43:24,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 219.64705882352942) internal successors, (3734), 17 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:24,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 587.0) internal successors, (10566), 18 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:24,480 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 587.0) internal successors, (10566), 18 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:24,480 INFO L175 Difference]: Start difference. First operand has 156 places, 209 transitions, 2756 flow. Second operand 17 states and 3734 transitions. [2023-11-17 16:43:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 322 transitions, 4469 flow [2023-11-17 16:43:24,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 322 transitions, 4138 flow, removed 137 selfloop flow, removed 6 redundant places. [2023-11-17 16:43:24,524 INFO L231 Difference]: Finished difference. Result has 171 places, 251 transitions, 3415 flow [2023-11-17 16:43:24,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3415, PETRI_PLACES=171, PETRI_TRANSITIONS=251} [2023-11-17 16:43:24,524 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-11-17 16:43:24,524 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 251 transitions, 3415 flow [2023-11-17 16:43:24,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.07692307692307) internal successors, (2796), 13 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:24,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:24,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:24,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:24,730 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,SelfDestructingSolverStorable16 [2023-11-17 16:43:24,730 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 16:43:24,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1546581098, now seen corresponding path program 7 times [2023-11-17 16:43:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480716932] [2023-11-17 16:43:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:24,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480716932] [2023-11-17 16:43:24,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480716932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962194753] [2023-11-17 16:43:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:43:24,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:24,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:24,839 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 16:43:24,856 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 16:43:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:25,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:43:25,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:25,079 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 16:43:25,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:43:25,138 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 16:43:25,543 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-11-17 16:43:25,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 48 [2023-11-17 16:43:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:43:25,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:56,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962194753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:56,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:56,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 20 [2023-11-17 16:43:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011362054] [2023-11-17 16:43:56,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:56,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:43:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:43:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:43:56,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 587 [2023-11-17 16:43:56,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 251 transitions, 3415 flow. Second operand has 20 states, 20 states have (on average 146.9) internal successors, (2938), 20 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:56,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:56,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 587 [2023-11-17 16:43:56,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:02,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:44:03,411 INFO L124 PetriNetUnfolderBase]: 766/1503 cut-off events. [2023-11-17 16:44:03,411 INFO L125 PetriNetUnfolderBase]: For 9337/9337 co-relation queries the response was YES. [2023-11-17 16:44:03,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9113 conditions, 1503 events. 766/1503 cut-off events. For 9337/9337 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9055 event pairs, 10 based on Foata normal form. 7/1508 useless extension candidates. Maximal degree in co-relation 8971. Up to 743 conditions per place. [2023-11-17 16:44:03,423 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 185 selfloop transitions, 221 changer transitions 5/411 dead transitions. [2023-11-17 16:44:03,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 411 transitions, 5634 flow [2023-11-17 16:44:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:44:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:44:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4816 transitions. [2023-11-17 16:44:03,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2563884156729131 [2023-11-17 16:44:03,427 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4816 transitions. [2023-11-17 16:44:03,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4816 transitions. [2023-11-17 16:44:03,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:03,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4816 transitions. [2023-11-17 16:44:03,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 150.5) internal successors, (4816), 32 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:03,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 587.0) internal successors, (19371), 33 states have internal predecessors, (19371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:03,441 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 587.0) internal successors, (19371), 33 states have internal predecessors, (19371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:03,441 INFO L175 Difference]: Start difference. First operand has 171 places, 251 transitions, 3415 flow. Second operand 32 states and 4816 transitions. [2023-11-17 16:44:03,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 411 transitions, 5634 flow [2023-11-17 16:44:03,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 411 transitions, 5280 flow, removed 160 selfloop flow, removed 3 redundant places. [2023-11-17 16:44:03,496 INFO L231 Difference]: Finished difference. Result has 207 places, 334 transitions, 4998 flow [2023-11-17 16:44:03,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4998, PETRI_PLACES=207, PETRI_TRANSITIONS=334} [2023-11-17 16:44:03,496 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-11-17 16:44:03,496 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 334 transitions, 4998 flow [2023-11-17 16:44:03,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 146.9) internal successors, (2938), 20 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:03,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:03,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:44:03,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:44:03,702 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,SelfDestructingSolverStorable17 [2023-11-17 16:44:03,703 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 16:44:03,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1028258554, now seen corresponding path program 8 times [2023-11-17 16:44:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176308497] [2023-11-17 16:44:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176308497] [2023-11-17 16:44:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176308497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262300781] [2023-11-17 16:44:03,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:44:03,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:03,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:03,808 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 16:44:03,815 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 16:44:03,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:44:03,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:03,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:44:03,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:04,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262300781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:04,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:04,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:44:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976953777] [2023-11-17 16:44:04,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:04,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:44:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:44:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:44:04,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:44:04,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 334 transitions, 4998 flow. Second operand has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:04,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:04,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:44:04,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:05,087 INFO L124 PetriNetUnfolderBase]: 757/1451 cut-off events. [2023-11-17 16:44:05,087 INFO L125 PetriNetUnfolderBase]: For 11796/11796 co-relation queries the response was YES. [2023-11-17 16:44:05,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9474 conditions, 1451 events. 757/1451 cut-off events. For 11796/11796 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8440 event pairs, 148 based on Foata normal form. 12/1461 useless extension candidates. Maximal degree in co-relation 9312. Up to 888 conditions per place. [2023-11-17 16:44:05,097 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 226 selfloop transitions, 144 changer transitions 0/370 dead transitions. [2023-11-17 16:44:05,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 370 transitions, 5766 flow [2023-11-17 16:44:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:44:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:44:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3512 transitions. [2023-11-17 16:44:05,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739352640545145 [2023-11-17 16:44:05,101 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3512 transitions. [2023-11-17 16:44:05,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3512 transitions. [2023-11-17 16:44:05,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:05,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3512 transitions. [2023-11-17 16:44:05,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 219.5) internal successors, (3512), 16 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:05,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 587.0) internal successors, (9979), 17 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:05,108 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 587.0) internal successors, (9979), 17 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:05,108 INFO L175 Difference]: Start difference. First operand has 207 places, 334 transitions, 4998 flow. Second operand 16 states and 3512 transitions. [2023-11-17 16:44:05,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 370 transitions, 5766 flow [2023-11-17 16:44:05,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 370 transitions, 5553 flow, removed 57 selfloop flow, removed 9 redundant places. [2023-11-17 16:44:05,177 INFO L231 Difference]: Finished difference. Result has 213 places, 329 transitions, 5014 flow [2023-11-17 16:44:05,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5014, PETRI_PLACES=213, PETRI_TRANSITIONS=329} [2023-11-17 16:44:05,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2023-11-17 16:44:05,177 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 329 transitions, 5014 flow [2023-11-17 16:44:05,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:05,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:05,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:44:05,183 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 16:44:05,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:05,383 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 16:44:05,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1349130247, now seen corresponding path program 5 times [2023-11-17 16:44:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:05,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094892726] [2023-11-17 16:44:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:05,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094892726] [2023-11-17 16:44:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094892726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625409407] [2023-11-17 16:44:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:44:05,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:05,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:05,494 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 16:44:05,495 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 16:44:06,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:44:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:06,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:44:06,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:06,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:06,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625409407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:06,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:06,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:44:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439224568] [2023-11-17 16:44:06,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:06,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:44:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:44:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:44:06,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:44:06,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 329 transitions, 5014 flow. Second operand has 12 states, 12 states have (on average 215.33333333333334) internal successors, (2584), 12 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:06,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:06,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:44:06,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:09,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:44:10,323 INFO L124 PetriNetUnfolderBase]: 759/1459 cut-off events. [2023-11-17 16:44:10,324 INFO L125 PetriNetUnfolderBase]: For 12021/12021 co-relation queries the response was YES. [2023-11-17 16:44:10,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9680 conditions, 1459 events. 759/1459 cut-off events. For 12021/12021 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8568 event pairs, 85 based on Foata normal form. 20/1478 useless extension candidates. Maximal degree in co-relation 9537. Up to 539 conditions per place. [2023-11-17 16:44:10,332 INFO L140 encePairwiseOnDemand]: 581/587 looper letters, 200 selfloop transitions, 176 changer transitions 0/376 dead transitions. [2023-11-17 16:44:10,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 376 transitions, 5958 flow [2023-11-17 16:44:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:44:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:44:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3503 transitions. [2023-11-17 16:44:10,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729770017035775 [2023-11-17 16:44:10,335 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3503 transitions. [2023-11-17 16:44:10,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3503 transitions. [2023-11-17 16:44:10,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:10,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3503 transitions. [2023-11-17 16:44:10,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 218.9375) internal successors, (3503), 16 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:10,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 587.0) internal successors, (9979), 17 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:10,342 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 587.0) internal successors, (9979), 17 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:10,342 INFO L175 Difference]: Start difference. First operand has 213 places, 329 transitions, 5014 flow. Second operand 16 states and 3503 transitions. [2023-11-17 16:44:10,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 376 transitions, 5958 flow [2023-11-17 16:44:10,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 376 transitions, 5786 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-17 16:44:10,410 INFO L231 Difference]: Finished difference. Result has 220 places, 331 transitions, 5211 flow [2023-11-17 16:44:10,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5211, PETRI_PLACES=220, PETRI_TRANSITIONS=331} [2023-11-17 16:44:10,411 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2023-11-17 16:44:10,411 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 331 transitions, 5211 flow [2023-11-17 16:44:10,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.33333333333334) internal successors, (2584), 12 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:10,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:10,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:44:10,416 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 16:44:10,616 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,SelfDestructingSolverStorable19 [2023-11-17 16:44:10,616 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 16:44:10,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 437041095, now seen corresponding path program 6 times [2023-11-17 16:44:10,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:10,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321434879] [2023-11-17 16:44:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:10,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:10,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321434879] [2023-11-17 16:44:10,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321434879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:10,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364646736] [2023-11-17 16:44:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:44:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:10,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:10,773 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 16:44:10,776 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 16:44:10,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:44:10,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:10,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:44:10,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:11,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364646736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:11,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:11,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:44:11,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005955314] [2023-11-17 16:44:11,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:11,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:44:11,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:44:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:44:11,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:44:11,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 331 transitions, 5211 flow. Second operand has 13 states, 13 states have (on average 214.92307692307693) internal successors, (2794), 13 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:11,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:11,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:44:11,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:11,976 INFO L124 PetriNetUnfolderBase]: 859/1659 cut-off events. [2023-11-17 16:44:11,977 INFO L125 PetriNetUnfolderBase]: For 15441/15441 co-relation queries the response was YES. [2023-11-17 16:44:11,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11237 conditions, 1659 events. 859/1659 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9972 event pairs, 49 based on Foata normal form. 4/1662 useless extension candidates. Maximal degree in co-relation 11071. Up to 447 conditions per place. [2023-11-17 16:44:11,986 INFO L140 encePairwiseOnDemand]: 580/587 looper letters, 218 selfloop transitions, 220 changer transitions 0/438 dead transitions. [2023-11-17 16:44:11,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 438 transitions, 7181 flow [2023-11-17 16:44:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:44:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:44:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3304 transitions. [2023-11-17 16:44:12,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752413401476434 [2023-11-17 16:44:12,000 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3304 transitions. [2023-11-17 16:44:12,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3304 transitions. [2023-11-17 16:44:12,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:12,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3304 transitions. [2023-11-17 16:44:12,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 220.26666666666668) internal successors, (3304), 15 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:12,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 587.0) internal successors, (9392), 16 states have internal predecessors, (9392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:12,016 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 587.0) internal successors, (9392), 16 states have internal predecessors, (9392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:12,016 INFO L175 Difference]: Start difference. First operand has 220 places, 331 transitions, 5211 flow. Second operand 15 states and 3304 transitions. [2023-11-17 16:44:12,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 438 transitions, 7181 flow [2023-11-17 16:44:12,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 438 transitions, 6890 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-17 16:44:12,095 INFO L231 Difference]: Finished difference. Result has 232 places, 364 transitions, 6038 flow [2023-11-17 16:44:12,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=4947, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6038, PETRI_PLACES=232, PETRI_TRANSITIONS=364} [2023-11-17 16:44:12,096 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-11-17 16:44:12,096 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 364 transitions, 6038 flow [2023-11-17 16:44:12,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.92307692307693) internal successors, (2794), 13 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:12,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:12,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:44:12,117 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 16:44:12,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:12,302 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 16:44:12,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 867318061, now seen corresponding path program 7 times [2023-11-17 16:44:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21763547] [2023-11-17 16:44:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21763547] [2023-11-17 16:44:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21763547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028184775] [2023-11-17 16:44:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:44:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:12,481 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 16:44:12,481 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 16:44:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:13,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:44:13,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:13,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:13,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028184775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:13,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:13,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:44:13,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582390594] [2023-11-17 16:44:13,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:13,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:44:13,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:13,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:44:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:44:13,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 587 [2023-11-17 16:44:13,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 364 transitions, 6038 flow. Second operand has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:13,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:13,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 587 [2023-11-17 16:44:13,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:14,244 INFO L124 PetriNetUnfolderBase]: 849/1637 cut-off events. [2023-11-17 16:44:14,245 INFO L125 PetriNetUnfolderBase]: For 16634/16634 co-relation queries the response was YES. [2023-11-17 16:44:14,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11780 conditions, 1637 events. 849/1637 cut-off events. For 16634/16634 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9819 event pairs, 59 based on Foata normal form. 12/1648 useless extension candidates. Maximal degree in co-relation 11604. Up to 447 conditions per place. [2023-11-17 16:44:14,257 INFO L140 encePairwiseOnDemand]: 580/587 looper letters, 209 selfloop transitions, 220 changer transitions 0/429 dead transitions. [2023-11-17 16:44:14,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 429 transitions, 7452 flow [2023-11-17 16:44:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:44:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:44:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3727 transitions. [2023-11-17 16:44:14,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37348431706583823 [2023-11-17 16:44:14,279 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3727 transitions. [2023-11-17 16:44:14,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3727 transitions. [2023-11-17 16:44:14,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:14,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3727 transitions. [2023-11-17 16:44:14,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 219.23529411764707) internal successors, (3727), 17 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:14,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 587.0) internal successors, (10566), 18 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:14,317 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 587.0) internal successors, (10566), 18 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:14,317 INFO L175 Difference]: Start difference. First operand has 232 places, 364 transitions, 6038 flow. Second operand 17 states and 3727 transitions. [2023-11-17 16:44:14,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 429 transitions, 7452 flow [2023-11-17 16:44:14,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 429 transitions, 7337 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-11-17 16:44:14,400 INFO L231 Difference]: Finished difference. Result has 247 places, 364 transitions, 6403 flow [2023-11-17 16:44:14,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6403, PETRI_PLACES=247, PETRI_TRANSITIONS=364} [2023-11-17 16:44:14,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2023-11-17 16:44:14,400 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 364 transitions, 6403 flow [2023-11-17 16:44:14,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:14,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:14,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:44:14,408 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 16:44:14,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:14,606 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 16:44:14,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2064678339, now seen corresponding path program 9 times [2023-11-17 16:44:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127409119] [2023-11-17 16:44:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:14,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:14,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127409119] [2023-11-17 16:44:14,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127409119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:14,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270306565] [2023-11-17 16:44:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:44:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:14,759 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 16:44:14,777 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 16:44:14,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:44:14,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:14,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 16:44:14,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:15,028 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 16:44:15,059 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 16:44:15,101 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 16:44:15,323 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 16:44:15,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270306565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:31,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-11-17 16:44:31,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219605428] [2023-11-17 16:44:31,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:31,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:44:31,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:44:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=442, Unknown=1, NotChecked=0, Total=552 [2023-11-17 16:44:31,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 587 [2023-11-17 16:44:31,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 364 transitions, 6403 flow. Second operand has 24 states, 24 states have (on average 146.91666666666666) internal successors, (3526), 24 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:31,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:31,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 587 [2023-11-17 16:44:31,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:36,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:44:41,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:44:46,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:44:53,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:45:06,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:45:09,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:45:09,902 INFO L124 PetriNetUnfolderBase]: 1384/2629 cut-off events. [2023-11-17 16:45:09,902 INFO L125 PetriNetUnfolderBase]: For 29196/29196 co-relation queries the response was YES. [2023-11-17 16:45:09,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19768 conditions, 2629 events. 1384/2629 cut-off events. For 29196/29196 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17109 event pairs, 51 based on Foata normal form. 16/2644 useless extension candidates. Maximal degree in co-relation 19584. Up to 565 conditions per place. [2023-11-17 16:45:09,941 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 326 selfloop transitions, 378 changer transitions 21/725 dead transitions. [2023-11-17 16:45:09,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 725 transitions, 11951 flow [2023-11-17 16:45:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:45:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:45:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 7132 transitions. [2023-11-17 16:45:09,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2585088259813694 [2023-11-17 16:45:09,949 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 7132 transitions. [2023-11-17 16:45:09,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 7132 transitions. [2023-11-17 16:45:09,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:45:09,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 7132 transitions. [2023-11-17 16:45:09,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 151.74468085106383) internal successors, (7132), 47 states have internal predecessors, (7132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:09,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 587.0) internal successors, (28176), 48 states have internal predecessors, (28176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:09,981 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 587.0) internal successors, (28176), 48 states have internal predecessors, (28176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:09,981 INFO L175 Difference]: Start difference. First operand has 247 places, 364 transitions, 6403 flow. Second operand 47 states and 7132 transitions. [2023-11-17 16:45:09,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 725 transitions, 11951 flow [2023-11-17 16:45:10,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 725 transitions, 11506 flow, removed 11 selfloop flow, removed 8 redundant places. [2023-11-17 16:45:10,161 INFO L231 Difference]: Finished difference. Result has 302 places, 539 transitions, 10053 flow [2023-11-17 16:45:10,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=6139, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=10053, PETRI_PLACES=302, PETRI_TRANSITIONS=539} [2023-11-17 16:45:10,162 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2023-11-17 16:45:10,162 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 539 transitions, 10053 flow [2023-11-17 16:45:10,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 146.91666666666666) internal successors, (3526), 24 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:10,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:45:10,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:45:10,168 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 16:45:10,368 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,SelfDestructingSolverStorable22 [2023-11-17 16:45:10,368 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 16:45:10,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:45:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1244170459, now seen corresponding path program 10 times [2023-11-17 16:45:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:45:10,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410185725] [2023-11-17 16:45:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:45:10,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:45:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:45:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:10,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:45:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410185725] [2023-11-17 16:45:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410185725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:45:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090089140] [2023-11-17 16:45:10,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:45:10,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:10,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:45:10,631 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 16:45:10,715 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 16:45:10,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:45:10,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:45:10,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 16:45:10,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:45:10,936 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 16:45:10,991 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 16:45:11,017 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 16:45:11,399 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-11-17 16:45:11,399 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 48 [2023-11-17 16:45:11,426 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 16:45:11,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:45:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090089140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:45:23,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:45:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-11-17 16:45:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707703981] [2023-11-17 16:45:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:45:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:45:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:45:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:45:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:45:23,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 587 [2023-11-17 16:45:23,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 539 transitions, 10053 flow. Second operand has 23 states, 23 states have (on average 146.7826086956522) internal successors, (3376), 23 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:23,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:45:23,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 587 [2023-11-17 16:45:23,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:45:37,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:45:39,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:45:42,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:45:45,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:45:46,919 INFO L124 PetriNetUnfolderBase]: 1491/2843 cut-off events. [2023-11-17 16:45:46,920 INFO L125 PetriNetUnfolderBase]: For 36584/36584 co-relation queries the response was YES. [2023-11-17 16:45:46,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22838 conditions, 2843 events. 1491/2843 cut-off events. For 36584/36584 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18898 event pairs, 46 based on Foata normal form. 8/2850 useless extension candidates. Maximal degree in co-relation 22633. Up to 607 conditions per place. [2023-11-17 16:45:46,938 INFO L140 encePairwiseOnDemand]: 575/587 looper letters, 282 selfloop transitions, 439 changer transitions 13/734 dead transitions. [2023-11-17 16:45:46,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 734 transitions, 13284 flow [2023-11-17 16:45:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 16:45:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 16:45:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7395 transitions. [2023-11-17 16:45:46,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2571011368772381 [2023-11-17 16:45:46,944 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7395 transitions. [2023-11-17 16:45:46,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7395 transitions. [2023-11-17 16:45:46,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:45:46,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7395 transitions. [2023-11-17 16:45:46,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 150.91836734693877) internal successors, (7395), 49 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:46,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 587.0) internal successors, (29350), 50 states have internal predecessors, (29350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:46,964 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 587.0) internal successors, (29350), 50 states have internal predecessors, (29350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:46,964 INFO L175 Difference]: Start difference. First operand has 302 places, 539 transitions, 10053 flow. Second operand 49 states and 7395 transitions. [2023-11-17 16:45:46,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 734 transitions, 13284 flow [2023-11-17 16:45:47,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 734 transitions, 12447 flow, removed 311 selfloop flow, removed 13 redundant places. [2023-11-17 16:45:47,185 INFO L231 Difference]: Finished difference. Result has 345 places, 605 transitions, 11799 flow [2023-11-17 16:45:47,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=9427, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=11799, PETRI_PLACES=345, PETRI_TRANSITIONS=605} [2023-11-17 16:45:47,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 324 predicate places. [2023-11-17 16:45:47,185 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 605 transitions, 11799 flow [2023-11-17 16:45:47,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 146.7826086956522) internal successors, (3376), 23 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:47,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:45:47,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:45:47,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 16:45:47,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:47,391 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 16:45:47,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:45:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1330669193, now seen corresponding path program 11 times [2023-11-17 16:45:47,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:45:47,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219674120] [2023-11-17 16:45:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:45:47,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:45:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:45:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:45:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219674120] [2023-11-17 16:45:47,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219674120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:45:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116072726] [2023-11-17 16:45:47,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:45:47,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:45:47,574 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 16:45:47,576 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 16:45:47,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:45:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:45:47,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 16:45:47,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:45:47,799 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 16:45:47,832 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 16:45:47,857 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 16:45:48,349 INFO L349 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-11-17 16:45:48,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 289 treesize of output 284 [2023-11-17 16:45:48,541 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 16:45:48,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:46:10,638 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:46:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:46:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116072726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:46:20,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:46:20,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-11-17 16:46:20,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981982609] [2023-11-17 16:46:20,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:46:20,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:46:20,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:46:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:46:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:46:20,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 587 [2023-11-17 16:46:20,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 605 transitions, 11799 flow. Second operand has 23 states, 23 states have (on average 146.7826086956522) internal successors, (3376), 23 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:20,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:46:20,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 587 [2023-11-17 16:46:20,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:46:29,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:46:37,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:46:40,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:46:54,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:46:56,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:11,027 WARN L293 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:47:19,799 WARN L293 SmtUtils]: Spent 7.50s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:47:27,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:33,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:36,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:38,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:40,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:42,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:44,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:47,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:52,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:47:54,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:48:04,383 WARN L293 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 139 DAG size of output: 124 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:48:04,471 INFO L124 PetriNetUnfolderBase]: 1630/3098 cut-off events. [2023-11-17 16:48:04,471 INFO L125 PetriNetUnfolderBase]: For 46259/46259 co-relation queries the response was YES. [2023-11-17 16:48:04,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25989 conditions, 3098 events. 1630/3098 cut-off events. For 46259/46259 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 20941 event pairs, 51 based on Foata normal form. 8/3105 useless extension candidates. Maximal degree in co-relation 25806. Up to 665 conditions per place. [2023-11-17 16:48:04,498 INFO L140 encePairwiseOnDemand]: 575/587 looper letters, 329 selfloop transitions, 474 changer transitions 11/814 dead transitions. [2023-11-17 16:48:04,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 814 transitions, 15292 flow [2023-11-17 16:48:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 16:48:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 16:48:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7420 transitions. [2023-11-17 16:48:04,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25797030907763446 [2023-11-17 16:48:04,504 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7420 transitions. [2023-11-17 16:48:04,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7420 transitions. [2023-11-17 16:48:04,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:48:04,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7420 transitions. [2023-11-17 16:48:04,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 151.42857142857142) internal successors, (7420), 49 states have internal predecessors, (7420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:48:04,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 587.0) internal successors, (29350), 50 states have internal predecessors, (29350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:48:04,520 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 587.0) internal successors, (29350), 50 states have internal predecessors, (29350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:48:04,520 INFO L175 Difference]: Start difference. First operand has 345 places, 605 transitions, 11799 flow. Second operand 49 states and 7420 transitions. [2023-11-17 16:48:04,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 814 transitions, 15292 flow [2023-11-17 16:48:04,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 814 transitions, 14780 flow, removed 134 selfloop flow, removed 21 redundant places. [2023-11-17 16:48:04,802 INFO L231 Difference]: Finished difference. Result has 380 places, 672 transitions, 13836 flow [2023-11-17 16:48:04,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=11363, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=13836, PETRI_PLACES=380, PETRI_TRANSITIONS=672} [2023-11-17 16:48:04,802 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 359 predicate places. [2023-11-17 16:48:04,802 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 672 transitions, 13836 flow [2023-11-17 16:48:04,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 146.7826086956522) internal successors, (3376), 23 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:48:04,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:48:04,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:48:04,809 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 16:48:05,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:48:05,009 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 16:48:05,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:48:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1651540886, now seen corresponding path program 1 times [2023-11-17 16:48:05,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:48:05,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744406710] [2023-11-17 16:48:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:48:05,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:48:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-11-17 16:48:05,165 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:48:05,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-17 16:48:05,165 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. [2023-11-17 16:48:05,166 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:48:05,166 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:48:05,166 INFO L445 BasicCegarLoop]: Path program histogram: [11, 7, 6, 1, 1] [2023-11-17 16:48:05,168 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:48:05,168 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:48:05,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:48:05 BasicIcfg [2023-11-17 16:48:05,170 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:48:05,170 INFO L158 Benchmark]: Toolchain (without parser) took 562824.87ms. Allocated memory was 209.7MB in the beginning and 1.0GB in the end (delta: 820.0MB). Free memory was 171.5MB in the beginning and 563.8MB in the end (delta: -392.3MB). Peak memory consumption was 430.3MB. Max. memory is 8.0GB. [2023-11-17 16:48:05,173 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 209.7MB. Free memory is still 168.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:48:05,174 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.87ms. Allocated memory is still 209.7MB. Free memory was 171.0MB in the beginning and 159.0MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:48:05,174 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.79ms. Allocated memory is still 209.7MB. Free memory was 159.0MB in the beginning and 156.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:48:05,174 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 209.7MB. Free memory was 156.8MB in the beginning and 154.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:48:05,175 INFO L158 Benchmark]: RCFGBuilder took 421.50ms. Allocated memory is still 209.7MB. Free memory was 154.8MB in the beginning and 133.3MB in the end (delta: 21.6MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 16:48:05,175 INFO L158 Benchmark]: TraceAbstraction took 562155.37ms. Allocated memory was 209.7MB in the beginning and 1.0GB in the end (delta: 820.0MB). Free memory was 132.8MB in the beginning and 563.8MB in the end (delta: -431.0MB). Peak memory consumption was 391.5MB. Max. memory is 8.0GB. [2023-11-17 16:48:05,176 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 209.7MB. Free memory is still 168.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 179.87ms. Allocated memory is still 209.7MB. Free memory was 171.0MB in the beginning and 159.0MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.79ms. Allocated memory is still 209.7MB. Free memory was 159.0MB in the beginning and 156.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.26ms. Allocated memory is still 209.7MB. Free memory was 156.8MB in the beginning and 154.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 421.50ms. Allocated memory is still 209.7MB. Free memory was 154.8MB in the beginning and 133.3MB in the end (delta: 21.6MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 562155.37ms. Allocated memory was 209.7MB in the beginning and 1.0GB in the end (delta: 820.0MB). Free memory was 132.8MB in the beginning and 563.8MB in the end (delta: -431.0MB). Peak memory consumption was 391.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 20.7s, 243 PlacesBefore, 21 PlacesAfterwards, 260 TransitionsBefore, 17 TransitionsAfterwards, 7992 CoEnabledTransitionPairs, 8 FixpointIterations, 76 TrivialSequentialCompositions, 150 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 52 ConcurrentYvCompositions, 21 ChoiceCompositions, 316 TotalNumberOfCompositions, 7284 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7167, independent: 7156, independent conditional: 0, independent unconditional: 7156, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5800, independent: 5792, independent conditional: 0, independent unconditional: 5792, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5800, independent: 5792, independent conditional: 0, independent unconditional: 5792, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7167, independent: 1364, independent conditional: 0, independent unconditional: 1364, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 5800, unknown conditional: 0, unknown unconditional: 5800] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 396 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: 562.0s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 286.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 20.8s, HoareTripleCheckerStatistics: 46 mSolverCounterUnknown, 2393 SdHoareTripleChecker+Valid, 132.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2393 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 130.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 539 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11071 IncrementalHoareTripleChecker+Invalid, 11656 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 539 mSolverCounterUnsat, 0 mSDtfsCounter, 11071 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1191 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 171.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13836occurred in iteration=25, InterpolantAutomatonStates: 488, 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: 0.2s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 245.3s InterpolantComputationTime, 714 NumberOfCodeBlocks, 714 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 958 ConstructedInterpolants, 10 QuantifiedInterpolants, 19374 SizeOfPredicates, 391 NumberOfNonLiveVariables, 3013 ConjunctsInSsa, 440 ConjunctsInUnsatCore, 61 InterpolantComputations, 7 PerfectInterpolantSequences, 116/216 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