/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/popl20-bad-commit-2.wvr-bad.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:08:15,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:08:15,845 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 16:08:15,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:08:15,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:08:15,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:08:15,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:08:15,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:08:15,863 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:08:15,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:08:15,864 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:08:15,864 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:08:15,864 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:08:15,865 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:08:15,865 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:08:15,865 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:08:15,865 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:08:15,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:08:15,866 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:08:15,866 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:08:15,866 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:08:15,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:08:15,867 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:08:15,867 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:08:15,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:08:15,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:15,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:08:15,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:08:15,868 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:08:15,868 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:08:15,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:08:15,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:08:15,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:08:16,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:08:16,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:08:16,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:08:16,069 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:08:16,069 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:08:16,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-11-17 16:08:17,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:08:17,277 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:08:17,281 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c [2023-11-17 16:08:17,291 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cf06d5ea/34dcf44ab06546f2a6b2b1788c86f8b9/FLAGd7ab95965 [2023-11-17 16:08:17,687 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cf06d5ea/34dcf44ab06546f2a6b2b1788c86f8b9 [2023-11-17 16:08:17,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:08:17,693 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:08:17,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:17,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:08:17,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:08:17,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502ae6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17, skipping insertion in model container [2023-11-17 16:08:17,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,724 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:08:17,863 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-11-17 16:08:17,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:17,880 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:08:17,907 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-2.wvr-bad.c[6687,6700] [2023-11-17 16:08:17,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:17,915 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:17,915 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:17,924 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:08:17,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17 WrapperNode [2023-11-17 16:08:17,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:17,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:17,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:08:17,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:08:17,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,939 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,981 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 481 [2023-11-17 16:08:17,981 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:17,982 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:08:17,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:08:17,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:08:17,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,992 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:18,001 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:18,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:18,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:18,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:18,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:08:18,018 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:08:18,018 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:08:18,018 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:08:18,019 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:18,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:18,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:18,062 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 16:08:18,079 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 16:08:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:08:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:08:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:08:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:08:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:08:18,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:08:18,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:08:18,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:08:18,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:08:18,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:08:18,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:08:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:08:18,110 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 16:08:18,207 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:08:18,209 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:08:18,670 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:08:18,856 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:08:18,856 INFO L307 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-17 16:08:18,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:18 BoogieIcfgContainer [2023-11-17 16:08:18,858 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:08:18,860 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:08:18,860 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:08:18,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:08:18,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:08:17" (1/3) ... [2023-11-17 16:08:18,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a18320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:18, skipping insertion in model container [2023-11-17 16:08:18,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (2/3) ... [2023-11-17 16:08:18,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a18320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:18, skipping insertion in model container [2023-11-17 16:08:18,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:18" (3/3) ... [2023-11-17 16:08:18,864 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2023-11-17 16:08:18,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:08:18,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:08:18,878 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:08:18,954 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:08:18,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 374 transitions, 776 flow [2023-11-17 16:08:19,114 INFO L124 PetriNetUnfolderBase]: 37/370 cut-off events. [2023-11-17 16:08:19,114 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:08:19,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 370 events. 37/370 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-11-17 16:08:19,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 350 places, 374 transitions, 776 flow [2023-11-17 16:08:19,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 357 transitions, 738 flow [2023-11-17 16:08:19,134 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:08:19,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 357 transitions, 738 flow [2023-11-17 16:08:19,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 357 transitions, 738 flow [2023-11-17 16:08:19,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 357 transitions, 738 flow [2023-11-17 16:08:19,212 INFO L124 PetriNetUnfolderBase]: 37/357 cut-off events. [2023-11-17 16:08:19,213 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:08:19,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 357 events. 37/357 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 255 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 325. Up to 8 conditions per place. [2023-11-17 16:08:19,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-11-17 16:08:30,063 INFO L134 LiptonReduction]: Checked pairs total: 5636 [2023-11-17 16:08:30,063 INFO L136 LiptonReduction]: Total number of compositions: 392 [2023-11-17 16:08:30,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:08:30,085 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;@180c821b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:08:30,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:08:30,093 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:08:30,093 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2023-11-17 16:08:30,093 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:08:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:30,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:30,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:30,099 INFO L85 PathProgramCache]: Analyzing trace with hash 256840574, now seen corresponding path program 1 times [2023-11-17 16:08:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974229474] [2023-11-17 16:08:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,491 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 16:08:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:30,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974229474] [2023-11-17 16:08:30,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974229474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:30,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:30,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:08:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332700948] [2023-11-17 16:08:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:30,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:08:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:08:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:08:30,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 766 [2023-11-17 16:08:30,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:30,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 766 [2023-11-17 16:08:30,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:30,779 INFO L124 PetriNetUnfolderBase]: 501/685 cut-off events. [2023-11-17 16:08:30,779 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-17 16:08:30,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 685 events. 501/685 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1783 event pairs, 117 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2023-11-17 16:08:30,785 INFO L140 encePairwiseOnDemand]: 760/766 looper letters, 49 selfloop transitions, 5 changer transitions 1/55 dead transitions. [2023-11-17 16:08:30,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 265 flow [2023-11-17 16:08:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:08:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:08:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1055 transitions. [2023-11-17 16:08:30,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459094865100087 [2023-11-17 16:08:30,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1055 transitions. [2023-11-17 16:08:30,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1055 transitions. [2023-11-17 16:08:30,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:30,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1055 transitions. [2023-11-17 16:08:30,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,824 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 90 flow. Second operand 3 states and 1055 transitions. [2023-11-17 16:08:30,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 265 flow [2023-11-17 16:08:30,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:08:30,830 INFO L231 Difference]: Finished difference. Result has 33 places, 37 transitions, 107 flow [2023-11-17 16:08:30,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=33, PETRI_TRANSITIONS=37} [2023-11-17 16:08:30,835 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-17 16:08:30,835 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 107 flow [2023-11-17 16:08:30,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:08:30,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:30,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1262694369, now seen corresponding path program 1 times [2023-11-17 16:08:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:30,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21127193] [2023-11-17 16:08:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:31,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:31,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21127193] [2023-11-17 16:08:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21127193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:31,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934366700] [2023-11-17 16:08:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:31,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 766 [2023-11-17 16:08:31,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 37 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 282.5) internal successors, (1130), 4 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:31,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 766 [2023-11-17 16:08:31,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:31,519 INFO L124 PetriNetUnfolderBase]: 941/1309 cut-off events. [2023-11-17 16:08:31,520 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2023-11-17 16:08:31,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3385 conditions, 1309 events. 941/1309 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3893 event pairs, 526 based on Foata normal form. 60/1361 useless extension candidates. Maximal degree in co-relation 886. Up to 686 conditions per place. [2023-11-17 16:08:31,526 INFO L140 encePairwiseOnDemand]: 762/766 looper letters, 68 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-11-17 16:08:31,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 71 transitions, 342 flow [2023-11-17 16:08:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1169 transitions. [2023-11-17 16:08:31,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815274151436031 [2023-11-17 16:08:31,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1169 transitions. [2023-11-17 16:08:31,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1169 transitions. [2023-11-17 16:08:31,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:31,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1169 transitions. [2023-11-17 16:08:31,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 292.25) internal successors, (1169), 4 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,536 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,536 INFO L175 Difference]: Start difference. First operand has 33 places, 37 transitions, 107 flow. Second operand 4 states and 1169 transitions. [2023-11-17 16:08:31,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 71 transitions, 342 flow [2023-11-17 16:08:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:31,539 INFO L231 Difference]: Finished difference. Result has 37 places, 39 transitions, 124 flow [2023-11-17 16:08:31,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2023-11-17 16:08:31,540 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-17 16:08:31,540 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 124 flow [2023-11-17 16:08:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.5) internal successors, (1130), 4 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:31,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:31,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:08:31,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:31,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1322482526, now seen corresponding path program 1 times [2023-11-17 16:08:31,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:31,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558907331] [2023-11-17 16:08:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558907331] [2023-11-17 16:08:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558907331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:08:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879570557] [2023-11-17 16:08:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:08:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:08:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:08:31,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 766 [2023-11-17 16:08:31,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:31,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 766 [2023-11-17 16:08:31,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:32,023 INFO L124 PetriNetUnfolderBase]: 873/1233 cut-off events. [2023-11-17 16:08:32,023 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-11-17 16:08:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1233 events. 873/1233 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4021 event pairs, 234 based on Foata normal form. 60/1286 useless extension candidates. Maximal degree in co-relation 1614. Up to 805 conditions per place. [2023-11-17 16:08:32,028 INFO L140 encePairwiseOnDemand]: 761/766 looper letters, 49 selfloop transitions, 4 changer transitions 1/54 dead transitions. [2023-11-17 16:08:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 54 transitions, 266 flow [2023-11-17 16:08:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:08:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:08:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2023-11-17 16:08:32,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395126196692776 [2023-11-17 16:08:32,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2023-11-17 16:08:32,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2023-11-17 16:08:32,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:32,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2023-11-17 16:08:32,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,054 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 124 flow. Second operand 3 states and 1010 transitions. [2023-11-17 16:08:32,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 54 transitions, 266 flow [2023-11-17 16:08:32,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 262 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:32,055 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 124 flow [2023-11-17 16:08:32,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-11-17 16:08:32,056 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-17 16:08:32,056 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 124 flow [2023-11-17 16:08:32,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:32,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:08:32,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:32,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1481800672, now seen corresponding path program 1 times [2023-11-17 16:08:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:32,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238975897] [2023-11-17 16:08:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:32,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:32,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238975897] [2023-11-17 16:08:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238975897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:32,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396301224] [2023-11-17 16:08:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:32,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 766 [2023-11-17 16:08:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 333.5) internal successors, (1334), 4 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 766 [2023-11-17 16:08:32,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:32,624 INFO L124 PetriNetUnfolderBase]: 1557/2213 cut-off events. [2023-11-17 16:08:32,624 INFO L125 PetriNetUnfolderBase]: For 1114/1114 co-relation queries the response was YES. [2023-11-17 16:08:32,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5425 conditions, 2213 events. 1557/2213 cut-off events. For 1114/1114 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8219 event pairs, 518 based on Foata normal form. 136/2342 useless extension candidates. Maximal degree in co-relation 2956. Up to 1001 conditions per place. [2023-11-17 16:08:32,632 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 71 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-17 16:08:32,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 372 flow [2023-11-17 16:08:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1379 transitions. [2023-11-17 16:08:32,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45006527415143605 [2023-11-17 16:08:32,634 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1379 transitions. [2023-11-17 16:08:32,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1379 transitions. [2023-11-17 16:08:32,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:32,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1379 transitions. [2023-11-17 16:08:32,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,642 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 124 flow. Second operand 4 states and 1379 transitions. [2023-11-17 16:08:32,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 372 flow [2023-11-17 16:08:32,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 74 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:32,644 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 136 flow [2023-11-17 16:08:32,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-17 16:08:32,645 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 16:08:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 136 flow [2023-11-17 16:08:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 333.5) internal successors, (1334), 4 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:32,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:08:32,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:32,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1735197488, now seen corresponding path program 1 times [2023-11-17 16:08:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:32,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086889902] [2023-11-17 16:08:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:32,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:32,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086889902] [2023-11-17 16:08:32,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086889902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:32,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:32,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923009069] [2023-11-17 16:08:32,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:32,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:32,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:32,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:32,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:32,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 766 [2023-11-17 16:08:32,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 333.5) internal successors, (1334), 4 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:32,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 766 [2023-11-17 16:08:32,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:33,062 INFO L124 PetriNetUnfolderBase]: 1119/1617 cut-off events. [2023-11-17 16:08:33,062 INFO L125 PetriNetUnfolderBase]: For 1028/1028 co-relation queries the response was YES. [2023-11-17 16:08:33,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4220 conditions, 1617 events. 1119/1617 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5554 event pairs, 378 based on Foata normal form. 100/1710 useless extension candidates. Maximal degree in co-relation 3756. Up to 633 conditions per place. [2023-11-17 16:08:33,068 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 66 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-11-17 16:08:33,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 373 flow [2023-11-17 16:08:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1374 transitions. [2023-11-17 16:08:33,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44843342036553524 [2023-11-17 16:08:33,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1374 transitions. [2023-11-17 16:08:33,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1374 transitions. [2023-11-17 16:08:33,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:33,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1374 transitions. [2023-11-17 16:08:33,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.5) internal successors, (1374), 4 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,078 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,078 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 136 flow. Second operand 4 states and 1374 transitions. [2023-11-17 16:08:33,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 373 flow [2023-11-17 16:08:33,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 364 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:33,081 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 140 flow [2023-11-17 16:08:33,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-11-17 16:08:33,082 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-17 16:08:33,082 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 140 flow [2023-11-17 16:08:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 333.5) internal successors, (1334), 4 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:33,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:33,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:08:33,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:33,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash -549335913, now seen corresponding path program 1 times [2023-11-17 16:08:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:33,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101978387] [2023-11-17 16:08:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:33,184 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 16:08:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101978387] [2023-11-17 16:08:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101978387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016071655] [2023-11-17 16:08:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:33,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:33,188 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 16:08:33,215 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 16:08:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:33,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:08:33,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:33,420 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 16:08:33,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:33,607 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 16:08:33,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016071655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:33,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:33,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-17 16:08:33,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027605459] [2023-11-17 16:08:33,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:08:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:08:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:08:33,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 766 [2023-11-17 16:08:33,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:33,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 766 [2023-11-17 16:08:33,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:33,943 INFO L124 PetriNetUnfolderBase]: 1127/1593 cut-off events. [2023-11-17 16:08:33,943 INFO L125 PetriNetUnfolderBase]: For 1254/1254 co-relation queries the response was YES. [2023-11-17 16:08:33,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4326 conditions, 1593 events. 1127/1593 cut-off events. For 1254/1254 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5414 event pairs, 277 based on Foata normal form. 1/1590 useless extension candidates. Maximal degree in co-relation 4302. Up to 1205 conditions per place. [2023-11-17 16:08:33,949 INFO L140 encePairwiseOnDemand]: 762/766 looper letters, 57 selfloop transitions, 4 changer transitions 3/64 dead transitions. [2023-11-17 16:08:33,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 340 flow [2023-11-17 16:08:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1373 transitions. [2023-11-17 16:08:33,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44810704960835507 [2023-11-17 16:08:33,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1373 transitions. [2023-11-17 16:08:33,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1373 transitions. [2023-11-17 16:08:33,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:33,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1373 transitions. [2023-11-17 16:08:33,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,958 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 140 flow. Second operand 4 states and 1373 transitions. [2023-11-17 16:08:33,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 340 flow [2023-11-17 16:08:33,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 333 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:33,960 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 166 flow [2023-11-17 16:08:33,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 16:08:33,961 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-17 16:08:33,961 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 166 flow [2023-11-17 16:08:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:33,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:33,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 16:08:34,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:08:34,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:34,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash 955085232, now seen corresponding path program 2 times [2023-11-17 16:08:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:34,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954922831] [2023-11-17 16:08:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:34,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954922831] [2023-11-17 16:08:34,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954922831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746603502] [2023-11-17 16:08:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:34,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:34,408 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 16:08:34,456 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 16:08:34,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:34,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:34,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:08:34,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:34,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:34,921 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 212 treesize of output 226 [2023-11-17 16:08:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746603502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:35,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:35,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 16:08:35,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800063593] [2023-11-17 16:08:35,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:35,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:08:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:08:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:08:35,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 766 [2023-11-17 16:08:35,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 166 flow. Second operand has 13 states, 13 states have (on average 258.84615384615387) internal successors, (3365), 13 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:35,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 766 [2023-11-17 16:08:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:36,105 INFO L124 PetriNetUnfolderBase]: 1818/2626 cut-off events. [2023-11-17 16:08:36,105 INFO L125 PetriNetUnfolderBase]: For 2584/2584 co-relation queries the response was YES. [2023-11-17 16:08:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7194 conditions, 2626 events. 1818/2626 cut-off events. For 2584/2584 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10411 event pairs, 456 based on Foata normal form. 180/2797 useless extension candidates. Maximal degree in co-relation 7170. Up to 984 conditions per place. [2023-11-17 16:08:36,115 INFO L140 encePairwiseOnDemand]: 753/766 looper letters, 87 selfloop transitions, 14 changer transitions 26/127 dead transitions. [2023-11-17 16:08:36,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 127 transitions, 663 flow [2023-11-17 16:08:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:08:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:08:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2655 transitions. [2023-11-17 16:08:36,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34660574412532635 [2023-11-17 16:08:36,122 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2655 transitions. [2023-11-17 16:08:36,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2655 transitions. [2023-11-17 16:08:36,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:36,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2655 transitions. [2023-11-17 16:08:36,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 265.5) internal successors, (2655), 10 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,133 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,133 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 166 flow. Second operand 10 states and 2655 transitions. [2023-11-17 16:08:36,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 127 transitions, 663 flow [2023-11-17 16:08:36,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 127 transitions, 650 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:36,139 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 252 flow [2023-11-17 16:08:36,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=252, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-17 16:08:36,141 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-11-17 16:08:36,141 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 252 flow [2023-11-17 16:08:36,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 258.84615384615387) internal successors, (3365), 13 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:36,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:36,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:36,357 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,SelfDestructingSolverStorable6 [2023-11-17 16:08:36,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:36,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash -849792023, now seen corresponding path program 1 times [2023-11-17 16:08:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174832306] [2023-11-17 16:08:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:36,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:37,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174832306] [2023-11-17 16:08:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174832306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728477898] [2023-11-17 16:08:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:37,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:37,017 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 16:08:37,045 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 16:08:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:37,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:08:37,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:37,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:38,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:38,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 374 treesize of output 571 [2023-11-17 16:08:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728477898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:44,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-17 16:08:44,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547960421] [2023-11-17 16:08:44,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:44,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:08:44,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:08:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:08:44,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 766 [2023-11-17 16:08:44,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 252 flow. Second operand has 17 states, 17 states have (on average 229.94117647058823) internal successors, (3909), 17 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:44,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:44,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 766 [2023-11-17 16:08:44,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:45,405 INFO L124 PetriNetUnfolderBase]: 3305/4790 cut-off events. [2023-11-17 16:08:45,405 INFO L125 PetriNetUnfolderBase]: For 6988/6988 co-relation queries the response was YES. [2023-11-17 16:08:45,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14245 conditions, 4790 events. 3305/4790 cut-off events. For 6988/6988 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21986 event pairs, 532 based on Foata normal form. 6/4788 useless extension candidates. Maximal degree in co-relation 10670. Up to 2283 conditions per place. [2023-11-17 16:08:45,430 INFO L140 encePairwiseOnDemand]: 758/766 looper letters, 108 selfloop transitions, 30 changer transitions 37/175 dead transitions. [2023-11-17 16:08:45,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 175 transitions, 1087 flow [2023-11-17 16:08:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:08:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:08:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2627 transitions. [2023-11-17 16:08:45,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3117730833135533 [2023-11-17 16:08:45,435 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2627 transitions. [2023-11-17 16:08:45,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2627 transitions. [2023-11-17 16:08:45,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:45,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2627 transitions. [2023-11-17 16:08:45,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 238.8181818181818) internal successors, (2627), 11 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:45,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 766.0) internal successors, (9192), 12 states have internal predecessors, (9192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:45,451 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 766.0) internal successors, (9192), 12 states have internal predecessors, (9192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:45,451 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 252 flow. Second operand 11 states and 2627 transitions. [2023-11-17 16:08:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 175 transitions, 1087 flow [2023-11-17 16:08:45,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 175 transitions, 1077 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:45,467 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 564 flow [2023-11-17 16:08:45,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=564, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-11-17 16:08:45,470 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-11-17 16:08:45,470 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 564 flow [2023-11-17 16:08:45,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 229.94117647058823) internal successors, (3909), 17 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:45,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:45,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:45,487 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 16:08:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:45,676 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:45,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash 123171055, now seen corresponding path program 1 times [2023-11-17 16:08:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:45,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930587853] [2023-11-17 16:08:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:45,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:45,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930587853] [2023-11-17 16:08:45,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930587853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:45,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:45,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:45,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603042774] [2023-11-17 16:08:45,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:45,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 766 [2023-11-17 16:08:45,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 564 flow. Second operand has 5 states, 5 states have (on average 281.8) internal successors, (1409), 5 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:45,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:45,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 766 [2023-11-17 16:08:45,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:47,259 INFO L124 PetriNetUnfolderBase]: 5655/8362 cut-off events. [2023-11-17 16:08:47,260 INFO L125 PetriNetUnfolderBase]: For 17751/17751 co-relation queries the response was YES. [2023-11-17 16:08:47,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26734 conditions, 8362 events. 5655/8362 cut-off events. For 17751/17751 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44293 event pairs, 3876 based on Foata normal form. 280/8632 useless extension candidates. Maximal degree in co-relation 22874. Up to 3583 conditions per place. [2023-11-17 16:08:47,301 INFO L140 encePairwiseOnDemand]: 756/766 looper letters, 115 selfloop transitions, 23 changer transitions 0/138 dead transitions. [2023-11-17 16:08:47,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 138 transitions, 1285 flow [2023-11-17 16:08:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:08:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:08:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1737 transitions. [2023-11-17 16:08:47,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779373368146214 [2023-11-17 16:08:47,305 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1737 transitions. [2023-11-17 16:08:47,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1737 transitions. [2023-11-17 16:08:47,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:47,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1737 transitions. [2023-11-17 16:08:47,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 289.5) internal successors, (1737), 6 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:47,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:47,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:47,312 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 564 flow. Second operand 6 states and 1737 transitions. [2023-11-17 16:08:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 138 transitions, 1285 flow [2023-11-17 16:08:47,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 138 transitions, 1165 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:47,361 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 578 flow [2023-11-17 16:08:47,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-11-17 16:08:47,362 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2023-11-17 16:08:47,362 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 578 flow [2023-11-17 16:08:47,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 281.8) internal successors, (1409), 5 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:47,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:47,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:47,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 16:08:47,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:47,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1297843663, now seen corresponding path program 1 times [2023-11-17 16:08:47,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:47,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291686445] [2023-11-17 16:08:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:47,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:47,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:47,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291686445] [2023-11-17 16:08:47,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291686445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:47,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446151042] [2023-11-17 16:08:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:47,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:47,670 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 16:08:47,689 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 16:08:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:47,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:08:47,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:47,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:08:47,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446151042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:47,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:08:47,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-17 16:08:47,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091401009] [2023-11-17 16:08:47,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:47,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:47,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:08:47,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 766 [2023-11-17 16:08:47,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 281.8) internal successors, (1409), 5 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:47,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:47,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 766 [2023-11-17 16:08:47,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:50,302 INFO L124 PetriNetUnfolderBase]: 9929/14956 cut-off events. [2023-11-17 16:08:50,302 INFO L125 PetriNetUnfolderBase]: For 24388/24388 co-relation queries the response was YES. [2023-11-17 16:08:50,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43696 conditions, 14956 events. 9929/14956 cut-off events. For 24388/24388 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 90111 event pairs, 7328 based on Foata normal form. 432/15372 useless extension candidates. Maximal degree in co-relation 37467. Up to 6606 conditions per place. [2023-11-17 16:08:50,384 INFO L140 encePairwiseOnDemand]: 756/766 looper letters, 122 selfloop transitions, 22 changer transitions 0/144 dead transitions. [2023-11-17 16:08:50,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 144 transitions, 1307 flow [2023-11-17 16:08:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:08:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:08:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1739 transitions. [2023-11-17 16:08:50,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37837249782419496 [2023-11-17 16:08:50,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1739 transitions. [2023-11-17 16:08:50,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1739 transitions. [2023-11-17 16:08:50,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:50,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1739 transitions. [2023-11-17 16:08:50,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 289.8333333333333) internal successors, (1739), 6 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,396 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,396 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 578 flow. Second operand 6 states and 1739 transitions. [2023-11-17 16:08:50,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 144 transitions, 1307 flow [2023-11-17 16:08:50,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 144 transitions, 1279 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:50,459 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 654 flow [2023-11-17 16:08:50,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=654, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-11-17 16:08:50,460 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-11-17 16:08:50,461 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 654 flow [2023-11-17 16:08:50,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 281.8) internal successors, (1409), 5 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:50,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:50,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 16:08:50,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:50,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:50,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash 308128846, now seen corresponding path program 1 times [2023-11-17 16:08:50,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:50,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378242552] [2023-11-17 16:08:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:50,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:50,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378242552] [2023-11-17 16:08:50,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378242552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727455213] [2023-11-17 16:08:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:50,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:50,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:50,808 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 16:08:50,833 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 16:08:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:50,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:08:50,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:51,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:51,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:51,882 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 614 treesize of output 713 [2023-11-17 16:08:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727455213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:52,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:52,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-17 16:08:52,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136837620] [2023-11-17 16:08:52,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:52,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:08:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:08:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:08:52,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 766 [2023-11-17 16:08:52,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 654 flow. Second operand has 8 states, 8 states have (on average 294.5) internal successors, (2356), 8 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:52,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:52,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 766 [2023-11-17 16:08:52,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:56,107 INFO L124 PetriNetUnfolderBase]: 12249/18516 cut-off events. [2023-11-17 16:08:56,107 INFO L125 PetriNetUnfolderBase]: For 35829/35829 co-relation queries the response was YES. [2023-11-17 16:08:56,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53472 conditions, 18516 events. 12249/18516 cut-off events. For 35829/35829 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 114108 event pairs, 4620 based on Foata normal form. 616/19124 useless extension candidates. Maximal degree in co-relation 45998. Up to 6126 conditions per place. [2023-11-17 16:08:56,256 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 103 selfloop transitions, 10 changer transitions 8/121 dead transitions. [2023-11-17 16:08:56,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 1032 flow [2023-11-17 16:08:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1521 transitions. [2023-11-17 16:08:56,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3971279373368146 [2023-11-17 16:08:56,259 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1521 transitions. [2023-11-17 16:08:56,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1521 transitions. [2023-11-17 16:08:56,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:56,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1521 transitions. [2023-11-17 16:08:56,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.2) internal successors, (1521), 5 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,266 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 654 flow. Second operand 5 states and 1521 transitions. [2023-11-17 16:08:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 1032 flow [2023-11-17 16:08:56,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 1007 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:56,339 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 622 flow [2023-11-17 16:08:56,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=622, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-11-17 16:08:56,339 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-11-17 16:08:56,340 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 622 flow [2023-11-17 16:08:56,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 294.5) internal successors, (2356), 8 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:56,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:56,353 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 16:08:56,546 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,SelfDestructingSolverStorable10 [2023-11-17 16:08:56,547 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:56,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash 938467205, now seen corresponding path program 1 times [2023-11-17 16:08:56,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:56,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034973483] [2023-11-17 16:08:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:56,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:56,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034973483] [2023-11-17 16:08:56,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034973483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643829453] [2023-11-17 16:08:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:56,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:56,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:56,790 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 16:08:56,806 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 16:08:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:56,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:08:56,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:57,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:58,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:58,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 671 [2023-11-17 16:09:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:02,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643829453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:02,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:02,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:09:02,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206138082] [2023-11-17 16:09:02,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:02,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:09:02,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:02,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:09:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:09:02,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 766 [2023-11-17 16:09:02,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 622 flow. Second operand has 12 states, 12 states have (on average 285.5833333333333) internal successors, (3427), 12 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:02,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 766 [2023-11-17 16:09:02,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:05,713 INFO L124 PetriNetUnfolderBase]: 11941/18332 cut-off events. [2023-11-17 16:09:05,713 INFO L125 PetriNetUnfolderBase]: For 34947/34947 co-relation queries the response was YES. [2023-11-17 16:09:05,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52884 conditions, 18332 events. 11941/18332 cut-off events. For 34947/34947 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 116922 event pairs, 2412 based on Foata normal form. 600/18924 useless extension candidates. Maximal degree in co-relation 43746. Up to 4647 conditions per place. [2023-11-17 16:09:05,885 INFO L140 encePairwiseOnDemand]: 762/766 looper letters, 109 selfloop transitions, 25 changer transitions 22/156 dead transitions. [2023-11-17 16:09:05,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 156 transitions, 1199 flow [2023-11-17 16:09:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:09:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:09:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2370 transitions. [2023-11-17 16:09:05,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38674934725848564 [2023-11-17 16:09:05,893 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2370 transitions. [2023-11-17 16:09:05,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2370 transitions. [2023-11-17 16:09:05,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:05,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2370 transitions. [2023-11-17 16:09:05,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 296.25) internal successors, (2370), 8 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 766.0) internal successors, (6894), 9 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,907 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 766.0) internal successors, (6894), 9 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,907 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 622 flow. Second operand 8 states and 2370 transitions. [2023-11-17 16:09:05,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 156 transitions, 1199 flow [2023-11-17 16:09:06,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 156 transitions, 1194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:09:06,087 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 748 flow [2023-11-17 16:09:06,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=748, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2023-11-17 16:09:06,089 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 54 predicate places. [2023-11-17 16:09:06,089 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 748 flow [2023-11-17 16:09:06,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 285.5833333333333) internal successors, (3427), 12 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:06,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:06,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 16:09:06,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:06,298 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:09:06,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:06,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1383765602, now seen corresponding path program 1 times [2023-11-17 16:09:06,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:06,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433495989] [2023-11-17 16:09:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:06,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433495989] [2023-11-17 16:09:06,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433495989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:06,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720277326] [2023-11-17 16:09:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:06,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:06,517 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 16:09:06,538 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 16:09:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:06,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:09:06,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:07,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:07,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:07,727 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 617 treesize of output 716 [2023-11-17 16:09:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:08,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720277326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:08,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:08,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-17 16:09:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628184873] [2023-11-17 16:09:08,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:08,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:09:08,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:09:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:09:08,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 766 [2023-11-17 16:09:08,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 748 flow. Second operand has 10 states, 10 states have (on average 290.3) internal successors, (2903), 10 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 766 [2023-11-17 16:09:08,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:11,459 INFO L124 PetriNetUnfolderBase]: 10773/16668 cut-off events. [2023-11-17 16:09:11,459 INFO L125 PetriNetUnfolderBase]: For 40735/40735 co-relation queries the response was YES. [2023-11-17 16:09:11,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51030 conditions, 16668 events. 10773/16668 cut-off events. For 40735/40735 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 105108 event pairs, 4368 based on Foata normal form. 192/16852 useless extension candidates. Maximal degree in co-relation 47700. Up to 7999 conditions per place. [2023-11-17 16:09:11,575 INFO L140 encePairwiseOnDemand]: 763/766 looper letters, 74 selfloop transitions, 7 changer transitions 16/97 dead transitions. [2023-11-17 16:09:11,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 914 flow [2023-11-17 16:09:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:09:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:09:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1193 transitions. [2023-11-17 16:09:11,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893603133159269 [2023-11-17 16:09:11,578 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1193 transitions. [2023-11-17 16:09:11,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1193 transitions. [2023-11-17 16:09:11,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:11,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1193 transitions. [2023-11-17 16:09:11,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,582 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,582 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 748 flow. Second operand 4 states and 1193 transitions. [2023-11-17 16:09:11,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 914 flow [2023-11-17 16:09:11,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 871 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-17 16:09:11,736 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 635 flow [2023-11-17 16:09:11,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=635, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-11-17 16:09:11,736 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-11-17 16:09:11,736 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 635 flow [2023-11-17 16:09:11,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 290.3) internal successors, (2903), 10 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:11,737 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:11,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:09:11,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:11,942 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:09:11,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 305623635, now seen corresponding path program 2 times [2023-11-17 16:09:11,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:11,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302642119] [2023-11-17 16:09:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302642119] [2023-11-17 16:09:12,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302642119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321619985] [2023-11-17 16:09:12,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:12,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:12,345 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 16:09:12,366 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 16:09:12,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:12,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:12,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:09:12,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:12,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:13,664 INFO L349 Elim1Store]: treesize reduction 114, result has 68.9 percent of original size [2023-11-17 16:09:13,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 719 treesize of output 875 [2023-11-17 16:09:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:18,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321619985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:18,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:18,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:09:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271502675] [2023-11-17 16:09:18,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:09:18,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:09:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:09:18,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 766 [2023-11-17 16:09:18,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 635 flow. Second operand has 12 states, 12 states have (on average 228.5) internal successors, (2742), 12 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:18,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:18,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 766 [2023-11-17 16:09:18,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:20,187 INFO L124 PetriNetUnfolderBase]: 9071/14102 cut-off events. [2023-11-17 16:09:20,187 INFO L125 PetriNetUnfolderBase]: For 27477/27477 co-relation queries the response was YES. [2023-11-17 16:09:20,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41459 conditions, 14102 events. 9071/14102 cut-off events. For 27477/27477 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 87541 event pairs, 2496 based on Foata normal form. 128/14222 useless extension candidates. Maximal degree in co-relation 34724. Up to 5433 conditions per place. [2023-11-17 16:09:20,247 INFO L140 encePairwiseOnDemand]: 755/766 looper letters, 60 selfloop transitions, 19 changer transitions 83/162 dead transitions. [2023-11-17 16:09:20,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 162 transitions, 1261 flow [2023-11-17 16:09:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:09:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:09:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2367 transitions. [2023-11-17 16:09:20,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090078328981723 [2023-11-17 16:09:20,252 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2367 transitions. [2023-11-17 16:09:20,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2367 transitions. [2023-11-17 16:09:20,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:20,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2367 transitions. [2023-11-17 16:09:20,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 236.7) internal successors, (2367), 10 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,259 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 766.0) internal successors, (8426), 11 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,259 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 635 flow. Second operand 10 states and 2367 transitions. [2023-11-17 16:09:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 162 transitions, 1261 flow [2023-11-17 16:09:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 162 transitions, 1239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:09:20,392 INFO L231 Difference]: Finished difference. Result has 94 places, 68 transitions, 611 flow [2023-11-17 16:09:20,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=611, PETRI_PLACES=94, PETRI_TRANSITIONS=68} [2023-11-17 16:09:20,393 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-11-17 16:09:20,393 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 68 transitions, 611 flow [2023-11-17 16:09:20,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 228.5) internal successors, (2742), 12 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:20,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:20,402 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 16:09:20,599 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,SelfDestructingSolverStorable13 [2023-11-17 16:09:20,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:09:20,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2070457936, now seen corresponding path program 1 times [2023-11-17 16:09:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:20,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376312359] [2023-11-17 16:09:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:20,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:21,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376312359] [2023-11-17 16:09:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376312359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091986028] [2023-11-17 16:09:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:21,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:21,046 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 16:09:21,048 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 16:09:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:21,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:09:21,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:21,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:23,456 INFO L349 Elim1Store]: treesize reduction 114, result has 68.9 percent of original size [2023-11-17 16:09:23,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 763 treesize of output 903 [2023-11-17 16:09:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:25,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091986028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:25,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:25,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-17 16:09:25,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130722858] [2023-11-17 16:09:25,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:25,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:09:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:09:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:09:25,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 766 [2023-11-17 16:09:25,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 68 transitions, 611 flow. Second operand has 15 states, 15 states have (on average 227.86666666666667) internal successors, (3418), 15 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:25,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:25,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 766 [2023-11-17 16:09:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:27,258 INFO L124 PetriNetUnfolderBase]: 5791/8870 cut-off events. [2023-11-17 16:09:27,258 INFO L125 PetriNetUnfolderBase]: For 20773/20773 co-relation queries the response was YES. [2023-11-17 16:09:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27308 conditions, 8870 events. 5791/8870 cut-off events. For 20773/20773 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 49588 event pairs, 1400 based on Foata normal form. 112/8978 useless extension candidates. Maximal degree in co-relation 22673. Up to 3227 conditions per place. [2023-11-17 16:09:27,294 INFO L140 encePairwiseOnDemand]: 754/766 looper letters, 102 selfloop transitions, 38 changer transitions 50/190 dead transitions. [2023-11-17 16:09:27,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 190 transitions, 1491 flow [2023-11-17 16:09:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 16:09:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 16:09:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2843 transitions. [2023-11-17 16:09:27,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30929068755439515 [2023-11-17 16:09:27,298 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2843 transitions. [2023-11-17 16:09:27,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2843 transitions. [2023-11-17 16:09:27,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:27,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2843 transitions. [2023-11-17 16:09:27,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 236.91666666666666) internal successors, (2843), 12 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:27,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 766.0) internal successors, (9958), 13 states have internal predecessors, (9958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:27,307 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 766.0) internal successors, (9958), 13 states have internal predecessors, (9958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:27,307 INFO L175 Difference]: Start difference. First operand has 94 places, 68 transitions, 611 flow. Second operand 12 states and 2843 transitions. [2023-11-17 16:09:27,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 190 transitions, 1491 flow [2023-11-17 16:09:27,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 190 transitions, 1411 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-11-17 16:09:27,368 INFO L231 Difference]: Finished difference. Result has 96 places, 82 transitions, 830 flow [2023-11-17 16:09:27,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=830, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2023-11-17 16:09:27,369 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-11-17 16:09:27,369 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 830 flow [2023-11-17 16:09:27,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 227.86666666666667) internal successors, (3418), 15 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:27,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:27,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:27,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 16:09:27,575 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,SelfDestructingSolverStorable14 [2023-11-17 16:09:27,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:09:27,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash -487199386, now seen corresponding path program 2 times [2023-11-17 16:09:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:27,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040519657] [2023-11-17 16:09:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040519657] [2023-11-17 16:09:28,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040519657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355668692] [2023-11-17 16:09:28,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:28,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:28,895 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 16:09:28,925 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 16:09:29,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:29,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:29,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:09:29,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:29,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:32,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:32,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 455 treesize of output 992 [2023-11-17 16:09:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:09:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355668692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:39,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:39,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 18 [2023-11-17 16:09:39,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101688616] [2023-11-17 16:09:39,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:39,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:09:39,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:39,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:09:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:09:39,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 766 [2023-11-17 16:09:39,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 830 flow. Second operand has 20 states, 20 states have (on average 215.6) internal successors, (4312), 20 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:39,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:39,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 766 [2023-11-17 16:09:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:42,573 INFO L124 PetriNetUnfolderBase]: 7436/11370 cut-off events. [2023-11-17 16:09:42,573 INFO L125 PetriNetUnfolderBase]: For 31201/31201 co-relation queries the response was YES. [2023-11-17 16:09:42,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35598 conditions, 11370 events. 7436/11370 cut-off events. For 31201/31201 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 66122 event pairs, 1742 based on Foata normal form. 8/11372 useless extension candidates. Maximal degree in co-relation 32337. Up to 3485 conditions per place. [2023-11-17 16:09:42,727 INFO L140 encePairwiseOnDemand]: 752/766 looper letters, 107 selfloop transitions, 76 changer transitions 69/252 dead transitions. [2023-11-17 16:09:42,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 252 transitions, 2047 flow [2023-11-17 16:09:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:09:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:09:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4006 transitions. [2023-11-17 16:09:42,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2905425007252683 [2023-11-17 16:09:42,733 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4006 transitions. [2023-11-17 16:09:42,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4006 transitions. [2023-11-17 16:09:42,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:42,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4006 transitions. [2023-11-17 16:09:42,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 222.55555555555554) internal successors, (4006), 18 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:42,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 766.0) internal successors, (14554), 19 states have internal predecessors, (14554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:42,748 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 766.0) internal successors, (14554), 19 states have internal predecessors, (14554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:42,748 INFO L175 Difference]: Start difference. First operand has 96 places, 82 transitions, 830 flow. Second operand 18 states and 4006 transitions. [2023-11-17 16:09:42,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 252 transitions, 2047 flow [2023-11-17 16:09:42,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 252 transitions, 1989 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-17 16:09:42,836 INFO L231 Difference]: Finished difference. Result has 113 places, 113 transitions, 1345 flow [2023-11-17 16:09:42,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1345, PETRI_PLACES=113, PETRI_TRANSITIONS=113} [2023-11-17 16:09:42,837 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-11-17 16:09:42,837 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 113 transitions, 1345 flow [2023-11-17 16:09:42,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 215.6) internal successors, (4312), 20 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:42,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:42,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:42,849 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 16:09:43,043 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,SelfDestructingSolverStorable15 [2023-11-17 16:09:43,043 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:09:43,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1423899392, now seen corresponding path program 2 times [2023-11-17 16:09:43,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086605884] [2023-11-17 16:09:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086605884] [2023-11-17 16:09:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086605884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58592932] [2023-11-17 16:09:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:44,191 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 16:09:44,191 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 16:09:44,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:44,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:44,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:09:44,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:44,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:47,697 INFO L349 Elim1Store]: treesize reduction 236, result has 69.3 percent of original size [2023-11-17 16:09:47,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1224 treesize of output 1523 [2023-11-17 16:11:56,042 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-17 16:11:56,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-11-17 16:11:56,046 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-17 16:11:56,053 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 16:11:56,252 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,SelfDestructingSolverStorable16 [2023-11-17 16:11:56,253 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 77 more [2023-11-17 16:11:56,256 INFO L158 Benchmark]: Toolchain (without parser) took 218563.29ms. Allocated memory was 222.3MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 175.1MB in the beginning and 1.0GB in the end (delta: -869.7MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2023-11-17 16:11:56,256 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 168.8MB. Free memory was 117.3MB in the beginning and 117.1MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:11:56,256 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.17ms. Allocated memory is still 222.3MB. Free memory was 175.1MB in the beginning and 160.9MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-11-17 16:11:56,256 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.01ms. Allocated memory is still 222.3MB. Free memory was 160.9MB in the beginning and 157.8MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 16:11:56,257 INFO L158 Benchmark]: Boogie Preprocessor took 35.93ms. Allocated memory is still 222.3MB. Free memory was 157.8MB in the beginning and 154.6MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 16:11:56,257 INFO L158 Benchmark]: RCFGBuilder took 839.32ms. Allocated memory is still 222.3MB. Free memory was 154.6MB in the beginning and 145.8MB in the end (delta: 8.9MB). Peak memory consumption was 35.6MB. Max. memory is 8.0GB. [2023-11-17 16:11:56,257 INFO L158 Benchmark]: TraceAbstraction took 217395.54ms. Allocated memory was 222.3MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 145.2MB in the beginning and 1.0GB in the end (delta: -899.5MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2023-11-17 16:11:56,258 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 168.8MB. Free memory was 117.3MB in the beginning and 117.1MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 231.17ms. Allocated memory is still 222.3MB. Free memory was 175.1MB in the beginning and 160.9MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 56.01ms. Allocated memory is still 222.3MB. Free memory was 160.9MB in the beginning and 157.8MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.93ms. Allocated memory is still 222.3MB. Free memory was 157.8MB in the beginning and 154.6MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 839.32ms. Allocated memory is still 222.3MB. Free memory was 154.6MB in the beginning and 145.8MB in the end (delta: 8.9MB). Peak memory consumption was 35.6MB. Max. memory is 8.0GB. * TraceAbstraction took 217395.54ms. Allocated memory was 222.3MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 145.2MB in the beginning and 1.0GB in the end (delta: -899.5MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.9s, 333 PlacesBefore, 38 PlacesAfterwards, 357 TransitionsBefore, 33 TransitionsAfterwards, 5712 CoEnabledTransitionPairs, 8 FixpointIterations, 232 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 45 TrivialYvCompositions, 14 ConcurrentYvCompositions, 29 ChoiceCompositions, 392 TotalNumberOfCompositions, 5636 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5436, independent: 5413, independent conditional: 0, independent unconditional: 5413, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3738, independent: 3726, independent conditional: 0, independent unconditional: 3726, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3738, independent: 3726, independent conditional: 0, independent unconditional: 3726, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 100, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 100, dependent conditional: 0, dependent unconditional: 100, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5436, independent: 1687, independent conditional: 0, independent unconditional: 1687, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 3738, unknown conditional: 0, unknown unconditional: 3738] , Statistics on independence cache: Total cache size (in pairs): 84, Positive cache size: 81, Positive conditional cache size: 0, Positive unconditional cache size: 81, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...