/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/goblint-regression/28-race_reach_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:39:06,462 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:39:06,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:39:06,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:39:06,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:39:06,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:39:06,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:39:06,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:39:06,565 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:39:06,568 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:39:06,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:39:06,569 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:39:06,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:39:06,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:39:06,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:39:06,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:39:06,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:39:06,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:39:06,571 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:39:06,571 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:39:06,571 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:39:06,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:39:06,572 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:39:06,572 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:39:06,572 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:39:06,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:39:06,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:39:06,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:39:06,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:39:06,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:39:06,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:39:06,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:39:06,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:39:06,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:39:06,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:39:06,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:39:06,808 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:39:06,808 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:39:06,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-11-17 15:39:07,918 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:39:08,151 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:39:08,153 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-11-17 15:39:08,172 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7357dbbc/88cbb9914c944694b21a3bc6ae343f18/FLAGacfe59bc5 [2023-11-17 15:39:08,486 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7357dbbc/88cbb9914c944694b21a3bc6ae343f18 [2023-11-17 15:39:08,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:39:08,489 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:39:08,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:39:08,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:39:08,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:39:08,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be9f8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08, skipping insertion in model container [2023-11-17 15:39:08,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:39:08,768 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-11-17 15:39:08,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:39:08,799 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:39:08,819 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-11-17 15:39:08,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:39:08,872 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:39:08,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08 WrapperNode [2023-11-17 15:39:08,873 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:39:08,874 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:39:08,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:39:08,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:39:08,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,905 INFO L138 Inliner]: procedures = 271, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 219 [2023-11-17 15:39:08,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:39:08,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:39:08,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:39:08,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:39:08,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,919 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,927 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:39:08,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:39:08,928 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:39:08,928 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:39:08,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (1/1) ... [2023-11-17 15:39:08,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:39:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:08,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:39:08,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:39:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:39:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:39:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:39:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:39:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:39:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:39:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:39:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:39:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:39:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:39:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:39:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:39:08,978 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:39:09,113 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:39:09,115 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:39:09,371 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:39:09,397 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:39:09,397 INFO L307 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-17 15:39:09,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:39:09 BoogieIcfgContainer [2023-11-17 15:39:09,398 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:39:09,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:39:09,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:39:09,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:39:09,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:39:08" (1/3) ... [2023-11-17 15:39:09,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695fa4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:09, skipping insertion in model container [2023-11-17 15:39:09,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:08" (2/3) ... [2023-11-17 15:39:09,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695fa4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:09, skipping insertion in model container [2023-11-17 15:39:09,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:39:09" (3/3) ... [2023-11-17 15:39:09,403 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-11-17 15:39:09,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:39:09,415 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 15:39:09,415 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:39:09,457 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:39:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 211 transitions, 429 flow [2023-11-17 15:39:09,564 INFO L124 PetriNetUnfolderBase]: 45/290 cut-off events. [2023-11-17 15:39:09,564 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:39:09,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 290 events. 45/290 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2023-11-17 15:39:09,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 211 transitions, 429 flow [2023-11-17 15:39:09,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 206 transitions, 416 flow [2023-11-17 15:39:09,585 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:09,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 206 transitions, 416 flow [2023-11-17 15:39:09,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 206 transitions, 416 flow [2023-11-17 15:39:09,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 206 transitions, 416 flow [2023-11-17 15:39:09,629 INFO L124 PetriNetUnfolderBase]: 44/285 cut-off events. [2023-11-17 15:39:09,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:09,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 285 events. 44/285 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 903 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2023-11-17 15:39:09,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 13430 [2023-11-17 15:39:12,313 INFO L134 LiptonReduction]: Checked pairs total: 18793 [2023-11-17 15:39:12,313 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-11-17 15:39:12,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:12,343 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;@6a73b0d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:12,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:39:12,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:12,347 INFO L124 PetriNetUnfolderBase]: 9/30 cut-off events. [2023-11-17 15:39:12,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:12,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:12,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:39:12,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:12,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1271554201, now seen corresponding path program 1 times [2023-11-17 15:39:12,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:12,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877961019] [2023-11-17 15:39:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:12,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:12,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:12,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877961019] [2023-11-17 15:39:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877961019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:12,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:12,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665116341] [2023-11-17 15:39:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:12,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:12,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:12,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-11-17 15:39:12,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 65 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:12,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:12,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-11-17 15:39:12,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:12,684 INFO L124 PetriNetUnfolderBase]: 357/749 cut-off events. [2023-11-17 15:39:12,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:12,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 749 events. 357/749 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3538 event pairs, 320 based on Foata normal form. 78/710 useless extension candidates. Maximal degree in co-relation 1398. Up to 700 conditions per place. [2023-11-17 15:39:12,689 INFO L140 encePairwiseOnDemand]: 390/413 looper letters, 39 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-17 15:39:12,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 178 flow [2023-11-17 15:39:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-11-17 15:39:12,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42534301856335754 [2023-11-17 15:39:12,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-11-17 15:39:12,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-11-17 15:39:12,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:12,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-11-17 15:39:12,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:12,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:12,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:12,714 INFO L175 Difference]: Start difference. First operand has 45 places, 65 transitions, 134 flow. Second operand 3 states and 527 transitions. [2023-11-17 15:39:12,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 178 flow [2023-11-17 15:39:12,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:12,717 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 106 flow [2023-11-17 15:39:12,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-17 15:39:12,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-17 15:39:12,720 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 106 flow [2023-11-17 15:39:12,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:12,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:12,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:39:12,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:39:12,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:12,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:12,722 INFO L85 PathProgramCache]: Analyzing trace with hash -300920594, now seen corresponding path program 1 times [2023-11-17 15:39:12,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:12,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069512845] [2023-11-17 15:39:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:12,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:12,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:12,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069512845] [2023-11-17 15:39:12,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069512845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:12,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045792312] [2023-11-17 15:39:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:12,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:12,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:12,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:39:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:12,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 15:39:12,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:39:12,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:39:12,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045792312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:39:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 15:39:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250608362] [2023-11-17 15:39:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:39:12,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-11-17 15:39:12,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:12,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:12,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-11-17 15:39:12,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:13,071 INFO L124 PetriNetUnfolderBase]: 358/738 cut-off events. [2023-11-17 15:39:13,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:13,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 738 events. 358/738 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3574 event pairs, 152 based on Foata normal form. 0/627 useless extension candidates. Maximal degree in co-relation 1420. Up to 664 conditions per place. [2023-11-17 15:39:13,075 INFO L140 encePairwiseOnDemand]: 410/413 looper letters, 56 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-17 15:39:13,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 256 flow [2023-11-17 15:39:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-11-17 15:39:13,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42211460855528654 [2023-11-17 15:39:13,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-11-17 15:39:13,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-11-17 15:39:13,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:13,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-11-17 15:39:13,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,083 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 106 flow. Second operand 3 states and 523 transitions. [2023-11-17 15:39:13,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 256 flow [2023-11-17 15:39:13,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 252 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:39:13,085 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 110 flow [2023-11-17 15:39:13,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-17 15:39:13,087 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-11-17 15:39:13,088 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 110 flow [2023-11-17 15:39:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:39:13,101 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 15:39:13,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:13,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:13,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:13,302 INFO L85 PathProgramCache]: Analyzing trace with hash -749800365, now seen corresponding path program 1 times [2023-11-17 15:39:13,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:13,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069770578] [2023-11-17 15:39:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:13,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:39:13,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:13,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069770578] [2023-11-17 15:39:13,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069770578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:13,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382987697] [2023-11-17 15:39:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:13,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:13,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:13,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:13,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:39:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:13,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:39:13,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:39:13,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:39:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:39:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382987697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:39:13,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:39:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:39:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700400443] [2023-11-17 15:39:13,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:39:13,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:39:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:39:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:39:13,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-11-17 15:39:13,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:13,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-11-17 15:39:13,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:13,619 INFO L124 PetriNetUnfolderBase]: 357/732 cut-off events. [2023-11-17 15:39:13,619 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-17 15:39:13,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 732 events. 357/732 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3385 event pairs, 320 based on Foata normal form. 3/639 useless extension candidates. Maximal degree in co-relation 1456. Up to 682 conditions per place. [2023-11-17 15:39:13,621 INFO L140 encePairwiseOnDemand]: 410/413 looper letters, 39 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-17 15:39:13,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 210 flow [2023-11-17 15:39:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:39:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:39:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 977 transitions. [2023-11-17 15:39:13,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39426957223567394 [2023-11-17 15:39:13,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 977 transitions. [2023-11-17 15:39:13,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 977 transitions. [2023-11-17 15:39:13,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:13,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 977 transitions. [2023-11-17 15:39:13,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,630 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 110 flow. Second operand 6 states and 977 transitions. [2023-11-17 15:39:13,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 210 flow [2023-11-17 15:39:13,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:39:13,632 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 142 flow [2023-11-17 15:39:13,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-17 15:39:13,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-11-17 15:39:13,633 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 142 flow [2023-11-17 15:39:13,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:13,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:13,634 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-17 15:39:13,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:39:13,839 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,SelfDestructingSolverStorable2 [2023-11-17 15:39:13,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:13,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash 389059784, now seen corresponding path program 2 times [2023-11-17 15:39:13,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:13,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570565506] [2023-11-17 15:39:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:13,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:39:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570565506] [2023-11-17 15:39:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570565506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887117263] [2023-11-17 15:39:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:39:13,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:13,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:13,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:39:14,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:39:14,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:39:14,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 15:39:14,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:39:14,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:39:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:39:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887117263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:39:14,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:39:14,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 15:39:14,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944427415] [2023-11-17 15:39:14,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:39:14,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 15:39:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:14,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 15:39:14,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 15:39:14,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-11-17 15:39:14,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 142 flow. Second operand has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:14,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:14,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-11-17 15:39:14,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:14,226 INFO L124 PetriNetUnfolderBase]: 358/738 cut-off events. [2023-11-17 15:39:14,226 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-17 15:39:14,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 738 events. 358/738 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3377 event pairs, 320 based on Foata normal form. 6/648 useless extension candidates. Maximal degree in co-relation 1445. Up to 682 conditions per place. [2023-11-17 15:39:14,228 INFO L140 encePairwiseOnDemand]: 410/413 looper letters, 39 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-11-17 15:39:14,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 278 flow [2023-11-17 15:39:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:39:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:39:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1916 transitions. [2023-11-17 15:39:14,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38660209846650523 [2023-11-17 15:39:14,232 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1916 transitions. [2023-11-17 15:39:14,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1916 transitions. [2023-11-17 15:39:14,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:14,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1916 transitions. [2023-11-17 15:39:14,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.66666666666666) internal successors, (1916), 12 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:14,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:14,241 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:14,242 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 142 flow. Second operand 12 states and 1916 transitions. [2023-11-17 15:39:14,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 278 flow [2023-11-17 15:39:14,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 264 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 15:39:14,244 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 212 flow [2023-11-17 15:39:14,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=212, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-11-17 15:39:14,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2023-11-17 15:39:14,244 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 212 flow [2023-11-17 15:39:14,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:14,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:14,245 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-17 15:39:14,265 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 15:39:14,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:14,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:14,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1375545112, now seen corresponding path program 3 times [2023-11-17 15:39:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:14,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442535859] [2023-11-17 15:39:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:14,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:14,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:39:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:14,493 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:39:14,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:39:14,494 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:39:14,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:39:14,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:39:14,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:39:14,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:39:14,496 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-11-17 15:39:14,497 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:39:14,497 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:39:14,519 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:39:14,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 292 transitions, 600 flow [2023-11-17 15:39:14,562 INFO L124 PetriNetUnfolderBase]: 75/476 cut-off events. [2023-11-17 15:39:14,562 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 15:39:14,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 476 events. 75/476 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1951 event pairs, 0 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 292. Up to 12 conditions per place. [2023-11-17 15:39:14,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 292 transitions, 600 flow [2023-11-17 15:39:14,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 292 transitions, 600 flow [2023-11-17 15:39:14,570 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:14,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 292 transitions, 600 flow [2023-11-17 15:39:14,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 292 transitions, 600 flow [2023-11-17 15:39:14,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 292 transitions, 600 flow [2023-11-17 15:39:14,607 INFO L124 PetriNetUnfolderBase]: 75/476 cut-off events. [2023-11-17 15:39:14,608 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 15:39:14,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 476 events. 75/476 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1951 event pairs, 0 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 292. Up to 12 conditions per place. [2023-11-17 15:39:14,629 INFO L119 LiptonReduction]: Number of co-enabled transitions 41080 [2023-11-17 15:39:18,195 INFO L134 LiptonReduction]: Checked pairs total: 60592 [2023-11-17 15:39:18,196 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-11-17 15:39:18,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:18,204 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;@6a73b0d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:18,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:39:18,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:18,206 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-11-17 15:39:18,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:18,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:18,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:39:18,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:18,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash -687610828, now seen corresponding path program 1 times [2023-11-17 15:39:18,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:18,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5832782] [2023-11-17 15:39:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5832782] [2023-11-17 15:39:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5832782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:18,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:18,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:18,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78532929] [2023-11-17 15:39:18,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:18,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 571 [2023-11-17 15:39:18,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:18,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:18,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 571 [2023-11-17 15:39:18,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:19,444 INFO L124 PetriNetUnfolderBase]: 11639/18219 cut-off events. [2023-11-17 15:39:19,445 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-17 15:39:19,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35336 conditions, 18219 events. 11639/18219 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 118459 event pairs, 10854 based on Foata normal form. 2016/17525 useless extension candidates. Maximal degree in co-relation 14468. Up to 17028 conditions per place. [2023-11-17 15:39:19,522 INFO L140 encePairwiseOnDemand]: 537/571 looper letters, 58 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-17 15:39:19,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 276 flow [2023-11-17 15:39:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2023-11-17 15:39:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267367192060712 [2023-11-17 15:39:19,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2023-11-17 15:39:19,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2023-11-17 15:39:19,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:19,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2023-11-17 15:39:19,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:19,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:19,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:19,528 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 216 flow. Second operand 3 states and 731 transitions. [2023-11-17 15:39:19,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 276 flow [2023-11-17 15:39:19,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:19,532 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 166 flow [2023-11-17 15:39:19,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-11-17 15:39:19,535 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-11-17 15:39:19,535 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 166 flow [2023-11-17 15:39:19,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:19,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:19,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:39:19,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:39:19,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:19,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1711116157, now seen corresponding path program 1 times [2023-11-17 15:39:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:19,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710003139] [2023-11-17 15:39:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:19,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710003139] [2023-11-17 15:39:19,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710003139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:19,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170538403] [2023-11-17 15:39:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:19,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:19,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:19,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 15:39:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:19,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 15:39:19,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:39:19,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:39:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170538403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:19,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:39:19,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 15:39:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005753886] [2023-11-17 15:39:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:19,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:39:19,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 571 [2023-11-17 15:39:19,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:19,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:19,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 571 [2023-11-17 15:39:19,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:20,847 INFO L124 PetriNetUnfolderBase]: 11449/17850 cut-off events. [2023-11-17 15:39:20,848 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-17 15:39:20,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34958 conditions, 17850 events. 11449/17850 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 116177 event pairs, 5184 based on Foata normal form. 0/15208 useless extension candidates. Maximal degree in co-relation 34945. Up to 16995 conditions per place. [2023-11-17 15:39:20,935 INFO L140 encePairwiseOnDemand]: 568/571 looper letters, 75 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-17 15:39:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 354 flow [2023-11-17 15:39:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-11-17 15:39:20,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417980151780502 [2023-11-17 15:39:20,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-11-17 15:39:20,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-11-17 15:39:20,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:20,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-11-17 15:39:20,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:20,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:20,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:20,941 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 166 flow. Second operand 3 states and 716 transitions. [2023-11-17 15:39:20,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 354 flow [2023-11-17 15:39:20,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 350 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:39:20,946 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 174 flow [2023-11-17 15:39:20,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-17 15:39:20,947 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-11-17 15:39:20,947 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 174 flow [2023-11-17 15:39:20,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:20,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:20,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:39:20,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 15:39:21,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:21,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:21,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash -470767201, now seen corresponding path program 1 times [2023-11-17 15:39:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:21,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374394086] [2023-11-17 15:39:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:21,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:21,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:21,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374394086] [2023-11-17 15:39:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374394086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:21,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090866823] [2023-11-17 15:39:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:21,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:21,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:21,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:21,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 15:39:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:21,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:39:21,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:21,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:39:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:21,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090866823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:39:21,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:39:21,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 15:39:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344970576] [2023-11-17 15:39:21,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:39:21,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:39:21,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:39:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 15:39:21,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 571 [2023-11-17 15:39:21,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 174 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:21,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:21,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 571 [2023-11-17 15:39:21,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:22,556 INFO L124 PetriNetUnfolderBase]: 11716/18113 cut-off events. [2023-11-17 15:39:22,556 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2023-11-17 15:39:22,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35819 conditions, 18113 events. 11716/18113 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 115484 event pairs, 10854 based on Foata normal form. 3/15705 useless extension candidates. Maximal degree in co-relation 35791. Up to 17012 conditions per place. [2023-11-17 15:39:22,619 INFO L140 encePairwiseOnDemand]: 568/571 looper letters, 59 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-17 15:39:22,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 314 flow [2023-11-17 15:39:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:39:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:39:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1344 transitions. [2023-11-17 15:39:22,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922942206654991 [2023-11-17 15:39:22,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1344 transitions. [2023-11-17 15:39:22,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1344 transitions. [2023-11-17 15:39:22,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:22,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1344 transitions. [2023-11-17 15:39:22,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:22,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 571.0) internal successors, (3997), 7 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:22,628 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 571.0) internal successors, (3997), 7 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:22,628 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 174 flow. Second operand 6 states and 1344 transitions. [2023-11-17 15:39:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 314 flow [2023-11-17 15:39:22,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:39:22,630 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 208 flow [2023-11-17 15:39:22,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-11-17 15:39:22,630 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-11-17 15:39:22,631 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 208 flow [2023-11-17 15:39:22,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:22,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:22,631 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:39:22,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 15:39:22,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:22,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:22,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1043603664, now seen corresponding path program 2 times [2023-11-17 15:39:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:22,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963908828] [2023-11-17 15:39:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963908828] [2023-11-17 15:39:22,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963908828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810454901] [2023-11-17 15:39:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:39:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:22,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:22,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 15:39:23,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:39:23,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:39:23,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 15:39:23,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:23,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-17 15:39:23,132 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:39:23,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 15:39:23,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 15:39:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 15:39:23,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:39:23,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810454901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:23,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:39:23,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-17 15:39:23,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126807761] [2023-11-17 15:39:23,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:23,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:39:23,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:23,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:39:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-17 15:39:23,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 571 [2023-11-17 15:39:23,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 184.5) internal successors, (1107), 6 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:23,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:23,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 571 [2023-11-17 15:39:23,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:24,469 INFO L124 PetriNetUnfolderBase]: 12901/20325 cut-off events. [2023-11-17 15:39:24,469 INFO L125 PetriNetUnfolderBase]: For 712/712 co-relation queries the response was YES. [2023-11-17 15:39:24,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40534 conditions, 20325 events. 12901/20325 cut-off events. For 712/712 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 137589 event pairs, 2548 based on Foata normal form. 0/17928 useless extension candidates. Maximal degree in co-relation 40498. Up to 14831 conditions per place. [2023-11-17 15:39:24,578 INFO L140 encePairwiseOnDemand]: 562/571 looper letters, 143 selfloop transitions, 14 changer transitions 9/175 dead transitions. [2023-11-17 15:39:24,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 175 transitions, 773 flow [2023-11-17 15:39:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:39:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:39:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1261 transitions. [2023-11-17 15:39:24,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36806771745475775 [2023-11-17 15:39:24,581 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1261 transitions. [2023-11-17 15:39:24,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1261 transitions. [2023-11-17 15:39:24,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:24,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1261 transitions. [2023-11-17 15:39:24,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.16666666666666) internal successors, (1261), 6 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:24,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 571.0) internal successors, (3997), 7 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:24,588 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 571.0) internal successors, (3997), 7 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:24,588 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 208 flow. Second operand 6 states and 1261 transitions. [2023-11-17 15:39:24,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 175 transitions, 773 flow [2023-11-17 15:39:24,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 175 transitions, 759 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 15:39:24,591 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 278 flow [2023-11-17 15:39:24,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-11-17 15:39:24,593 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-11-17 15:39:24,593 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 278 flow [2023-11-17 15:39:24,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.5) internal successors, (1107), 6 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:24,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:24,595 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-17 15:39:24,609 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 15:39:24,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:24,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:24,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1103648309, now seen corresponding path program 1 times [2023-11-17 15:39:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:24,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100411082] [2023-11-17 15:39:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:39:24,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100411082] [2023-11-17 15:39:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100411082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:39:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624944498] [2023-11-17 15:39:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:24,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:24,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:24,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:39:24,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 15:39:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:24,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 15:39:24,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:39:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:39:24,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:39:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:39:25,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624944498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:39:25,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:39:25,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 15:39:25,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959380868] [2023-11-17 15:39:25,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:39:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 15:39:25,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:25,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 15:39:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 15:39:25,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 571 [2023-11-17 15:39:25,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 278 flow. Second operand has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:25,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:25,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 571 [2023-11-17 15:39:25,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:26,460 INFO L124 PetriNetUnfolderBase]: 12167/19317 cut-off events. [2023-11-17 15:39:26,460 INFO L125 PetriNetUnfolderBase]: For 3694/3694 co-relation queries the response was YES. [2023-11-17 15:39:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41909 conditions, 19317 events. 12167/19317 cut-off events. For 3694/3694 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 131013 event pairs, 10786 based on Foata normal form. 6/17807 useless extension candidates. Maximal degree in co-relation 41851. Up to 18360 conditions per place. [2023-11-17 15:39:26,557 INFO L140 encePairwiseOnDemand]: 568/571 looper letters, 71 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-11-17 15:39:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 478 flow [2023-11-17 15:39:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:39:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:39:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2631 transitions. [2023-11-17 15:39:26,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839754816112084 [2023-11-17 15:39:26,563 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2631 transitions. [2023-11-17 15:39:26,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2631 transitions. [2023-11-17 15:39:26,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:26,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2631 transitions. [2023-11-17 15:39:26,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.25) internal successors, (2631), 12 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:26,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 571.0) internal successors, (7423), 13 states have internal predecessors, (7423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:26,575 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 571.0) internal successors, (7423), 13 states have internal predecessors, (7423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:26,575 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 278 flow. Second operand 12 states and 2631 transitions. [2023-11-17 15:39:26,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 478 flow [2023-11-17 15:39:26,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 478 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:26,580 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 362 flow [2023-11-17 15:39:26,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=362, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-11-17 15:39:26,580 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-11-17 15:39:26,581 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 362 flow [2023-11-17 15:39:26,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:26,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:26,582 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-17 15:39:26,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 15:39:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:39:26,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:26,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1702593493, now seen corresponding path program 2 times [2023-11-17 15:39:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:26,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906292382] [2023-11-17 15:39:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:26,805 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:39:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:26,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:39:26,836 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:39:26,836 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:39:26,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:39:26,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:39:26,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:39:26,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:39:26,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:39:26,836 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-11-17 15:39:26,837 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:39:26,837 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:39:26,869 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:39:26,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 373 transitions, 773 flow [2023-11-17 15:39:26,943 INFO L124 PetriNetUnfolderBase]: 110/697 cut-off events. [2023-11-17 15:39:26,943 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-17 15:39:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 697 events. 110/697 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3222 event pairs, 1 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 484. Up to 16 conditions per place. [2023-11-17 15:39:26,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 373 transitions, 773 flow [2023-11-17 15:39:26,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 373 transitions, 773 flow [2023-11-17 15:39:26,959 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:26,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 373 transitions, 773 flow [2023-11-17 15:39:26,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 373 transitions, 773 flow [2023-11-17 15:39:26,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 373 transitions, 773 flow [2023-11-17 15:39:27,025 INFO L124 PetriNetUnfolderBase]: 110/697 cut-off events. [2023-11-17 15:39:27,026 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-17 15:39:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 697 events. 110/697 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3222 event pairs, 1 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 484. Up to 16 conditions per place. [2023-11-17 15:39:27,059 INFO L119 LiptonReduction]: Number of co-enabled transitions 81054 [2023-11-17 15:39:31,472 INFO L134 LiptonReduction]: Checked pairs total: 121990 [2023-11-17 15:39:31,472 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-11-17 15:39:31,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:31,474 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;@6a73b0d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:31,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:39:31,476 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:31,476 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-11-17 15:39:31,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:31,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:31,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:39:31,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:39:31,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:31,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1423512982, now seen corresponding path program 1 times [2023-11-17 15:39:31,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553544866] [2023-11-17 15:39:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:31,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:31,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553544866] [2023-11-17 15:39:31,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553544866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:31,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:31,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371002901] [2023-11-17 15:39:31,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:31,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:31,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:31,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 727 [2023-11-17 15:39:31,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 131 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:31,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:31,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 727 [2023-11-17 15:39:31,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:58,223 INFO L124 PetriNetUnfolderBase]: 318644/440778 cut-off events. [2023-11-17 15:39:58,223 INFO L125 PetriNetUnfolderBase]: For 4163/4163 co-relation queries the response was YES. [2023-11-17 15:39:59,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864564 conditions, 440778 events. 318644/440778 cut-off events. For 4163/4163 co-relation queries the response was YES. Maximal size of possible extension queue 9099. Compared 3305791 event pairs, 303217 based on Foata normal form. 55469/434610 useless extension candidates. Maximal degree in co-relation 108561. Up to 421600 conditions per place. [2023-11-17 15:40:00,696 INFO L140 encePairwiseOnDemand]: 683/727 looper letters, 77 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-17 15:40:00,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 367 flow [2023-11-17 15:40:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:40:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:40:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 934 transitions. [2023-11-17 15:40:00,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42824392480513523 [2023-11-17 15:40:00,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 934 transitions. [2023-11-17 15:40:00,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 934 transitions. [2023-11-17 15:40:00,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:00,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 934 transitions. [2023-11-17 15:40:00,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:40:00,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 727.0) internal successors, (2908), 4 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:40:00,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 727.0) internal successors, (2908), 4 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:40:00,703 INFO L175 Difference]: Start difference. First operand has 89 places, 131 transitions, 289 flow. Second operand 3 states and 934 transitions. [2023-11-17 15:40:00,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 367 flow [2023-11-17 15:40:00,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 367 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:40:00,706 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 219 flow [2023-11-17 15:40:00,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=727, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-11-17 15:40:00,706 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2023-11-17 15:40:00,706 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 219 flow [2023-11-17 15:40:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:40:00,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:00,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:40:00,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:40:00,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:40:00,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1358599695, now seen corresponding path program 1 times [2023-11-17 15:40:00,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:00,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913916967] [2023-11-17 15:40:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:40:00,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913916967] [2023-11-17 15:40:00,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913916967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:40:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026189689] [2023-11-17 15:40:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:00,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:40:00,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:40:00,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:40:00,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 15:40:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:00,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 15:40:00,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:40:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:40:00,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:40:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026189689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:40:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:40:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 15:40:00,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041462564] [2023-11-17 15:40:00,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:40:00,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:40:00,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:40:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:40:00,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 727 [2023-11-17 15:40:00,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:40:00,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:00,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 727 [2023-11-17 15:40:00,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand