/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:36:44,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:36:44,946 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 11:36:44,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:36:44,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:36:44,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:36:44,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:36:44,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:36:44,983 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:36:44,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:36:44,987 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:36:44,988 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:36:44,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:36:44,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:36:44,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:36:44,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:36:44,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:36:44,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:36:44,990 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:36:44,990 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:36:44,990 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:36:44,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:36:44,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:36:44,992 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:36:44,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:36:44,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:36:44,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:36:44,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:36:44,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:36:44,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:36:44,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:36:44,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:36:44,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:36:45,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:36:45,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:36:45,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:36:45,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:36:45,249 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:36:45,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-11-17 11:36:46,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:36:46,758 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:36:46,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-11-17 11:36:46,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666210ec7/f376ce4893f44cb18425c0c3a8829287/FLAG0124d1b8e [2023-11-17 11:36:46,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/666210ec7/f376ce4893f44cb18425c0c3a8829287 [2023-11-17 11:36:46,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:36:46,801 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:36:46,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:36:46,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:36:46,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:36:46,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:36:46" (1/1) ... [2023-11-17 11:36:46,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc32869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:46, skipping insertion in model container [2023-11-17 11:36:46,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:36:46" (1/1) ... [2023-11-17 11:36:46,862 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:36:47,251 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_07-cond_racing2.i[41322,41335] [2023-11-17 11:36:47,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:36:47,295 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:36:47,358 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_07-cond_racing2.i[41322,41335] [2023-11-17 11:36:47,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:36:47,406 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:36:47,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47 WrapperNode [2023-11-17 11:36:47,406 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:36:47,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:36:47,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:36:47,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:36:47,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,454 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-17 11:36:47,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:36:47,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:36:47,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:36:47,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:36:47,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:36:47,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:36:47,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:36:47,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:36:47,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (1/1) ... [2023-11-17 11:36:47,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:36:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:36:47,517 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 11:36:47,536 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 11:36:47,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:36:47,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:36:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:36:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:36:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:36:47,548 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 11:36:47,693 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:36:47,695 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:36:47,974 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:36:48,104 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:36:48,105 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:36:48,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:36:48 BoogieIcfgContainer [2023-11-17 11:36:48,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:36:48,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:36:48,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:36:48,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:36:48,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:36:46" (1/3) ... [2023-11-17 11:36:48,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b645b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:36:48, skipping insertion in model container [2023-11-17 11:36:48,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:36:47" (2/3) ... [2023-11-17 11:36:48,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b645b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:36:48, skipping insertion in model container [2023-11-17 11:36:48,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:36:48" (3/3) ... [2023-11-17 11:36:48,116 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-11-17 11:36:48,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:36:48,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:36:48,134 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:36:48,182 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:36:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 58 transitions, 123 flow [2023-11-17 11:36:48,272 INFO L124 PetriNetUnfolderBase]: 19/87 cut-off events. [2023-11-17 11:36:48,272 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:36:48,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 87 events. 19/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-11-17 11:36:48,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 58 transitions, 123 flow [2023-11-17 11:36:48,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 56 transitions, 116 flow [2023-11-17 11:36:48,288 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:48,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 56 transitions, 116 flow [2023-11-17 11:36:48,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 56 transitions, 116 flow [2023-11-17 11:36:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 56 transitions, 116 flow [2023-11-17 11:36:48,315 INFO L124 PetriNetUnfolderBase]: 18/85 cut-off events. [2023-11-17 11:36:48,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 18/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 294 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-11-17 11:36:48,317 INFO L119 LiptonReduction]: Number of co-enabled transitions 1426 [2023-11-17 11:36:49,254 INFO L134 LiptonReduction]: Checked pairs total: 2738 [2023-11-17 11:36:49,254 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-11-17 11:36:49,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:36:49,277 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;@5940f8bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:36:49,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:36:49,288 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:36:49,288 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2023-11-17 11:36:49,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:49,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:36:49,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:49,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 12139405, now seen corresponding path program 1 times [2023-11-17 11:36:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:49,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948203470] [2023-11-17 11:36:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:49,630 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 11:36:49,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:49,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948203470] [2023-11-17 11:36:49,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948203470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:49,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:49,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:36:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941561086] [2023-11-17 11:36:49,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:49,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 105 [2023-11-17 11:36:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:49,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:49,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 105 [2023-11-17 11:36:49,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:49,778 INFO L124 PetriNetUnfolderBase]: 97/210 cut-off events. [2023-11-17 11:36:49,778 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:49,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 210 events. 97/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 70 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2023-11-17 11:36:49,781 INFO L140 encePairwiseOnDemand]: 92/105 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2023-11-17 11:36:49,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 132 flow [2023-11-17 11:36:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-17 11:36:49,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2023-11-17 11:36:49,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-17 11:36:49,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-17 11:36:49,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:49,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-17 11:36:49,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:49,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:49,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:49,809 INFO L175 Difference]: Start difference. First operand has 26 places, 33 transitions, 70 flow. Second operand 3 states and 123 transitions. [2023-11-17 11:36:49,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 132 flow [2023-11-17 11:36:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:49,814 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 46 flow [2023-11-17 11:36:49,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2023-11-17 11:36:49,818 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-11-17 11:36:49,819 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 46 flow [2023-11-17 11:36:49,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:49,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:49,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:36:49,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:36:49,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:49,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1312290786, now seen corresponding path program 1 times [2023-11-17 11:36:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:49,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343406745] [2023-11-17 11:36:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:49,866 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:49,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:49,896 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:49,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:36:49,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:36:49,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:36:49,900 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:36:49,902 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:49,902 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:36:49,922 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:36:49,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 83 transitions, 182 flow [2023-11-17 11:36:49,951 INFO L124 PetriNetUnfolderBase]: 33/148 cut-off events. [2023-11-17 11:36:49,952 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:36:49,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 148 events. 33/148 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 617 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 91. Up to 9 conditions per place. [2023-11-17 11:36:49,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 83 transitions, 182 flow [2023-11-17 11:36:49,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 83 transitions, 182 flow [2023-11-17 11:36:49,955 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:49,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 83 transitions, 182 flow [2023-11-17 11:36:49,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 83 transitions, 182 flow [2023-11-17 11:36:49,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 83 transitions, 182 flow [2023-11-17 11:36:49,970 INFO L124 PetriNetUnfolderBase]: 33/148 cut-off events. [2023-11-17 11:36:49,970 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:36:49,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 148 events. 33/148 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 617 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 91. Up to 9 conditions per place. [2023-11-17 11:36:49,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 4140 [2023-11-17 11:36:51,095 INFO L134 LiptonReduction]: Checked pairs total: 9284 [2023-11-17 11:36:51,095 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-11-17 11:36:51,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:36:51,098 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;@5940f8bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:36:51,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:36:51,101 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:36:51,101 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2023-11-17 11:36:51,101 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:51,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:51,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:36:51,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:51,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 16179792, now seen corresponding path program 1 times [2023-11-17 11:36:51,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:51,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834808392] [2023-11-17 11:36:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:51,161 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 11:36:51,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834808392] [2023-11-17 11:36:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834808392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:51,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:36:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455896016] [2023-11-17 11:36:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:51,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:51,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 145 [2023-11-17 11:36:51,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 52 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:51,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 145 [2023-11-17 11:36:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:51,447 INFO L124 PetriNetUnfolderBase]: 1884/3106 cut-off events. [2023-11-17 11:36:51,447 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:36:51,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6174 conditions, 3106 events. 1884/3106 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16680 event pairs, 824 based on Foata normal form. 233/2942 useless extension candidates. Maximal degree in co-relation 641. Up to 3005 conditions per place. [2023-11-17 11:36:51,461 INFO L140 encePairwiseOnDemand]: 126/145 looper letters, 32 selfloop transitions, 2 changer transitions 10/47 dead transitions. [2023-11-17 11:36:51,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 198 flow [2023-11-17 11:36:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-11-17 11:36:51,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816091954022989 [2023-11-17 11:36:51,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-11-17 11:36:51,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-11-17 11:36:51,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:51,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-11-17 11:36:51,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,467 INFO L175 Difference]: Start difference. First operand has 39 places, 52 transitions, 120 flow. Second operand 3 states and 166 transitions. [2023-11-17 11:36:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 198 flow [2023-11-17 11:36:51,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:51,469 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 76 flow [2023-11-17 11:36:51,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-17 11:36:51,470 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-11-17 11:36:51,470 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 76 flow [2023-11-17 11:36:51,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:51,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:36:51,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:51,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1252279114, now seen corresponding path program 1 times [2023-11-17 11:36:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:51,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131898001] [2023-11-17 11:36:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:51,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:51,559 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 11:36:51,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:51,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131898001] [2023-11-17 11:36:51,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131898001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:51,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:36:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672464687] [2023-11-17 11:36:51,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:51,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:51,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 145 [2023-11-17 11:36:51,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:51,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 145 [2023-11-17 11:36:51,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:51,714 INFO L124 PetriNetUnfolderBase]: 811/1356 cut-off events. [2023-11-17 11:36:51,715 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-17 11:36:51,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 1356 events. 811/1356 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6117 event pairs, 313 based on Foata normal form. 12/1364 useless extension candidates. Maximal degree in co-relation 2854. Up to 1218 conditions per place. [2023-11-17 11:36:51,723 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 34 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-11-17 11:36:51,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 186 flow [2023-11-17 11:36:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-17 11:36:51,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103448275862069 [2023-11-17 11:36:51,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-17 11:36:51,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-17 11:36:51,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:51,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-17 11:36:51,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,733 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 76 flow. Second operand 3 states and 135 transitions. [2023-11-17 11:36:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 186 flow [2023-11-17 11:36:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:51,735 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 93 flow [2023-11-17 11:36:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-11-17 11:36:51,738 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-17 11:36:51,738 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 93 flow [2023-11-17 11:36:51,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:51,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:51,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:36:51,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:36:51,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:51,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 719780951, now seen corresponding path program 1 times [2023-11-17 11:36:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:51,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371069819] [2023-11-17 11:36:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:51,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:51,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:51,787 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:51,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:36:51,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:36:51,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:36:51,788 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:36:51,789 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:51,789 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:36:51,813 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:36:51,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 108 transitions, 243 flow [2023-11-17 11:36:51,832 INFO L124 PetriNetUnfolderBase]: 50/220 cut-off events. [2023-11-17 11:36:51,832 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:36:51,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 220 events. 50/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 976 event pairs, 1 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2023-11-17 11:36:51,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 108 transitions, 243 flow [2023-11-17 11:36:51,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 108 transitions, 243 flow [2023-11-17 11:36:51,836 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:51,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 108 transitions, 243 flow [2023-11-17 11:36:51,836 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 108 transitions, 243 flow [2023-11-17 11:36:51,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 108 transitions, 243 flow [2023-11-17 11:36:51,853 INFO L124 PetriNetUnfolderBase]: 50/220 cut-off events. [2023-11-17 11:36:51,853 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:36:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 220 events. 50/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 976 event pairs, 1 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2023-11-17 11:36:51,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 8004 [2023-11-17 11:36:53,093 INFO L134 LiptonReduction]: Checked pairs total: 18901 [2023-11-17 11:36:53,093 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-11-17 11:36:53,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:36:53,096 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;@5940f8bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:36:53,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:36:53,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:36:53,098 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2023-11-17 11:36:53,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:53,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:53,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:36:53,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:53,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 21456362, now seen corresponding path program 1 times [2023-11-17 11:36:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071505088] [2023-11-17 11:36:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:53,127 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 11:36:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071505088] [2023-11-17 11:36:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071505088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:53,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:53,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:36:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313549336] [2023-11-17 11:36:53,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:53,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:53,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:53,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 190 [2023-11-17 11:36:53,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 69 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:53,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:53,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 190 [2023-11-17 11:36:53,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:56,090 INFO L124 PetriNetUnfolderBase]: 26730/37609 cut-off events. [2023-11-17 11:36:56,091 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2023-11-17 11:36:56,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75641 conditions, 37609 events. 26730/37609 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 221051 event pairs, 24657 based on Foata normal form. 3315/37355 useless extension candidates. Maximal degree in co-relation 29464. Up to 37364 conditions per place. [2023-11-17 11:36:56,259 INFO L140 encePairwiseOnDemand]: 165/190 looper letters, 41 selfloop transitions, 2 changer transitions 11/58 dead transitions. [2023-11-17 11:36:56,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 251 flow [2023-11-17 11:36:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-17 11:36:56,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36140350877192984 [2023-11-17 11:36:56,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-17 11:36:56,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-17 11:36:56,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:56,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-17 11:36:56,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:56,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:56,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:56,266 INFO L175 Difference]: Start difference. First operand has 51 places, 69 transitions, 165 flow. Second operand 3 states and 206 transitions. [2023-11-17 11:36:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 251 flow [2023-11-17 11:36:56,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:56,272 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 104 flow [2023-11-17 11:36:56,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-11-17 11:36:56,275 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-11-17 11:36:56,275 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 104 flow [2023-11-17 11:36:56,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:56,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:56,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:56,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:36:56,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:56,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1735413275, now seen corresponding path program 1 times [2023-11-17 11:36:56,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:56,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118114561] [2023-11-17 11:36:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:56,350 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 11:36:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118114561] [2023-11-17 11:36:56,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118114561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:56,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:56,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:36:56,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408837565] [2023-11-17 11:36:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:56,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:56,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:56,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 190 [2023-11-17 11:36:56,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:56,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:56,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 190 [2023-11-17 11:36:56,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:57,615 INFO L124 PetriNetUnfolderBase]: 11746/16683 cut-off events. [2023-11-17 11:36:57,615 INFO L125 PetriNetUnfolderBase]: For 2117/2117 co-relation queries the response was YES. [2023-11-17 11:36:57,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35314 conditions, 16683 events. 11746/16683 cut-off events. For 2117/2117 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 90590 event pairs, 5236 based on Foata normal form. 39/16713 useless extension candidates. Maximal degree in co-relation 35245. Up to 16113 conditions per place. [2023-11-17 11:36:57,710 INFO L140 encePairwiseOnDemand]: 185/190 looper letters, 46 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-11-17 11:36:57,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 255 flow [2023-11-17 11:36:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-17 11:36:57,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3017543859649123 [2023-11-17 11:36:57,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-17 11:36:57,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-17 11:36:57,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:57,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-17 11:36:57,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:57,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:57,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:57,714 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 104 flow. Second operand 3 states and 172 transitions. [2023-11-17 11:36:57,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 255 flow [2023-11-17 11:36:57,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 248 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:57,719 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 126 flow [2023-11-17 11:36:57,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-17 11:36:57,721 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-11-17 11:36:57,721 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 126 flow [2023-11-17 11:36:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:57,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:57,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:57,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:36:57,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:57,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:57,723 INFO L85 PathProgramCache]: Analyzing trace with hash -350710769, now seen corresponding path program 1 times [2023-11-17 11:36:57,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:57,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815113] [2023-11-17 11:36:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:57,812 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 11:36:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815113] [2023-11-17 11:36:57,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:36:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543440754] [2023-11-17 11:36:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:36:57,817 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 11:36:57,843 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 11:36:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:57,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:36:57,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:36:57,974 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 11:36:57,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:36:58,011 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 11:36:58,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543440754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:36:58,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:36:58,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:36:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413942296] [2023-11-17 11:36:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:36:58,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:36:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:36:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:36:58,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 190 [2023-11-17 11:36:58,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 126 flow. Second operand has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:58,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:58,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 190 [2023-11-17 11:36:58,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:58,616 INFO L124 PetriNetUnfolderBase]: 5560/8779 cut-off events. [2023-11-17 11:36:58,616 INFO L125 PetriNetUnfolderBase]: For 3976/3976 co-relation queries the response was YES. [2023-11-17 11:36:58,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18787 conditions, 8779 events. 5560/8779 cut-off events. For 3976/3976 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 54378 event pairs, 676 based on Foata normal form. 819/9594 useless extension candidates. Maximal degree in co-relation 15867. Up to 5346 conditions per place. [2023-11-17 11:36:58,669 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 87 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-11-17 11:36:58,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 95 transitions, 442 flow [2023-11-17 11:36:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:36:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:36:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 332 transitions. [2023-11-17 11:36:58,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2912280701754386 [2023-11-17 11:36:58,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 332 transitions. [2023-11-17 11:36:58,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 332 transitions. [2023-11-17 11:36:58,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:58,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 332 transitions. [2023-11-17 11:36:58,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:58,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:58,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:58,675 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 126 flow. Second operand 6 states and 332 transitions. [2023-11-17 11:36:58,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 95 transitions, 442 flow [2023-11-17 11:36:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 95 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:58,685 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 124 flow [2023-11-17 11:36:58,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-11-17 11:36:58,685 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-11-17 11:36:58,685 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 124 flow [2023-11-17 11:36:58,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:58,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:58,686 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:36:58,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:36:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:58,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:58,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1000773629, now seen corresponding path program 1 times [2023-11-17 11:36:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654552028] [2023-11-17 11:36:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:58,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:58,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:58,922 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:58,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:36:58,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:36:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:36:58,924 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:36:58,924 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:58,924 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:36:58,945 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:36:58,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 133 transitions, 306 flow [2023-11-17 11:36:58,967 INFO L124 PetriNetUnfolderBase]: 75/316 cut-off events. [2023-11-17 11:36:58,968 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:36:58,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 316 events. 75/316 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1454 event pairs, 6 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 244. Up to 32 conditions per place. [2023-11-17 11:36:58,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 133 transitions, 306 flow [2023-11-17 11:36:58,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 133 transitions, 306 flow [2023-11-17 11:36:58,972 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:58,972 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 133 transitions, 306 flow [2023-11-17 11:36:58,972 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 133 transitions, 306 flow [2023-11-17 11:36:58,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 133 transitions, 306 flow [2023-11-17 11:36:58,992 INFO L124 PetriNetUnfolderBase]: 75/316 cut-off events. [2023-11-17 11:36:58,993 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:36:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 316 events. 75/316 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1454 event pairs, 6 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 244. Up to 32 conditions per place. [2023-11-17 11:36:59,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 13064 [2023-11-17 11:37:00,701 INFO L134 LiptonReduction]: Checked pairs total: 31258 [2023-11-17 11:37:00,701 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-11-17 11:37:00,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:37:00,704 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;@5940f8bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:37:00,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:37:00,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:37:00,706 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2023-11-17 11:37:00,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:37:00,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:37:00,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:37:00,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:37:00,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:37:00,707 INFO L85 PathProgramCache]: Analyzing trace with hash 28113401, now seen corresponding path program 1 times [2023-11-17 11:37:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:37:00,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109834313] [2023-11-17 11:37:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:37:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:37:00,739 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 11:37:00,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:37:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109834313] [2023-11-17 11:37:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109834313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:37:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:37:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:37:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298493136] [2023-11-17 11:37:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:37:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:37:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:37:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:37:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:37:00,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 230 [2023-11-17 11:37:00,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 86 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:00,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:37:00,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 230 [2023-11-17 11:37:00,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:37:28,614 INFO L124 PetriNetUnfolderBase]: 335688/437833 cut-off events. [2023-11-17 11:37:28,614 INFO L125 PetriNetUnfolderBase]: For 15874/15874 co-relation queries the response was YES. [2023-11-17 11:37:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881386 conditions, 437833 events. 335688/437833 cut-off events. For 15874/15874 co-relation queries the response was YES. Maximal size of possible extension queue 7932. Compared 2819319 event pairs, 316541 based on Foata normal form. 41686/446295 useless extension candidates. Maximal degree in co-relation 79658. Up to 435539 conditions per place. [2023-11-17 11:37:30,234 INFO L140 encePairwiseOnDemand]: 199/230 looper letters, 50 selfloop transitions, 2 changer transitions 12/69 dead transitions. [2023-11-17 11:37:30,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 306 flow [2023-11-17 11:37:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:37:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:37:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-17 11:37:30,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3565217391304348 [2023-11-17 11:37:30,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-17 11:37:30,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-17 11:37:30,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:37:30,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-17 11:37:30,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:30,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:30,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:30,239 INFO L175 Difference]: Start difference. First operand has 63 places, 86 transitions, 212 flow. Second operand 3 states and 246 transitions. [2023-11-17 11:37:30,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 306 flow [2023-11-17 11:37:30,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:37:30,246 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 134 flow [2023-11-17 11:37:30,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-11-17 11:37:30,246 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-17 11:37:30,247 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 134 flow [2023-11-17 11:37:30,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:30,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:37:30,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:37:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:37:30,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:37:30,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:37:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2108894974, now seen corresponding path program 1 times [2023-11-17 11:37:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:37:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767811296] [2023-11-17 11:37:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:37:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:37:30,290 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 11:37:30,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:37:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767811296] [2023-11-17 11:37:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767811296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:37:30,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:37:30,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:37:30,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707944858] [2023-11-17 11:37:30,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:37:30,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:37:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:37:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:37:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:37:30,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 230 [2023-11-17 11:37:30,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:30,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:37:30,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 230 [2023-11-17 11:37:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:37:41,920 INFO L124 PetriNetUnfolderBase]: 145558/189931 cut-off events. [2023-11-17 11:37:41,920 INFO L125 PetriNetUnfolderBase]: For 22568/22568 co-relation queries the response was YES. [2023-11-17 11:37:42,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398427 conditions, 189931 events. 145558/189931 cut-off events. For 22568/22568 co-relation queries the response was YES. Maximal size of possible extension queue 3800. Compared 1138015 event pairs, 72898 based on Foata normal form. 120/190002 useless extension candidates. Maximal degree in co-relation 308039. Up to 187779 conditions per place. [2023-11-17 11:37:42,911 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 58 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-11-17 11:37:42,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 328 flow [2023-11-17 11:37:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:37:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:37:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2023-11-17 11:37:42,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30289855072463767 [2023-11-17 11:37:42,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2023-11-17 11:37:42,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2023-11-17 11:37:42,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:37:42,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2023-11-17 11:37:42,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:42,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:42,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:42,915 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 134 flow. Second operand 3 states and 209 transitions. [2023-11-17 11:37:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 328 flow [2023-11-17 11:37:42,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 313 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:37:42,933 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 159 flow [2023-11-17 11:37:42,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-17 11:37:42,934 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-11-17 11:37:42,935 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 159 flow [2023-11-17 11:37:42,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:42,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:37:42,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:37:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:37:42,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:37:42,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:37:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2056723402, now seen corresponding path program 1 times [2023-11-17 11:37:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:37:42,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182196913] [2023-11-17 11:37:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:37:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:37:42,989 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 11:37:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:37:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182196913] [2023-11-17 11:37:42,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182196913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:37:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235101585] [2023-11-17 11:37:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:42,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:37:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:37:42,991 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 11:37:42,995 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 11:37:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:37:43,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:37:43,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:37:43,120 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 11:37:43,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:37:43,152 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 11:37:43,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235101585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:37:43,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:37:43,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:37:43,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034351972] [2023-11-17 11:37:43,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:37:43,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:37:43,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:37:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:37:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:37:43,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 230 [2023-11-17 11:37:43,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 52.285714285714285) internal successors, (366), 7 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:43,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:37:43,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 230 [2023-11-17 11:37:43,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:37:53,686 INFO L124 PetriNetUnfolderBase]: 139372/183388 cut-off events. [2023-11-17 11:37:53,687 INFO L125 PetriNetUnfolderBase]: For 25095/25095 co-relation queries the response was YES. [2023-11-17 11:37:54,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406211 conditions, 183388 events. 139372/183388 cut-off events. For 25095/25095 co-relation queries the response was YES. Maximal size of possible extension queue 3831. Compared 1167366 event pairs, 5896 based on Foata normal form. 819/184206 useless extension candidates. Maximal degree in co-relation 314470. Up to 119152 conditions per place. [2023-11-17 11:37:54,648 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 136 selfloop transitions, 6 changer transitions 0/147 dead transitions. [2023-11-17 11:37:54,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 147 transitions, 685 flow [2023-11-17 11:37:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:37:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:37:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2023-11-17 11:37:54,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30869565217391304 [2023-11-17 11:37:54,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2023-11-17 11:37:54,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2023-11-17 11:37:54,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:37:54,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2023-11-17 11:37:54,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:54,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:54,657 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:54,657 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 159 flow. Second operand 6 states and 426 transitions. [2023-11-17 11:37:54,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 147 transitions, 685 flow [2023-11-17 11:37:54,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 147 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:37:54,689 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 194 flow [2023-11-17 11:37:54,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-17 11:37:54,690 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-11-17 11:37:54,691 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 194 flow [2023-11-17 11:37:54,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.285714285714285) internal successors, (366), 7 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:54,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:37:54,692 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:37:54,696 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 11:37:54,892 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,SelfDestructingSolverStorable11 [2023-11-17 11:37:54,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:37:54,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:37:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1855274683, now seen corresponding path program 1 times [2023-11-17 11:37:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:37:54,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322822984] [2023-11-17 11:37:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:54,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:37:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:37:54,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:37:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:37:54,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:37:54,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:37:54,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:37:54,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:37:54,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:37:54,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:37:54,933 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:37:54,934 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:37:54,966 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:37:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 158 transitions, 371 flow [2023-11-17 11:37:55,007 INFO L124 PetriNetUnfolderBase]: 120/464 cut-off events. [2023-11-17 11:37:55,007 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:37:55,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 464 events. 120/464 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2251 event pairs, 23 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 366. Up to 80 conditions per place. [2023-11-17 11:37:55,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 158 transitions, 371 flow [2023-11-17 11:37:55,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 158 transitions, 371 flow [2023-11-17 11:37:55,015 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:37:55,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 158 transitions, 371 flow [2023-11-17 11:37:55,016 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 158 transitions, 371 flow [2023-11-17 11:37:55,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 158 transitions, 371 flow [2023-11-17 11:37:55,050 INFO L124 PetriNetUnfolderBase]: 120/464 cut-off events. [2023-11-17 11:37:55,050 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:37:55,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 464 events. 120/464 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2251 event pairs, 23 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 366. Up to 80 conditions per place. [2023-11-17 11:37:55,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 19320 [2023-11-17 11:37:57,197 INFO L134 LiptonReduction]: Checked pairs total: 47132 [2023-11-17 11:37:57,197 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-17 11:37:57,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:37:57,199 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;@5940f8bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:37:57,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:37:57,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:37:57,201 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2023-11-17 11:37:57,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:37:57,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:37:57,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:37:57,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:37:57,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:37:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash 36005646, now seen corresponding path program 1 times [2023-11-17 11:37:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:37:57,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191337774] [2023-11-17 11:37:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:37:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:37:57,223 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 11:37:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:37:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191337774] [2023-11-17 11:37:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191337774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:37:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:37:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:37:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371586455] [2023-11-17 11:37:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:37:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:37:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:37:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:37:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:37:57,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 274 [2023-11-17 11:37:57,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 103 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:57,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:37:57,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 274 [2023-11-17 11:37:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand