/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:36:47,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:36:48,022 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:36:48,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:36:48,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:36:48,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:36:48,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:36:48,065 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:36:48,065 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:36:48,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:36:48,069 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:36:48,069 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:36:48,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:36:48,070 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:36:48,070 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:36:48,071 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:36:48,071 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:36:48,071 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:36:48,071 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:36:48,071 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:36:48,072 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:36:48,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:36:48,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:36:48,073 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:36:48,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:36:48,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:48,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:36:48,073 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:36:48,074 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:36:48,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:36:48,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:36:48,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:36:48,075 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:36:48,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:36:48,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:36:48,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:36:48,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:36:48,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:36:48,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-17 15:36:49,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:36:49,840 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:36:49,840 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-17 15:36:49,858 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef4b6abc1/ac0f2d6b1df74d1f8c72631697188a4e/FLAGac8901d90 [2023-11-17 15:36:49,870 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef4b6abc1/ac0f2d6b1df74d1f8c72631697188a4e [2023-11-17 15:36:49,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:36:49,873 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:36:49,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:49,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:36:49,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:36:49,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:49" (1/1) ... [2023-11-17 15:36:49,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a69571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:49, skipping insertion in model container [2023-11-17 15:36:49,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:49" (1/1) ... [2023-11-17 15:36:49,935 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:36:50,196 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_21-deref_read_racing.i[30176,30189] [2023-11-17 15:36:50,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:50,226 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:36:50,252 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_21-deref_read_racing.i[30176,30189] [2023-11-17 15:36:50,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:50,296 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:36:50,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50 WrapperNode [2023-11-17 15:36:50,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:50,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:50,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:36:50,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:36:50,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,333 INFO L138 Inliner]: procedures = 171, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-11-17 15:36:50,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:50,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:36:50,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:36:50,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:36:50,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:36:50,382 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:36:50,382 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:36:50,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:36:50,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (1/1) ... [2023-11-17 15:36:50,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:50,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:36:50,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:36:50,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:36:50,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:36:50,440 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:36:50,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:36:50,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:36:50,440 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:36:50,440 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:36:50,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:36:50,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:36:50,441 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:36:50,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:36:50,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:36:50,442 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:36:50,555 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:36:50,558 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:36:50,778 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:36:50,816 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:36:50,817 INFO L307 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-17 15:36:50,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:50 BoogieIcfgContainer [2023-11-17 15:36:50,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:36:50,821 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:36:50,821 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:36:50,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:36:50,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:49" (1/3) ... [2023-11-17 15:36:50,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378bb944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:50, skipping insertion in model container [2023-11-17 15:36:50,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:50" (2/3) ... [2023-11-17 15:36:50,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378bb944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:50, skipping insertion in model container [2023-11-17 15:36:50,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:50" (3/3) ... [2023-11-17 15:36:50,826 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-11-17 15:36:50,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:36:50,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:36:50,840 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:36:50,881 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:36:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 104 transitions, 212 flow [2023-11-17 15:36:50,973 INFO L124 PetriNetUnfolderBase]: 14/137 cut-off events. [2023-11-17 15:36:50,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:50,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 137 events. 14/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 322 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-11-17 15:36:50,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 104 transitions, 212 flow [2023-11-17 15:36:50,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 104 transitions, 212 flow [2023-11-17 15:36:50,988 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:51,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 104 transitions, 212 flow [2023-11-17 15:36:51,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 104 transitions, 212 flow [2023-11-17 15:36:51,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 104 transitions, 212 flow [2023-11-17 15:36:51,036 INFO L124 PetriNetUnfolderBase]: 14/137 cut-off events. [2023-11-17 15:36:51,036 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 137 events. 14/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 322 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-11-17 15:36:51,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 2730 [2023-11-17 15:36:53,822 INFO L134 LiptonReduction]: Checked pairs total: 4397 [2023-11-17 15:36:53,823 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-11-17 15:36:53,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:53,842 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;@c21c72e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:53,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:53,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:53,845 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:36:53,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:53,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:53,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:53,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:53,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 13818404, now seen corresponding path program 1 times [2023-11-17 15:36:53,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:53,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877770249] [2023-11-17 15:36:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:54,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:54,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877770249] [2023-11-17 15:36:54,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877770249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:54,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:54,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:54,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065764835] [2023-11-17 15:36:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:54,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:54,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 205 [2023-11-17 15:36:54,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:54,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:54,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 205 [2023-11-17 15:36:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:54,256 INFO L124 PetriNetUnfolderBase]: 70/172 cut-off events. [2023-11-17 15:36:54,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:54,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 172 events. 70/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 681 event pairs, 0 based on Foata normal form. 8/158 useless extension candidates. Maximal degree in co-relation 315. Up to 148 conditions per place. [2023-11-17 15:36:54,259 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 26 selfloop transitions, 2 changer transitions 2/32 dead transitions. [2023-11-17 15:36:54,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 128 flow [2023-11-17 15:36:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-17 15:36:54,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2023-11-17 15:36:54,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-17 15:36:54,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-17 15:36:54,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:54,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-17 15:36:54,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:54,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:54,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:54,285 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 62 flow. Second operand 3 states and 270 transitions. [2023-11-17 15:36:54,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 128 flow [2023-11-17 15:36:54,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:54,289 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 50 flow [2023-11-17 15:36:54,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-11-17 15:36:54,294 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-11-17 15:36:54,294 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 50 flow [2023-11-17 15:36:54,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:54,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:54,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:36:54,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:36:54,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:54,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash 386755624, now seen corresponding path program 1 times [2023-11-17 15:36:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:54,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776656776] [2023-11-17 15:36:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:54,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:54,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:54,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:54,358 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:54,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:54,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:54,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:36:54,362 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:54,364 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:54,364 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:36:54,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:36:54,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 140 transitions, 290 flow [2023-11-17 15:36:54,419 INFO L124 PetriNetUnfolderBase]: 24/211 cut-off events. [2023-11-17 15:36:54,419 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:36:54,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 211 events. 24/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 619 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2023-11-17 15:36:54,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 140 transitions, 290 flow [2023-11-17 15:36:54,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 140 transitions, 290 flow [2023-11-17 15:36:54,426 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:54,426 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 140 transitions, 290 flow [2023-11-17 15:36:54,427 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 140 transitions, 290 flow [2023-11-17 15:36:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 140 transitions, 290 flow [2023-11-17 15:36:54,448 INFO L124 PetriNetUnfolderBase]: 24/211 cut-off events. [2023-11-17 15:36:54,448 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:36:54,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 211 events. 24/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 619 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2023-11-17 15:36:54,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 7980 [2023-11-17 15:36:57,301 INFO L134 LiptonReduction]: Checked pairs total: 14181 [2023-11-17 15:36:57,301 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-11-17 15:36:57,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:57,305 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;@c21c72e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:57,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:57,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:57,307 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:36:57,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:57,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:57,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:57,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:57,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:57,308 INFO L85 PathProgramCache]: Analyzing trace with hash 23263262, now seen corresponding path program 1 times [2023-11-17 15:36:57,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:57,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243971559] [2023-11-17 15:36:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:57,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:57,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243971559] [2023-11-17 15:36:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243971559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:57,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182349120] [2023-11-17 15:36:57,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:57,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:57,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 271 [2023-11-17 15:36:57,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:57,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:57,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 271 [2023-11-17 15:36:57,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:57,641 INFO L124 PetriNetUnfolderBase]: 1720/2857 cut-off events. [2023-11-17 15:36:57,641 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-17 15:36:57,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5674 conditions, 2857 events. 1720/2857 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 14965 event pairs, 770 based on Foata normal form. 184/2755 useless extension candidates. Maximal degree in co-relation 497. Up to 2766 conditions per place. [2023-11-17 15:36:57,657 INFO L140 encePairwiseOnDemand]: 254/271 looper letters, 38 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-11-17 15:36:57,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 186 flow [2023-11-17 15:36:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-11-17 15:36:57,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43911439114391143 [2023-11-17 15:36:57,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-11-17 15:36:57,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-11-17 15:36:57,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:57,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-11-17 15:36:57,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:57,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:57,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:57,669 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 106 flow. Second operand 3 states and 357 transitions. [2023-11-17 15:36:57,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 186 flow [2023-11-17 15:36:57,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:57,671 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 86 flow [2023-11-17 15:36:57,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-17 15:36:57,672 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-11-17 15:36:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 86 flow [2023-11-17 15:36:57,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:57,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:57,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:57,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:36:57,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:57,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1436995166, now seen corresponding path program 1 times [2023-11-17 15:36:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:57,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460052032] [2023-11-17 15:36:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:57,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:57,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:57,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460052032] [2023-11-17 15:36:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460052032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262439484] [2023-11-17 15:36:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:57,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:57,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:36:57,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:36:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:57,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:57,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:57,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:57,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262439484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:57,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:57,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:57,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362361805] [2023-11-17 15:36:57,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:57,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:57,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:57,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 271 [2023-11-17 15:36:57,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 100.28571428571429) internal successors, (702), 7 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:57,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:57,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 271 [2023-11-17 15:36:57,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:58,156 INFO L124 PetriNetUnfolderBase]: 570/1113 cut-off events. [2023-11-17 15:36:58,156 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-11-17 15:36:58,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2266 conditions, 1113 events. 570/1113 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5745 event pairs, 0 based on Foata normal form. 132/1245 useless extension candidates. Maximal degree in co-relation 206. Up to 682 conditions per place. [2023-11-17 15:36:58,164 INFO L140 encePairwiseOnDemand]: 268/271 looper letters, 55 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-11-17 15:36:58,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 258 flow [2023-11-17 15:36:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:36:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:36:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 550 transitions. [2023-11-17 15:36:58,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059040590405904 [2023-11-17 15:36:58,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 550 transitions. [2023-11-17 15:36:58,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 550 transitions. [2023-11-17 15:36:58,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:58,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 550 transitions. [2023-11-17 15:36:58,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:58,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:58,171 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:58,171 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 86 flow. Second operand 5 states and 550 transitions. [2023-11-17 15:36:58,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 258 flow [2023-11-17 15:36:58,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:36:58,175 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:36:58,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:36:58,176 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-11-17 15:36:58,176 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:36:58,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.28571428571429) internal successors, (702), 7 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:58,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:58,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:36:58,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:36:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:58,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:58,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1193503909, now seen corresponding path program 1 times [2023-11-17 15:36:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719806716] [2023-11-17 15:36:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:58,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:58,419 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:58,420 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:58,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:58,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:58,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:36:58,420 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:58,421 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:58,421 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:36:58,438 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:36:58,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 176 transitions, 370 flow [2023-11-17 15:36:58,465 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-11-17 15:36:58,465 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:36:58,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 285 events. 34/285 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 908 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-11-17 15:36:58,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 176 transitions, 370 flow [2023-11-17 15:36:58,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 176 transitions, 370 flow [2023-11-17 15:36:58,469 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:58,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 176 transitions, 370 flow [2023-11-17 15:36:58,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 176 transitions, 370 flow [2023-11-17 15:36:58,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 176 transitions, 370 flow [2023-11-17 15:36:58,493 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-11-17 15:36:58,494 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:36:58,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 285 events. 34/285 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 908 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-11-17 15:36:58,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 15750 [2023-11-17 15:37:01,861 INFO L134 LiptonReduction]: Checked pairs total: 28869 [2023-11-17 15:37:01,862 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-11-17 15:37:01,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:01,864 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;@c21c72e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:01,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:01,867 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:01,867 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-17 15:37:01,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:01,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:01,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:01,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:01,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 34646886, now seen corresponding path program 1 times [2023-11-17 15:37:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:01,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894038166] [2023-11-17 15:37:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:01,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894038166] [2023-11-17 15:37:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894038166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:01,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:01,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377172729] [2023-11-17 15:37:01,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:01,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 335 [2023-11-17 15:37:01,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 67 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:01,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:01,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 335 [2023-11-17 15:37:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:04,858 INFO L124 PetriNetUnfolderBase]: 26943/38519 cut-off events. [2023-11-17 15:37:04,858 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2023-11-17 15:37:04,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76724 conditions, 38519 events. 26943/38519 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 236128 event pairs, 17193 based on Foata normal form. 2912/38549 useless extension candidates. Maximal degree in co-relation 5659. Up to 37669 conditions per place. [2023-11-17 15:37:05,057 INFO L140 encePairwiseOnDemand]: 311/335 looper letters, 48 selfloop transitions, 2 changer transitions 2/58 dead transitions. [2023-11-17 15:37:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 238 flow [2023-11-17 15:37:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-11-17 15:37:05,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407960199004975 [2023-11-17 15:37:05,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-11-17 15:37:05,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-11-17 15:37:05,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:05,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-11-17 15:37:05,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:05,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:05,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:05,065 INFO L175 Difference]: Start difference. First operand has 53 places, 67 transitions, 152 flow. Second operand 3 states and 443 transitions. [2023-11-17 15:37:05,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 238 flow [2023-11-17 15:37:05,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 236 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:05,070 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 116 flow [2023-11-17 15:37:05,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-17 15:37:05,073 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-11-17 15:37:05,073 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 116 flow [2023-11-17 15:37:05,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:05,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:05,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:05,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:37:05,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:05,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:05,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1333967923, now seen corresponding path program 1 times [2023-11-17 15:37:05,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:05,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669323823] [2023-11-17 15:37:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:05,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:05,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:05,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669323823] [2023-11-17 15:37:05,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669323823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:05,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808849051] [2023-11-17 15:37:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:05,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:05,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:05,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:37:05,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:37:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:05,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:05,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:05,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808849051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:05,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:05,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924194693] [2023-11-17 15:37:05,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:05,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 335 [2023-11-17 15:37:05,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:05,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:05,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 335 [2023-11-17 15:37:05,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:06,433 INFO L124 PetriNetUnfolderBase]: 9348/14973 cut-off events. [2023-11-17 15:37:06,434 INFO L125 PetriNetUnfolderBase]: For 5104/5104 co-relation queries the response was YES. [2023-11-17 15:37:06,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30108 conditions, 14973 events. 9348/14973 cut-off events. For 5104/5104 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 99568 event pairs, 0 based on Foata normal form. 1342/16315 useless extension candidates. Maximal degree in co-relation 2797. Up to 8998 conditions per place. [2023-11-17 15:37:06,510 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 95 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2023-11-17 15:37:06,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 105 transitions, 434 flow [2023-11-17 15:37:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-11-17 15:37:06,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41194029850746267 [2023-11-17 15:37:06,513 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-11-17 15:37:06,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-11-17 15:37:06,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:06,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-11-17 15:37:06,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:06,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:06,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:06,519 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 116 flow. Second operand 6 states and 828 transitions. [2023-11-17 15:37:06,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 105 transitions, 434 flow [2023-11-17 15:37:06,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 105 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:37:06,533 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:37:06,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:37:06,536 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-11-17 15:37:06,540 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:37:06,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:06,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:06,541 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:37:06,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 15:37:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 15:37:06,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:06,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1633563759, now seen corresponding path program 1 times [2023-11-17 15:37:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:06,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920449784] [2023-11-17 15:37:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:06,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:06,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:06,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:06,782 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:06,782 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:06,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:37:06,783 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:06,783 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:06,783 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:37:06,802 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:37:06,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 212 transitions, 452 flow [2023-11-17 15:37:06,844 INFO L124 PetriNetUnfolderBase]: 44/359 cut-off events. [2023-11-17 15:37:06,844 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:37:06,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 359 events. 44/359 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1222 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 293. Up to 10 conditions per place. [2023-11-17 15:37:06,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 212 transitions, 452 flow [2023-11-17 15:37:06,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 212 transitions, 452 flow [2023-11-17 15:37:06,850 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:06,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 212 transitions, 452 flow [2023-11-17 15:37:06,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 212 transitions, 452 flow [2023-11-17 15:37:06,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 212 transitions, 452 flow [2023-11-17 15:37:06,888 INFO L124 PetriNetUnfolderBase]: 44/359 cut-off events. [2023-11-17 15:37:06,888 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:37:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 359 events. 44/359 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1222 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 293. Up to 10 conditions per place. [2023-11-17 15:37:06,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 26040 [2023-11-17 15:37:10,571 INFO L134 LiptonReduction]: Checked pairs total: 50670 [2023-11-17 15:37:10,571 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-11-17 15:37:10,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:10,573 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;@c21c72e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:10,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:10,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:10,575 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:37:10,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:10,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:10,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:10,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:10,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 48204303, now seen corresponding path program 1 times [2023-11-17 15:37:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366854535] [2023-11-17 15:37:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:10,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366854535] [2023-11-17 15:37:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366854535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:10,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:10,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:37:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12082828] [2023-11-17 15:37:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:10,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:10,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:10,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 404 [2023-11-17 15:37:10,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:10,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:10,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 404 [2023-11-17 15:37:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:40,478 INFO L124 PetriNetUnfolderBase]: 332105/439820 cut-off events. [2023-11-17 15:37:40,479 INFO L125 PetriNetUnfolderBase]: For 12780/12780 co-relation queries the response was YES. [2023-11-17 15:37:41,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875665 conditions, 439820 events. 332105/439820 cut-off events. For 12780/12780 co-relation queries the response was YES. Maximal size of possible extension queue 8156. Compared 3003456 event pairs, 244130 based on Foata normal form. 37136/450095 useless extension candidates. Maximal degree in co-relation 70019. Up to 429856 conditions per place. [2023-11-17 15:37:42,530 INFO L140 encePairwiseOnDemand]: 375/404 looper letters, 56 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2023-11-17 15:37:42,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 286 flow [2023-11-17 15:37:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-11-17 15:37:42,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43316831683168316 [2023-11-17 15:37:42,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-11-17 15:37:42,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-11-17 15:37:42,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:42,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-11-17 15:37:42,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:42,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:42,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:42,537 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 196 flow. Second operand 3 states and 525 transitions. [2023-11-17 15:37:42,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 286 flow [2023-11-17 15:37:42,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 280 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:42,545 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 146 flow [2023-11-17 15:37:42,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-11-17 15:37:42,546 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-11-17 15:37:42,546 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 146 flow [2023-11-17 15:37:42,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:42,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:42,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:42,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:37:42,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:42,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1446962414, now seen corresponding path program 1 times [2023-11-17 15:37:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:42,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807909684] [2023-11-17 15:37:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:42,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:42,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807909684] [2023-11-17 15:37:42,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807909684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:42,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393997761] [2023-11-17 15:37:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:42,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:42,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:42,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:37:42,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:37:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:42,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:42,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:42,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:42,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393997761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:42,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:42,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149294055] [2023-11-17 15:37:42,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:42,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:42,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:42,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 404 [2023-11-17 15:37:42,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:42,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:42,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 404 [2023-11-17 15:37:42,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:02,742 INFO L124 PetriNetUnfolderBase]: 236765/313380 cut-off events. [2023-11-17 15:38:02,742 INFO L125 PetriNetUnfolderBase]: For 20040/20040 co-relation queries the response was YES. [2023-11-17 15:38:03,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646708 conditions, 313380 events. 236765/313380 cut-off events. For 20040/20040 co-relation queries the response was YES. Maximal size of possible extension queue 6052. Compared 2125438 event pairs, 9900 based on Foata normal form. 1220/314599 useless extension candidates. Maximal degree in co-relation 66057. Up to 202801 conditions per place. [2023-11-17 15:38:04,523 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 141 selfloop transitions, 6 changer transitions 0/156 dead transitions. [2023-11-17 15:38:04,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 156 transitions, 642 flow [2023-11-17 15:38:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:38:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:38:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1014 transitions. [2023-11-17 15:38:04,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183168316831683 [2023-11-17 15:38:04,526 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1014 transitions. [2023-11-17 15:38:04,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1014 transitions. [2023-11-17 15:38:04,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:04,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1014 transitions. [2023-11-17 15:38:04,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:04,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:04,534 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:04,534 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 146 flow. Second operand 6 states and 1014 transitions. [2023-11-17 15:38:04,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 156 transitions, 642 flow [2023-11-17 15:38:04,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 156 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:38:04,601 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 184 flow [2023-11-17 15:38:04,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-11-17 15:38:04,601 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-11-17 15:38:04,601 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 184 flow [2023-11-17 15:38:04,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:04,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:04,602 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:38:04,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 15:38:04,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:38:04,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:04,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash 117073974, now seen corresponding path program 1 times [2023-11-17 15:38:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:04,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233014638] [2023-11-17 15:38:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:04,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:04,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:04,854 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:04,854 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:04,855 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:38:04,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:38:04,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:38:04,855 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:38:04,856 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:04,856 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:38:04,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:38:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 248 transitions, 536 flow [2023-11-17 15:38:04,917 INFO L124 PetriNetUnfolderBase]: 54/433 cut-off events. [2023-11-17 15:38:04,917 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:38:04,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 433 events. 54/433 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1524 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 372. Up to 12 conditions per place. [2023-11-17 15:38:04,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 248 transitions, 536 flow [2023-11-17 15:38:04,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 248 transitions, 536 flow [2023-11-17 15:38:04,923 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:04,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 248 transitions, 536 flow [2023-11-17 15:38:04,923 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 248 transitions, 536 flow [2023-11-17 15:38:04,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 248 transitions, 536 flow [2023-11-17 15:38:05,064 INFO L124 PetriNetUnfolderBase]: 54/433 cut-off events. [2023-11-17 15:38:05,064 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:38:05,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 433 events. 54/433 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1524 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 372. Up to 12 conditions per place. [2023-11-17 15:38:05,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 38850 [2023-11-17 15:38:08,693 INFO L134 LiptonReduction]: Checked pairs total: 74123 [2023-11-17 15:38:08,693 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-11-17 15:38:08,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:08,695 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;@c21c72e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:08,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:38:08,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:08,696 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:38:08,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:08,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:08,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:38:08,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:38:08,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash 63558869, now seen corresponding path program 1 times [2023-11-17 15:38:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:08,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904267832] [2023-11-17 15:38:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:08,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904267832] [2023-11-17 15:38:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904267832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:08,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:08,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:08,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369061400] [2023-11-17 15:38:08,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:08,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:08,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 463 [2023-11-17 15:38:08,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:08,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:08,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 463 [2023-11-17 15:38:08,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand