/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:33:37,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:33:37,301 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-VariableLbe.epf [2023-08-24 12:33:37,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:33:37,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:33:37,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:33:37,339 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:33:37,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:33:37,340 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:33:37,344 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:33:37,344 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:33:37,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:33:37,344 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:33:37,346 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:33:37,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:33:37,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:33:37,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:33:37,346 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:33:37,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:33:37,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:33:37,347 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:33:37,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:33:37,348 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:33:37,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:33:37,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:33:37,349 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:33:37,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:33:37,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:33:37,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:33:37,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:33:37,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:33:37,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:33:37,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:33:37,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:33:37,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:33:37,352 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:33:37,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:33:37,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:33:37,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:33:37,722 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:33:37,723 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:33:37,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-24 12:33:38,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:33:39,235 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:33:39,235 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-24 12:33:39,260 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86901b5c8/0b3c0ce71dad4923a7894e437d783315/FLAG7dce2f936 [2023-08-24 12:33:39,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86901b5c8/0b3c0ce71dad4923a7894e437d783315 [2023-08-24 12:33:39,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:33:39,282 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:33:39,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:33:39,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:33:39,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:33:39,289 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249cc27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39, skipping insertion in model container [2023-08-24 12:33:39,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,337 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:33:39,647 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_01-simple_racing.i[30176,30189] [2023-08-24 12:33:39,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:33:39,679 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:33:39,696 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:33:39,698 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:33:39,707 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_01-simple_racing.i[30176,30189] [2023-08-24 12:33:39,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:33:39,748 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:33:39,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39 WrapperNode [2023-08-24 12:33:39,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:33:39,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:33:39,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:33:39,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:33:39,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,794 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-08-24 12:33:39,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:33:39,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:33:39,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:33:39,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:33:39,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,820 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,829 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:33:39,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:33:39,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:33:39,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:33:39,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (1/1) ... [2023-08-24 12:33:39,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:33:39,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:39,884 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) [2023-08-24 12:33:39,900 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 [2023-08-24 12:33:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:33:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:33:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:33:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:33:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:33:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:33:39,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:33:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:33:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:33:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:33:39,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:33:39,922 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 12:33:40,028 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:33:40,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:33:40,204 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:33:40,210 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:33:40,211 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 12:33:40,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:33:40 BoogieIcfgContainer [2023-08-24 12:33:40,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:33:40,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:33:40,215 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:33:40,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:33:40,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:33:39" (1/3) ... [2023-08-24 12:33:40,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9eb4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:33:40, skipping insertion in model container [2023-08-24 12:33:40,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:33:39" (2/3) ... [2023-08-24 12:33:40,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9eb4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:33:40, skipping insertion in model container [2023-08-24 12:33:40,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:33:40" (3/3) ... [2023-08-24 12:33:40,231 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-08-24 12:33:40,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:33:40,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:33:40,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:33:40,297 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:33:40,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 108 transitions, 224 flow [2023-08-24 12:33:40,431 INFO L124 PetriNetUnfolderBase]: 17/143 cut-off events. [2023-08-24 12:33:40,431 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:33:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 143 events. 17/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 313 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-24 12:33:40,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 108 transitions, 224 flow [2023-08-24 12:33:40,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:40,448 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:40,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:40,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:40,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:40,482 INFO L124 PetriNetUnfolderBase]: 16/138 cut-off events. [2023-08-24 12:33:40,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:40,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 138 events. 16/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 302 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-24 12:33:40,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 2296 [2023-08-24 12:33:43,231 INFO L134 LiptonReduction]: Checked pairs total: 4057 [2023-08-24 12:33:43,231 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-24 12:33:43,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:33:43,247 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:33:43,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:33:43,249 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:33:43,250 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-08-24 12:33:43,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:43,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:43,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:33:43,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:33:43,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash 12787906, now seen corresponding path program 1 times [2023-08-24 12:33:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:43,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877736320] [2023-08-24 12:33:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:43,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:43,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:43,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877736320] [2023-08-24 12:33:43,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877736320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:43,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:43,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:33:43,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920555271] [2023-08-24 12:33:43,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:33:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:33:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:33:43,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 196 [2023-08-24 12:33:43,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:43,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 196 [2023-08-24 12:33:43,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:43,587 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-08-24 12:33:43,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:43,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 712 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-08-24 12:33:43,590 INFO L140 encePairwiseOnDemand]: 184/196 looper letters, 21 selfloop transitions, 2 changer transitions 6/30 dead transitions. [2023-08-24 12:33:43,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 121 flow [2023-08-24 12:33:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:33:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:33:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-24 12:33:43,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2023-08-24 12:33:43,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-24 12:33:43,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-24 12:33:43,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:43,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-24 12:33:43,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,627 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 302 transitions. [2023-08-24 12:33:43,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 121 flow [2023-08-24 12:33:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:33:43,631 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 43 flow [2023-08-24 12:33:43,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=47, 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=43, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2023-08-24 12:33:43,635 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-24 12:33:43,635 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 43 flow [2023-08-24 12:33:43,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:43,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:43,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:33:43,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:33:43,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1484939506, now seen corresponding path program 1 times [2023-08-24 12:33:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777751896] [2023-08-24 12:33:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:43,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777751896] [2023-08-24 12:33:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777751896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:43,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087557864] [2023-08-24 12:33:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:43,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:43,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:43,738 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) [2023-08-24 12:33:43,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 12:33:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:43,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:33:43,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:33:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:43,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:33:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087557864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:33:43,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:33:43,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:33:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62064822] [2023-08-24 12:33:43,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:33:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:33:43,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:33:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:33:43,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 196 [2023-08-24 12:33:43,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 43 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:43,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 196 [2023-08-24 12:33:43,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:43,975 INFO L124 PetriNetUnfolderBase]: 16/46 cut-off events. [2023-08-24 12:33:43,975 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-24 12:33:43,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 46 events. 16/46 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-24 12:33:43,978 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-24 12:33:43,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-08-24 12:33:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:33:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:33:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-24 12:33:43,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46683673469387754 [2023-08-24 12:33:43,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-24 12:33:43,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-24 12:33:43,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:43,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-24 12:33:43,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,987 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,990 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 43 flow. Second operand 4 states and 366 transitions. [2023-08-24 12:33:43,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-08-24 12:33:43,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:33:43,995 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-24 12:33:43,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-24 12:33:43,996 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -6 predicate places. [2023-08-24 12:33:43,996 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-24 12:33:43,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:43,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:33:44,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 12:33:44,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:44,205 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:33:44,207 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:33:44,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 108 transitions, 224 flow [2023-08-24 12:33:44,229 INFO L124 PetriNetUnfolderBase]: 17/143 cut-off events. [2023-08-24 12:33:44,230 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:33:44,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 143 events. 17/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 313 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-24 12:33:44,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 108 transitions, 224 flow [2023-08-24 12:33:44,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:44,233 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:44,233 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:44,233 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:44,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 211 flow [2023-08-24 12:33:44,245 INFO L124 PetriNetUnfolderBase]: 16/138 cut-off events. [2023-08-24 12:33:44,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:44,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 138 events. 16/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 302 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-24 12:33:44,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 2296 [2023-08-24 12:33:46,693 INFO L134 LiptonReduction]: Checked pairs total: 3881 [2023-08-24 12:33:46,693 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-24 12:33:46,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:33:46,697 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:33:46,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:33:46,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:33:46,700 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-24 12:33:46,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:46,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:46,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:33:46,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:33:46,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:46,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1916436435, now seen corresponding path program 1 times [2023-08-24 12:33:46,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:46,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794875938] [2023-08-24 12:33:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:46,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:33:46,752 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:33:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:33:46,807 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:33:46,807 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:33:46,807 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:33:46,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:33:46,807 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:33:46,808 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:33:46,809 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:33:46,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:33:46,846 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:33:46,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:46,866 INFO L124 PetriNetUnfolderBase]: 31/233 cut-off events. [2023-08-24 12:33:46,867 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:33:46,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 233 events. 31/233 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 631 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 12:33:46,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:46,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:46,870 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:46,870 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:46,870 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:46,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:46,888 INFO L124 PetriNetUnfolderBase]: 31/233 cut-off events. [2023-08-24 12:33:46,888 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:33:46,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 233 events. 31/233 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 631 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 12:33:46,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 6776 [2023-08-24 12:33:49,410 INFO L134 LiptonReduction]: Checked pairs total: 17409 [2023-08-24 12:33:49,410 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-24 12:33:49,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:33:49,413 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:33:49,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:33:49,414 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:33:49,415 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-24 12:33:49,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:49,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:49,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:33:49,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:33:49,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:49,415 INFO L85 PathProgramCache]: Analyzing trace with hash 23565875, now seen corresponding path program 1 times [2023-08-24 12:33:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:49,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234588285] [2023-08-24 12:33:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:49,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234588285] [2023-08-24 12:33:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234588285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:33:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537130955] [2023-08-24 12:33:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:33:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:33:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:33:49,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 235 [2023-08-24 12:33:49,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:49,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:49,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 235 [2023-08-24 12:33:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:49,742 INFO L124 PetriNetUnfolderBase]: 1376/2498 cut-off events. [2023-08-24 12:33:49,742 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-24 12:33:49,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4822 conditions, 2498 events. 1376/2498 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15280 event pairs, 648 based on Foata normal form. 569/2763 useless extension candidates. Maximal degree in co-relation 645. Up to 2257 conditions per place. [2023-08-24 12:33:49,752 INFO L140 encePairwiseOnDemand]: 217/235 looper letters, 28 selfloop transitions, 2 changer transitions 11/50 dead transitions. [2023-08-24 12:33:49,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 196 flow [2023-08-24 12:33:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:33:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:33:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-24 12:33:49,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2023-08-24 12:33:49,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-24 12:33:49,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-24 12:33:49,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:49,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-24 12:33:49,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:49,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:49,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:49,758 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 385 transitions. [2023-08-24 12:33:49,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 196 flow [2023-08-24 12:33:49,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:33:49,761 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-24 12:33:49,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-24 12:33:49,764 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-24 12:33:49,767 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-24 12:33:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:49,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:49,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:33:49,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:33:49,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:49,770 INFO L85 PathProgramCache]: Analyzing trace with hash 387717995, now seen corresponding path program 1 times [2023-08-24 12:33:49,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:49,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349406031] [2023-08-24 12:33:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:49,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:49,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:49,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349406031] [2023-08-24 12:33:49,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349406031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:49,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254624349] [2023-08-24 12:33:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:49,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:49,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:49,853 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) [2023-08-24 12:33:49,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:33:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:49,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:33:49,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:33:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:49,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:33:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254624349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:33:49,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:33:49,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:33:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048315999] [2023-08-24 12:33:49,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:33:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:33:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:33:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:33:49,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 235 [2023-08-24 12:33:49,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:49,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:49,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 235 [2023-08-24 12:33:49,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:50,046 INFO L124 PetriNetUnfolderBase]: 286/547 cut-off events. [2023-08-24 12:33:50,046 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-08-24 12:33:50,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 547 events. 286/547 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2554 event pairs, 99 based on Foata normal form. 70/614 useless extension candidates. Maximal degree in co-relation 929. Up to 346 conditions per place. [2023-08-24 12:33:50,047 INFO L140 encePairwiseOnDemand]: 232/235 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-24 12:33:50,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 202 flow [2023-08-24 12:33:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:33:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:33:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 584 transitions. [2023-08-24 12:33:50,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970212765957447 [2023-08-24 12:33:50,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 584 transitions. [2023-08-24 12:33:50,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 584 transitions. [2023-08-24 12:33:50,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:50,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 584 transitions. [2023-08-24 12:33:50,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:50,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:50,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:50,054 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 5 states and 584 transitions. [2023-08-24 12:33:50,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 202 flow [2023-08-24 12:33:50,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:33:50,057 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-24 12:33:50,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-24 12:33:50,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -6 predicate places. [2023-08-24 12:33:50,060 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-24 12:33:50,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:50,061 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:33:50,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 12:33:50,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:50,267 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:33:50,267 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:33:50,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:50,292 INFO L124 PetriNetUnfolderBase]: 31/233 cut-off events. [2023-08-24 12:33:50,292 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:33:50,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 233 events. 31/233 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 631 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 12:33:50,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:50,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:50,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:50,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:50,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:50,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-08-24 12:33:50,311 INFO L124 PetriNetUnfolderBase]: 31/233 cut-off events. [2023-08-24 12:33:50,311 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:33:50,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 233 events. 31/233 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 631 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 12:33:50,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 6776 [2023-08-24 12:33:52,703 INFO L134 LiptonReduction]: Checked pairs total: 15880 [2023-08-24 12:33:52,703 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-24 12:33:52,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:33:52,705 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:33:52,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:33:52,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:33:52,709 INFO L124 PetriNetUnfolderBase]: 12/57 cut-off events. [2023-08-24 12:33:52,709 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:33:52,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:52,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:33:52,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:33:52,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1810717446, now seen corresponding path program 1 times [2023-08-24 12:33:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:52,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247254134] [2023-08-24 12:33:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:52,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:33:52,726 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:33:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:33:52,738 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:33:52,738 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:33:52,739 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:33:52,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:33:52,739 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:33:52,739 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:33:52,739 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:33:52,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:33:52,755 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:33:52,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:52,784 INFO L124 PetriNetUnfolderBase]: 50/356 cut-off events. [2023-08-24 12:33:52,785 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:33:52,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 356 events. 50/356 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1105 event pairs, 1 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 241. Up to 16 conditions per place. [2023-08-24 12:33:52,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:52,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:52,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:52,790 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:52,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:52,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:52,816 INFO L124 PetriNetUnfolderBase]: 50/356 cut-off events. [2023-08-24 12:33:52,816 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:33:52,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 356 events. 50/356 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1105 event pairs, 1 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 241. Up to 16 conditions per place. [2023-08-24 12:33:52,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-08-24 12:33:55,405 INFO L134 LiptonReduction]: Checked pairs total: 32943 [2023-08-24 12:33:55,405 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-24 12:33:55,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:33:55,407 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:33:55,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:33:55,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:33:55,408 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-24 12:33:55,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:33:55,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:55,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:33:55,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:33:55,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 36185049, now seen corresponding path program 1 times [2023-08-24 12:33:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:55,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554933935] [2023-08-24 12:33:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554933935] [2023-08-24 12:33:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554933935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:33:55,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:33:55,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:33:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027550773] [2023-08-24 12:33:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:33:55,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:33:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:33:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:33:55,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-08-24 12:33:55,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:55,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:55,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-08-24 12:33:55,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:58,161 INFO L124 PetriNetUnfolderBase]: 23815/35886 cut-off events. [2023-08-24 12:33:58,161 INFO L125 PetriNetUnfolderBase]: For 1071/1071 co-relation queries the response was YES. [2023-08-24 12:33:58,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70265 conditions, 35886 events. 23815/35886 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 248390 event pairs, 15337 based on Foata normal form. 7136/40059 useless extension candidates. Maximal degree in co-relation 5685. Up to 33630 conditions per place. [2023-08-24 12:33:58,384 INFO L140 encePairwiseOnDemand]: 260/283 looper letters, 41 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-08-24 12:33:58,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 262 flow [2023-08-24 12:33:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:33:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:33:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-24 12:33:58,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552414605418139 [2023-08-24 12:33:58,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-24 12:33:58,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-24 12:33:58,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:58,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-24 12:33:58,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:58,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:58,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:58,391 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 469 transitions. [2023-08-24 12:33:58,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 262 flow [2023-08-24 12:33:58,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:33:58,394 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-08-24 12:33:58,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-24 12:33:58,396 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-24 12:33:58,396 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-08-24 12:33:58,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:33:58,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:33:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:33:58,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:33:58,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:33:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash -735179162, now seen corresponding path program 1 times [2023-08-24 12:33:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:33:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077866580] [2023-08-24 12:33:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:33:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:58,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:33:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077866580] [2023-08-24 12:33:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077866580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:33:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738232135] [2023-08-24 12:33:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:33:58,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:58,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:33:58,452 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) [2023-08-24 12:33:58,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 12:33:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:33:58,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:33:58,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:33:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:58,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:33:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:33:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738232135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:33:58,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:33:58,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:33:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344874667] [2023-08-24 12:33:58,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:33:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:33:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:33:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:33:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:33:58,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-08-24 12:33:58,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:58,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:33:58,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-08-24 12:33:58,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:33:59,169 INFO L124 PetriNetUnfolderBase]: 5560/8368 cut-off events. [2023-08-24 12:33:59,169 INFO L125 PetriNetUnfolderBase]: For 1090/1090 co-relation queries the response was YES. [2023-08-24 12:33:59,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17576 conditions, 8368 events. 5560/8368 cut-off events. For 1090/1090 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 49489 event pairs, 70 based on Foata normal form. 819/9185 useless extension candidates. Maximal degree in co-relation 15499. Up to 5346 conditions per place. [2023-08-24 12:33:59,188 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-24 12:33:59,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 377 flow [2023-08-24 12:33:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:33:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:33:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 866 transitions. [2023-08-24 12:33:59,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100117785630153 [2023-08-24 12:33:59,191 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 866 transitions. [2023-08-24 12:33:59,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 866 transitions. [2023-08-24 12:33:59,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:33:59,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 866 transitions. [2023-08-24 12:33:59,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:59,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:59,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:59,196 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 866 transitions. [2023-08-24 12:33:59,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 377 flow [2023-08-24 12:33:59,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 93 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 12:33:59,200 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-24 12:33:59,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-24 12:33:59,202 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-24 12:33:59,202 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-24 12:33:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:33:59,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:33:59,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 12:33:59,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:33:59,408 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:33:59,408 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:33:59,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:59,440 INFO L124 PetriNetUnfolderBase]: 50/356 cut-off events. [2023-08-24 12:33:59,440 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:33:59,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 356 events. 50/356 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1105 event pairs, 1 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 241. Up to 16 conditions per place. [2023-08-24 12:33:59,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:59,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:59,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:33:59,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:59,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:59,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-08-24 12:33:59,472 INFO L124 PetriNetUnfolderBase]: 50/356 cut-off events. [2023-08-24 12:33:59,473 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:33:59,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 356 events. 50/356 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1105 event pairs, 1 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 241. Up to 16 conditions per place. [2023-08-24 12:33:59,483 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-08-24 12:34:01,789 INFO L134 LiptonReduction]: Checked pairs total: 33261 [2023-08-24 12:34:01,789 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-24 12:34:01,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:34:01,791 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:34:01,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:34:01,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:34:01,797 INFO L124 PetriNetUnfolderBase]: 21/92 cut-off events. [2023-08-24 12:34:01,797 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:34:01,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:34:01,797 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:34:01,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:34:01,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:34:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash -192567524, now seen corresponding path program 1 times [2023-08-24 12:34:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:34:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727681702] [2023-08-24 12:34:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:34:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:34:01,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:34:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:34:01,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:34:01,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:34:01,844 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:34:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:34:01,844 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:34:01,846 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:34:01,846 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:34:01,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:34:01,867 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:34:01,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:01,929 INFO L124 PetriNetUnfolderBase]: 81/547 cut-off events. [2023-08-24 12:34:01,929 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:34:01,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 547 events. 81/547 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2000 event pairs, 6 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 376. Up to 32 conditions per place. [2023-08-24 12:34:01,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:01,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:01,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:34:01,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:01,937 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:01,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:01,989 INFO L124 PetriNetUnfolderBase]: 81/547 cut-off events. [2023-08-24 12:34:01,989 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:34:01,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 547 events. 81/547 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2000 event pairs, 6 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 376. Up to 32 conditions per place. [2023-08-24 12:34:02,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 20496 [2023-08-24 12:34:04,694 INFO L134 LiptonReduction]: Checked pairs total: 56267 [2023-08-24 12:34:04,695 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-24 12:34:04,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:34:04,696 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:34:04,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:34:04,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:34:04,698 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-08-24 12:34:04,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:34:04,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:34:04,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:34:04,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:34:04,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:34:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash 50656231, now seen corresponding path program 1 times [2023-08-24 12:34:04,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:34:04,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689932762] [2023-08-24 12:34:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:04,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:34:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:34:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:04,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:34:04,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689932762] [2023-08-24 12:34:04,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689932762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:34:04,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:34:04,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:34:04,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642700704] [2023-08-24 12:34:04,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:34:04,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:34:04,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:34:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:34:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:34:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 325 [2023-08-24 12:34:04,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:04,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:34:04,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 325 [2023-08-24 12:34:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:34:25,690 INFO L124 PetriNetUnfolderBase]: 230525/320654 cut-off events. [2023-08-24 12:34:25,690 INFO L125 PetriNetUnfolderBase]: For 11952/11952 co-relation queries the response was YES. [2023-08-24 12:34:26,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629140 conditions, 320654 events. 230525/320654 cut-off events. For 11952/11952 co-relation queries the response was YES. Maximal size of possible extension queue 7302. Compared 2507608 event pairs, 187184 based on Foata normal form. 59840/354865 useless extension candidates. Maximal degree in co-relation 60875. Up to 301798 conditions per place. [2023-08-24 12:34:27,037 INFO L140 encePairwiseOnDemand]: 295/325 looper letters, 46 selfloop transitions, 2 changer transitions 13/77 dead transitions. [2023-08-24 12:34:27,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 316 flow [2023-08-24 12:34:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:34:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:34:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-08-24 12:34:27,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563076923076923 [2023-08-24 12:34:27,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-08-24 12:34:27,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-08-24 12:34:27,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:34:27,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-08-24 12:34:27,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:27,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:27,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:27,049 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 549 transitions. [2023-08-24 12:34:27,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 316 flow [2023-08-24 12:34:27,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:34:27,057 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 146 flow [2023-08-24 12:34:27,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2023-08-24 12:34:27,058 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-24 12:34:27,058 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 146 flow [2023-08-24 12:34:27,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:27,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:34:27,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:34:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:34:27,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:34:27,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:34:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1058697645, now seen corresponding path program 1 times [2023-08-24 12:34:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:34:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208923189] [2023-08-24 12:34:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:27,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:34:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:34:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:27,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:34:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208923189] [2023-08-24 12:34:27,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208923189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:34:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002263831] [2023-08-24 12:34:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:27,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:34:27,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:34:27,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:34:27,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 12:34:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:34:27,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:34:27,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:34:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:27,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:34:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002263831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:34:27,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:34:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 12:34:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480790014] [2023-08-24 12:34:27,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:34:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 12:34:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:34:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 12:34:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 12:34:27,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 325 [2023-08-24 12:34:27,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:27,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:34:27,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 325 [2023-08-24 12:34:27,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:34:34,950 INFO L124 PetriNetUnfolderBase]: 96934/132256 cut-off events. [2023-08-24 12:34:34,950 INFO L125 PetriNetUnfolderBase]: For 12202/12202 co-relation queries the response was YES. [2023-08-24 12:34:35,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271251 conditions, 132256 events. 96934/132256 cut-off events. For 12202/12202 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 933666 event pairs, 11714 based on Foata normal form. 584/132815 useless extension candidates. Maximal degree in co-relation 97100. Up to 83201 conditions per place. [2023-08-24 12:34:35,597 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 111 selfloop transitions, 5 changer transitions 1/133 dead transitions. [2023-08-24 12:34:35,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 133 transitions, 538 flow [2023-08-24 12:34:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:34:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:34:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1032 transitions. [2023-08-24 12:34:35,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292307692307693 [2023-08-24 12:34:35,599 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1032 transitions. [2023-08-24 12:34:35,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1032 transitions. [2023-08-24 12:34:35,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:34:35,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1032 transitions. [2023-08-24 12:34:35,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:35,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:35,605 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:35,605 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 146 flow. Second operand 6 states and 1032 transitions. [2023-08-24 12:34:35,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 133 transitions, 538 flow [2023-08-24 12:34:35,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 530 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 12:34:35,620 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-24 12:34:35,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-24 12:34:35,621 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-24 12:34:35,621 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-24 12:34:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:34:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:34:35,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 12:34:35,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:34:35,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:34:35,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:34:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -890360135, now seen corresponding path program 1 times [2023-08-24 12:34:35,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:34:35,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698294871] [2023-08-24 12:34:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:35,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:34:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:34:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-24 12:34:35,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:34:35,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698294871] [2023-08-24 12:34:35,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698294871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:34:35,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:34:35,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:34:35,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323050465] [2023-08-24 12:34:35,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:34:35,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:34:35,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:34:35,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:34:35,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:34:35,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-24 12:34:35,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 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) [2023-08-24 12:34:35,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:34:35,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-24 12:34:35,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:34:51,380 INFO L124 PetriNetUnfolderBase]: 195434/260044 cut-off events. [2023-08-24 12:34:51,380 INFO L125 PetriNetUnfolderBase]: For 187178/187178 co-relation queries the response was YES. [2023-08-24 12:34:51,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599332 conditions, 260044 events. 195434/260044 cut-off events. For 187178/187178 co-relation queries the response was YES. Maximal size of possible extension queue 5395. Compared 1730790 event pairs, 98977 based on Foata normal form. 144/259967 useless extension candidates. Maximal degree in co-relation 488629. Up to 251105 conditions per place. [2023-08-24 12:34:52,948 INFO L140 encePairwiseOnDemand]: 319/325 looper letters, 69 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2023-08-24 12:34:52,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 416 flow [2023-08-24 12:34:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:34:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:34:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-24 12:34:52,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2023-08-24 12:34:52,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-24 12:34:52,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-24 12:34:52,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:34:52,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-24 12:34:52,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:52,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:52,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:52,953 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 3 states and 495 transitions. [2023-08-24 12:34:52,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 416 flow [2023-08-24 12:34:52,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 396 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-24 12:34:52,988 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 194 flow [2023-08-24 12:34:52,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-08-24 12:34:52,989 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-24 12:34:52,989 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 194 flow [2023-08-24 12:34:52,989 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) [2023-08-24 12:34:52,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:34:52,990 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:34:52,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 12:34:52,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:34:52,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:34:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash 705051481, now seen corresponding path program 1 times [2023-08-24 12:34:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:34:52,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558735041] [2023-08-24 12:34:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:34:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:34:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:53,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:34:53,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558735041] [2023-08-24 12:34:53,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558735041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:34:53,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409343835] [2023-08-24 12:34:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:53,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:34:53,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:34:53,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:34:53,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 12:34:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:34:53,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:34:53,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:34:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:53,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:34:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:34:53,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409343835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:34:53,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:34:53,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 12:34:53,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55160841] [2023-08-24 12:34:53,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:34:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 12:34:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:34:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 12:34:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-24 12:34:53,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 325 [2023-08-24 12:34:53,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 154.91666666666666) internal successors, (1859), 12 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:53,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:34:53,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 325 [2023-08-24 12:34:53,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:34:56,602 INFO L124 PetriNetUnfolderBase]: 35761/50674 cut-off events. [2023-08-24 12:34:56,602 INFO L125 PetriNetUnfolderBase]: For 38184/38184 co-relation queries the response was YES. [2023-08-24 12:34:56,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112280 conditions, 50674 events. 35761/50674 cut-off events. For 38184/38184 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 344611 event pairs, 358 based on Foata normal form. 5157/55634 useless extension candidates. Maximal degree in co-relation 66454. Up to 23220 conditions per place. [2023-08-24 12:34:56,724 INFO L140 encePairwiseOnDemand]: 322/325 looper letters, 0 selfloop transitions, 0 changer transitions 139/139 dead transitions. [2023-08-24 12:34:56,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 621 flow [2023-08-24 12:34:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:34:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:34:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1178 transitions. [2023-08-24 12:34:56,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178021978021978 [2023-08-24 12:34:56,727 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1178 transitions. [2023-08-24 12:34:56,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1178 transitions. [2023-08-24 12:34:56,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:34:56,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1178 transitions. [2023-08-24 12:34:56,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:56,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:56,733 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:56,733 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 194 flow. Second operand 7 states and 1178 transitions. [2023-08-24 12:34:56,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 621 flow [2023-08-24 12:34:56,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 601 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-24 12:34:56,746 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-24 12:34:56,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-24 12:34:56,746 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-24 12:34:56,747 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-24 12:34:56,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 154.91666666666666) internal successors, (1859), 12 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:34:56,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:34:56,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 12:34:56,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 12:34:56,952 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 12:34:56,953 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:34:56,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:56,986 INFO L124 PetriNetUnfolderBase]: 81/547 cut-off events. [2023-08-24 12:34:56,987 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:34:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 547 events. 81/547 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2000 event pairs, 6 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 376. Up to 32 conditions per place. [2023-08-24 12:34:56,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:56,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:56,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:34:56,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:56,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:56,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-08-24 12:34:57,031 INFO L124 PetriNetUnfolderBase]: 81/547 cut-off events. [2023-08-24 12:34:57,032 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:34:57,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 547 events. 81/547 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2000 event pairs, 6 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 376. Up to 32 conditions per place. [2023-08-24 12:34:57,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 20496 [2023-08-24 12:34:59,678 INFO L134 LiptonReduction]: Checked pairs total: 56542 [2023-08-24 12:34:59,678 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-24 12:34:59,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:34:59,680 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:34:59,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:34:59,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:34:59,686 INFO L124 PetriNetUnfolderBase]: 33/136 cut-off events. [2023-08-24 12:34:59,686 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 12:34:59,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:34:59,686 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:34:59,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:34:59,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:34:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2014651828, now seen corresponding path program 1 times [2023-08-24 12:34:59,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:34:59,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781713861] [2023-08-24 12:34:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:34:59,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:34:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:34:59,711 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:34:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:34:59,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:34:59,734 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:34:59,734 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:34:59,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 12:34:59,734 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:34:59,737 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:34:59,738 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:34:59,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:34:59,770 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:34:59,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 516 flow [2023-08-24 12:34:59,877 INFO L124 PetriNetUnfolderBase]: 140/878 cut-off events. [2023-08-24 12:34:59,878 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:34:59,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 878 events. 140/878 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3869 event pairs, 23 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 592. Up to 80 conditions per place. [2023-08-24 12:34:59,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 228 transitions, 516 flow [2023-08-24 12:34:59,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 228 transitions, 516 flow [2023-08-24 12:34:59,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:34:59,892 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 228 transitions, 516 flow [2023-08-24 12:34:59,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 228 transitions, 516 flow [2023-08-24 12:34:59,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 516 flow [2023-08-24 12:34:59,988 INFO L124 PetriNetUnfolderBase]: 140/878 cut-off events. [2023-08-24 12:34:59,989 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:34:59,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 878 events. 140/878 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3869 event pairs, 23 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 592. Up to 80 conditions per place. [2023-08-24 12:35:00,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 29960 [2023-08-24 12:35:02,985 INFO L134 LiptonReduction]: Checked pairs total: 94745 [2023-08-24 12:35:02,985 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-24 12:35:02,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:35:02,987 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=LoopsAndPotentialCycles, 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;@62eecd2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:35:02,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:35:02,988 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:35:02,988 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-08-24 12:35:02,988 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:35:02,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:35:02,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:35:02,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:35:02,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:35:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash 66878003, now seen corresponding path program 1 times [2023-08-24 12:35:02,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:35:02,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749100506] [2023-08-24 12:35:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:35:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:35:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:35:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:35:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:35:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749100506] [2023-08-24 12:35:03,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749100506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:35:03,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:35:03,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:35:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250437278] [2023-08-24 12:35:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:35:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:35:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:35:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:35:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:35:03,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 370 [2023-08-24 12:35:03,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:35:03,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:35:03,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 370 [2023-08-24 12:35:03,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand