/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_61-invariant_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:45:38,311 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:45:38,382 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 12:45:38,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:45:38,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:45:38,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:45:38,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:45:38,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:45:38,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:45:38,416 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:45:38,417 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:45:38,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:45:38,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:45:38,418 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:45:38,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:45:38,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:45:38,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:45:38,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:45:38,419 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:45:38,419 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:45:38,419 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:45:38,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:45:38,420 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:45:38,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:45:38,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:45:38,421 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:45:38,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:45:38,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:45:38,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:45:38,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:45:38,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:45:38,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:45:38,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:45:38,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:45:38,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:45:38,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:45:38,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:45:38,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:45:38,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:45:38,714 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:45:38,714 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:45:38,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-08-24 12:45:39,752 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:45:39,978 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:45:39,979 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-08-24 12:45:40,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0a3d241/aaa56540ed634902a56c45fdb923c11f/FLAGfd96e702f [2023-08-24 12:45:40,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0a3d241/aaa56540ed634902a56c45fdb923c11f [2023-08-24 12:45:40,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:45:40,014 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:45:40,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:45:40,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:45:40,017 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:45:40,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ca3c9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40, skipping insertion in model container [2023-08-24 12:45:40,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,074 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:45:40,243 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_61-invariant_racing.i[30176,30189] [2023-08-24 12:45:40,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:45:40,273 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:45:40,301 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:45:40,302 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:45:40,321 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_61-invariant_racing.i[30176,30189] [2023-08-24 12:45:40,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:45:40,360 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:45:40,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40 WrapperNode [2023-08-24 12:45:40,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:45:40,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:45:40,362 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:45:40,362 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:45:40,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,412 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2023-08-24 12:45:40,413 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:45:40,414 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:45:40,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:45:40,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:45:40,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,423 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,445 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:45:40,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:45:40,446 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:45:40,446 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:45:40,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (1/1) ... [2023-08-24 12:45:40,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:45:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:45:40,493 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 12:45:40,502 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 12:45:40,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:45:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:45:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:45:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:45:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:45:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:45:40,530 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:45:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:45:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:45:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:45:40,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:45:40,532 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 12:45:40,626 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:45:40,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:45:40,775 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:45:40,782 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:45:40,782 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-24 12:45:40,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:45:40 BoogieIcfgContainer [2023-08-24 12:45:40,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:45:40,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:45:40,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:45:40,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:45:40,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:45:40" (1/3) ... [2023-08-24 12:45:40,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e46261a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:45:40, skipping insertion in model container [2023-08-24 12:45:40,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:45:40" (2/3) ... [2023-08-24 12:45:40,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e46261a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:45:40, skipping insertion in model container [2023-08-24 12:45:40,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:45:40" (3/3) ... [2023-08-24 12:45:40,789 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-08-24 12:45:40,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:45:40,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:45:40,799 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:45:40,842 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:45:40,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 126 transitions, 260 flow [2023-08-24 12:45:40,921 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2023-08-24 12:45:40,921 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:45:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 183 events. 30/183 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 538 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-08-24 12:45:40,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 126 transitions, 260 flow [2023-08-24 12:45:40,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:40,933 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:40,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:40,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:40,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:40,960 INFO L124 PetriNetUnfolderBase]: 29/178 cut-off events. [2023-08-24 12:45:40,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 178 events. 29/178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 528 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-08-24 12:45:40,963 INFO L119 LiptonReduction]: Number of co-enabled transitions 3906 [2023-08-24 12:45:42,646 INFO L134 LiptonReduction]: Checked pairs total: 10855 [2023-08-24 12:45:42,646 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-24 12:45:42,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:45:42,665 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:42,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:42,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:42,676 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-08-24 12:45:42,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:42,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:42,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 12:45:42,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:42,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash 456964867, now seen corresponding path program 1 times [2023-08-24 12:45:42,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:42,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320461366] [2023-08-24 12:45:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:42,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:42,841 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 12:45:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320461366] [2023-08-24 12:45:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320461366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:45:42,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:45:42,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:45:42,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900389692] [2023-08-24 12:45:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:45:42,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:45:42,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:45:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:45:42,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 215 [2023-08-24 12:45:42,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 12:45:42,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:42,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 215 [2023-08-24 12:45:42,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:45:42,972 INFO L124 PetriNetUnfolderBase]: 161/376 cut-off events. [2023-08-24 12:45:42,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:42,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 376 events. 161/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1555 event pairs, 75 based on Foata normal form. 69/404 useless extension candidates. Maximal degree in co-relation 697. Up to 321 conditions per place. [2023-08-24 12:45:42,976 INFO L140 encePairwiseOnDemand]: 197/215 looper letters, 32 selfloop transitions, 2 changer transitions 6/48 dead transitions. [2023-08-24 12:45:42,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 179 flow [2023-08-24 12:45:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:45:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:45:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-24 12:45:42,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2023-08-24 12:45:42,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-24 12:45:42,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-24 12:45:43,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:45:43,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-24 12:45:43,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 12:45:43,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 12:45:43,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 12:45:43,016 INFO L175 Difference]: Start difference. First operand has 40 places, 52 transitions, 109 flow. Second operand 3 states and 355 transitions. [2023-08-24 12:45:43,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 179 flow [2023-08-24 12:45:43,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:45:43,021 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 75 flow [2023-08-24 12:45:43,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-24 12:45:43,031 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-24 12:45:43,031 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 75 flow [2023-08-24 12:45:43,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 12:45:43,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:43,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:45:43,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:45:43,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:43,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash 735836900, now seen corresponding path program 1 times [2023-08-24 12:45:43,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:43,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052849842] [2023-08-24 12:45:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:43,194 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 12:45:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052849842] [2023-08-24 12:45:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052849842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:45:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708261614] [2023-08-24 12:45:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:43,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:45:43,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:45:43,207 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 12:45:43,231 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 12:45:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:43,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:45:43,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:45:43,345 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 12:45:43,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:45:43,360 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 12:45:43,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708261614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:45:43,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:45:43,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:45:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731252519] [2023-08-24 12:45:43,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:45:43,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:45:43,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:45:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:45:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 215 [2023-08-24 12:45:43,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 101.28571428571429) internal successors, (709), 7 states have internal predecessors, (709), 0 states have call successors, (0), 0 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 12:45:43,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 215 [2023-08-24 12:45:43,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:45:43,393 INFO L124 PetriNetUnfolderBase]: 21/58 cut-off events. [2023-08-24 12:45:43,393 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-24 12:45:43,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 58 events. 21/58 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 0 based on Foata normal form. 10/64 useless extension candidates. Maximal degree in co-relation 125. Up to 40 conditions per place. [2023-08-24 12:45:43,393 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-24 12:45:43,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 119 flow [2023-08-24 12:45:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:45:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:45:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-08-24 12:45:43,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2023-08-24 12:45:43,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-08-24 12:45:43,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-08-24 12:45:43,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:45:43,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-08-24 12:45:43,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 12:45:43,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 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 12:45:43,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 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 12:45:43,398 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 75 flow. Second operand 4 states and 418 transitions. [2023-08-24 12:45:43,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 119 flow [2023-08-24 12:45:43,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 113 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:45:43,399 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-24 12:45:43,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-24 12:45:43,400 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -16 predicate places. [2023-08-24 12:45:43,400 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-24 12:45:43,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.28571428571429) internal successors, (709), 7 states have internal predecessors, (709), 0 states have call successors, (0), 0 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 12:45:43,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:45:43,410 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 12:45:43,609 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 12:45:43,609 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:45:43,612 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:45:43,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 126 transitions, 260 flow [2023-08-24 12:45:43,625 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2023-08-24 12:45:43,625 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:45:43,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 183 events. 30/183 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 538 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-08-24 12:45:43,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 126 transitions, 260 flow [2023-08-24 12:45:43,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:43,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:43,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:43,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:43,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 121 transitions, 247 flow [2023-08-24 12:45:43,636 INFO L124 PetriNetUnfolderBase]: 29/178 cut-off events. [2023-08-24 12:45:43,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:43,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 178 events. 29/178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 528 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-08-24 12:45:43,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 3906 [2023-08-24 12:45:45,072 INFO L134 LiptonReduction]: Checked pairs total: 9525 [2023-08-24 12:45:45,073 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-24 12:45:45,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:45:45,081 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:45,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:45,085 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:45,085 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-08-24 12:45:45,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:45,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:45,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:45:45,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:45:45,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -372543242, now seen corresponding path program 1 times [2023-08-24 12:45:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:45,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520816313] [2023-08-24 12:45:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:45:45,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:45:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:45:45,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:45:45,159 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:45:45,160 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:45:45,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:45:45,160 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:45:45,160 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:45:45,161 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:45:45,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:45:45,179 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:45:45,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:45,196 INFO L124 PetriNetUnfolderBase]: 51/298 cut-off events. [2023-08-24 12:45:45,196 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:45:45,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 51/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1007 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 185. Up to 9 conditions per place. [2023-08-24 12:45:45,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:45,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:45,199 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:45,199 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:45,199 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:45,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:45,220 INFO L124 PetriNetUnfolderBase]: 51/298 cut-off events. [2023-08-24 12:45:45,220 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:45:45,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 51/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1007 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 185. Up to 9 conditions per place. [2023-08-24 12:45:45,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 10416 [2023-08-24 12:45:46,780 INFO L134 LiptonReduction]: Checked pairs total: 31603 [2023-08-24 12:45:46,780 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-24 12:45:46,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:45:46,782 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:46,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:46,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:46,784 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-24 12:45:46,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:46,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:46,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 12:45:46,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:46,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:46,784 INFO L85 PathProgramCache]: Analyzing trace with hash 826130769, now seen corresponding path program 1 times [2023-08-24 12:45:46,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859573518] [2023-08-24 12:45:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:46,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:46,823 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 12:45:46,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:46,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859573518] [2023-08-24 12:45:46,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859573518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:45:46,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:45:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:45:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077572554] [2023-08-24 12:45:46,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:45:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:45:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:45:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:45:46,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-24 12:45:46,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 12:45:46,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:46,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-24 12:45:46,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:45:47,188 INFO L124 PetriNetUnfolderBase]: 3002/4975 cut-off events. [2023-08-24 12:45:47,188 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-24 12:45:47,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9677 conditions, 4975 events. 3002/4975 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 31278 event pairs, 2245 based on Foata normal form. 1203/5689 useless extension candidates. Maximal degree in co-relation 3251. Up to 4630 conditions per place. [2023-08-24 12:45:47,203 INFO L140 encePairwiseOnDemand]: 242/265 looper letters, 41 selfloop transitions, 2 changer transitions 10/69 dead transitions. [2023-08-24 12:45:47,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 258 flow [2023-08-24 12:45:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:45:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:45:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-24 12:45:47,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622641509433962 [2023-08-24 12:45:47,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-24 12:45:47,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-24 12:45:47,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:45:47,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-24 12:45:47,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 12:45:47,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 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 12:45:47,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 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 12:45:47,209 INFO L175 Difference]: Start difference. First operand has 60 places, 79 transitions, 176 flow. Second operand 3 states and 447 transitions. [2023-08-24 12:45:47,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 258 flow [2023-08-24 12:45:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:45:47,211 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 118 flow [2023-08-24 12:45:47,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-08-24 12:45:47,211 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-24 12:45:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 118 flow [2023-08-24 12:45:47,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 12:45:47,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:47,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:45:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:45:47,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:47,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1047775930, now seen corresponding path program 1 times [2023-08-24 12:45:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097877838] [2023-08-24 12:45:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:47,245 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 12:45:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:47,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097877838] [2023-08-24 12:45:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097877838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:45:47,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706150453] [2023-08-24 12:45:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:47,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:45:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:45:47,247 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 12:45:47,264 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 12:45:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:47,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:45:47,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:45:47,333 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 12:45:47,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:45:47,355 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 12:45:47,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706150453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:45:47,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:45:47,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 12:45:47,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833301655] [2023-08-24 12:45:47,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:45:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 12:45:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 12:45:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 12:45:47,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-24 12:45:47,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 126.16666666666667) internal successors, (757), 6 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 12:45:47,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:47,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-24 12:45:47,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:45:47,437 INFO L124 PetriNetUnfolderBase]: 425/779 cut-off events. [2023-08-24 12:45:47,437 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-08-24 12:45:47,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 779 events. 425/779 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3807 event pairs, 40 based on Foata normal form. 88/831 useless extension candidates. Maximal degree in co-relation 260. Up to 480 conditions per place. [2023-08-24 12:45:47,439 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-24 12:45:47,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 250 flow [2023-08-24 12:45:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:45:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:45:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-08-24 12:45:47,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049056603773585 [2023-08-24 12:45:47,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-08-24 12:45:47,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-08-24 12:45:47,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:45:47,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-08-24 12:45:47,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 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 12:45:47,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 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 12:45:47,445 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 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 12:45:47,445 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 118 flow. Second operand 5 states and 669 transitions. [2023-08-24 12:45:47,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 250 flow [2023-08-24 12:45:47,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:45:47,446 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-24 12:45:47,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-24 12:45:47,446 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -15 predicate places. [2023-08-24 12:45:47,447 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-24 12:45:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.16666666666667) internal successors, (757), 6 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 12:45:47,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:45:47,464 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 12:45:47,652 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 12:45:47,652 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:45:47,652 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:45:47,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:47,667 INFO L124 PetriNetUnfolderBase]: 51/298 cut-off events. [2023-08-24 12:45:47,667 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:45:47,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 51/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1007 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 185. Up to 9 conditions per place. [2023-08-24 12:45:47,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:47,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:47,669 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:47,669 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:47,670 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:47,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 159 transitions, 336 flow [2023-08-24 12:45:47,682 INFO L124 PetriNetUnfolderBase]: 51/298 cut-off events. [2023-08-24 12:45:47,682 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:45:47,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 51/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1007 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 185. Up to 9 conditions per place. [2023-08-24 12:45:47,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 10416 [2023-08-24 12:45:49,224 INFO L134 LiptonReduction]: Checked pairs total: 32019 [2023-08-24 12:45:49,224 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-24 12:45:49,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:45:49,226 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:49,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:49,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:49,230 INFO L124 PetriNetUnfolderBase]: 22/89 cut-off events. [2023-08-24 12:45:49,230 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:45:49,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:49,230 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:45:49,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:45:49,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1599587245, now seen corresponding path program 1 times [2023-08-24 12:45:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511501691] [2023-08-24 12:45:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:45:49,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:45:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:45:49,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:45:49,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:45:49,266 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:45:49,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:45:49,266 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:45:49,267 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:45:49,267 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:45:49,267 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:45:49,294 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:45:49,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:49,327 INFO L124 PetriNetUnfolderBase]: 77/446 cut-off events. [2023-08-24 12:45:49,327 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:45:49,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 446 events. 77/446 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1640 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-08-24 12:45:49,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:49,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:49,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:49,333 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:49,333 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:49,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:49,361 INFO L124 PetriNetUnfolderBase]: 77/446 cut-off events. [2023-08-24 12:45:49,361 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:45:49,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 446 events. 77/446 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1640 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-08-24 12:45:49,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 18786 [2023-08-24 12:45:51,246 INFO L134 LiptonReduction]: Checked pairs total: 63061 [2023-08-24 12:45:51,246 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-24 12:45:51,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:45:51,248 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:51,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:51,249 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:51,249 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-08-24 12:45:51,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:51,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:51,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 12:45:51,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:51,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1251683505, now seen corresponding path program 1 times [2023-08-24 12:45:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:51,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173496254] [2023-08-24 12:45:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:51,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:51,282 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 12:45:51,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:51,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173496254] [2023-08-24 12:45:51,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173496254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:45:51,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:45:51,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:45:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827098595] [2023-08-24 12:45:51,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:45:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:45:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:51,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:45:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:45:51,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 310 [2023-08-24 12:45:51,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 104 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 12:45:51,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:51,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 310 [2023-08-24 12:45:51,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:45:54,184 INFO L124 PetriNetUnfolderBase]: 36296/53524 cut-off events. [2023-08-24 12:45:54,185 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-08-24 12:45:54,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103522 conditions, 53524 events. 36296/53524 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 399830 event pairs, 20689 based on Foata normal form. 10696/60583 useless extension candidates. Maximal degree in co-relation 9490. Up to 49320 conditions per place. [2023-08-24 12:45:54,530 INFO L140 encePairwiseOnDemand]: 280/310 looper letters, 49 selfloop transitions, 2 changer transitions 12/87 dead transitions. [2023-08-24 12:45:54,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 326 flow [2023-08-24 12:45:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:45:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:45:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-24 12:45:54,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795698924731183 [2023-08-24 12:45:54,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-24 12:45:54,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-24 12:45:54,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:45:54,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-24 12:45:54,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 12:45:54,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 12:45:54,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 12:45:54,537 INFO L175 Difference]: Start difference. First operand has 78 places, 104 transitions, 238 flow. Second operand 3 states and 539 transitions. [2023-08-24 12:45:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 326 flow [2023-08-24 12:45:54,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:45:54,541 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 157 flow [2023-08-24 12:45:54,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-08-24 12:45:54,542 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-24 12:45:54,542 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 157 flow [2023-08-24 12:45:54,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 12:45:54,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:54,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:45:54,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:45:54,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:54,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1749599504, now seen corresponding path program 1 times [2023-08-24 12:45:54,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:54,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341187844] [2023-08-24 12:45:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:54,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:54,602 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 12:45:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341187844] [2023-08-24 12:45:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341187844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:45:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760584830] [2023-08-24 12:45:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:54,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:45:54,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:45:54,617 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 12:45:54,669 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 12:45:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:54,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:45:54,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:45:54,746 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 12:45:54,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:45:54,760 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 12:45:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760584830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:45:54,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:45:54,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:45:54,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658457277] [2023-08-24 12:45:54,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:45:54,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:45:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:45:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:45:54,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 310 [2023-08-24 12:45:54,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 151.28571428571428) internal successors, (1059), 7 states have internal predecessors, (1059), 0 states have call successors, (0), 0 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 12:45:54,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:54,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 310 [2023-08-24 12:45:54,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:45:55,293 INFO L124 PetriNetUnfolderBase]: 5017/7440 cut-off events. [2023-08-24 12:45:55,293 INFO L125 PetriNetUnfolderBase]: For 975/975 co-relation queries the response was YES. [2023-08-24 12:45:55,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15349 conditions, 7440 events. 5017/7440 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44918 event pairs, 445 based on Foata normal form. 648/7962 useless extension candidates. Maximal degree in co-relation 11941. Up to 4608 conditions per place. [2023-08-24 12:45:55,308 INFO L140 encePairwiseOnDemand]: 307/310 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2023-08-24 12:45:55,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 106 transitions, 407 flow [2023-08-24 12:45:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:45:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:45:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 976 transitions. [2023-08-24 12:45:55,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524731182795699 [2023-08-24 12:45:55,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 976 transitions. [2023-08-24 12:45:55,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 976 transitions. [2023-08-24 12:45:55,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:45:55,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 976 transitions. [2023-08-24 12:45:55,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 0 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 12:45:55,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 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 12:45:55,314 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 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 12:45:55,314 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 157 flow. Second operand 6 states and 976 transitions. [2023-08-24 12:45:55,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 106 transitions, 407 flow [2023-08-24 12:45:55,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 106 transitions, 403 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 12:45:55,316 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-08-24 12:45:55,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2023-08-24 12:45:55,317 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -15 predicate places. [2023-08-24 12:45:55,317 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-08-24 12:45:55,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.28571428571428) internal successors, (1059), 7 states have internal predecessors, (1059), 0 states have call successors, (0), 0 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 12:45:55,317 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:45:55,328 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 12:45:55,522 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 12:45:55,522 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:45:55,522 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:45:55,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:55,545 INFO L124 PetriNetUnfolderBase]: 77/446 cut-off events. [2023-08-24 12:45:55,545 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:45:55,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 446 events. 77/446 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1640 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-08-24 12:45:55,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:55,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:55,550 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:55,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:55,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:55,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 192 transitions, 414 flow [2023-08-24 12:45:55,573 INFO L124 PetriNetUnfolderBase]: 77/446 cut-off events. [2023-08-24 12:45:55,573 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:45:55,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 446 events. 77/446 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1640 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-08-24 12:45:55,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 18786 [2023-08-24 12:45:57,512 INFO L134 LiptonReduction]: Checked pairs total: 63345 [2023-08-24 12:45:57,512 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-24 12:45:57,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:45:57,516 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:57,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:57,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:57,521 INFO L124 PetriNetUnfolderBase]: 39/145 cut-off events. [2023-08-24 12:45:57,521 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:45:57,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:57,521 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:45:57,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:45:57,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -498185149, now seen corresponding path program 1 times [2023-08-24 12:45:57,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:57,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880234751] [2023-08-24 12:45:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:57,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:45:57,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:45:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:45:57,563 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:45:57,563 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:45:57,564 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:45:57,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:45:57,564 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:45:57,565 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:45:57,565 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:45:57,565 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:45:57,583 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:45:57,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 225 transitions, 494 flow [2023-08-24 12:45:57,627 INFO L124 PetriNetUnfolderBase]: 115/662 cut-off events. [2023-08-24 12:45:57,627 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:45:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 662 events. 115/662 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2719 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 466. Up to 32 conditions per place. [2023-08-24 12:45:57,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 225 transitions, 494 flow [2023-08-24 12:45:57,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 225 transitions, 494 flow [2023-08-24 12:45:57,637 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:45:57,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 225 transitions, 494 flow [2023-08-24 12:45:57,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 225 transitions, 494 flow [2023-08-24 12:45:57,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 225 transitions, 494 flow [2023-08-24 12:45:57,674 INFO L124 PetriNetUnfolderBase]: 115/662 cut-off events. [2023-08-24 12:45:57,675 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:45:57,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 662 events. 115/662 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2719 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 466. Up to 32 conditions per place. [2023-08-24 12:45:57,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 29264 [2023-08-24 12:45:59,724 INFO L134 LiptonReduction]: Checked pairs total: 102981 [2023-08-24 12:45:59,724 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-24 12:45:59,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:45:59,727 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:45:59,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:45:59,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:45:59,728 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-08-24 12:45:59,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:45:59,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:45:59,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 12:45:59,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:45:59,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:45:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1740200059, now seen corresponding path program 1 times [2023-08-24 12:45:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:45:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7819317] [2023-08-24 12:45:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:45:59,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:45:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:45:59,753 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 12:45:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:45:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7819317] [2023-08-24 12:45:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7819317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:45:59,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:45:59,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:45:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876124656] [2023-08-24 12:45:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:45:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:45:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:45:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:45:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:45:59,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 361 [2023-08-24 12:45:59,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 12:45:59,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:45:59,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 361 [2023-08-24 12:45:59,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:46:54,127 INFO L124 PetriNetUnfolderBase]: 685827/928260 cut-off events. [2023-08-24 12:46:54,127 INFO L125 PetriNetUnfolderBase]: For 18067/18067 co-relation queries the response was YES. [2023-08-24 12:46:56,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1806731 conditions, 928260 events. 685827/928260 cut-off events. For 18067/18067 co-relation queries the response was YES. Maximal size of possible extension queue 19885. Compared 7561620 event pairs, 566545 based on Foata normal form. 149522/991263 useless extension candidates. Maximal degree in co-relation 176294. Up to 867755 conditions per place. [2023-08-24 12:46:58,883 INFO L140 encePairwiseOnDemand]: 325/361 looper letters, 63 selfloop transitions, 2 changer transitions 13/104 dead transitions. [2023-08-24 12:46:58,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 104 transitions, 404 flow [2023-08-24 12:46:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:46:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:46:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-24 12:46:58,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863342566943675 [2023-08-24 12:46:58,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-24 12:46:58,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-24 12:46:58,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:46:58,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-24 12:46:58,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 12:46:58,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 12:46:58,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 12:46:58,903 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 298 flow. Second operand 3 states and 635 transitions. [2023-08-24 12:46:58,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 104 transitions, 404 flow [2023-08-24 12:46:58,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:46:58,922 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 198 flow [2023-08-24 12:46:58,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2023-08-24 12:46:58,922 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 3 predicate places. [2023-08-24 12:46:58,922 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 198 flow [2023-08-24 12:46:58,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 12:46:58,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:46:58,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:46:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:46:58,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:46:58,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:46:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash 23934030, now seen corresponding path program 1 times [2023-08-24 12:46:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:46:58,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258644959] [2023-08-24 12:46:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:46:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:46:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:46:58,947 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 12:46:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:46:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258644959] [2023-08-24 12:46:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258644959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:46:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686630432] [2023-08-24 12:46:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:46:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:46:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:46:58,981 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 12:46:59,006 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 12:46:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:46:59,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:46:59,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:46:59,049 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 12:46:59,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:46:59,061 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 12:46:59,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686630432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:46:59,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:46:59,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 12:46:59,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256250096] [2023-08-24 12:46:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:46:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 12:46:59,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:46:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 12:46:59,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 12:46:59,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 361 [2023-08-24 12:46:59,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 176.16666666666666) internal successors, (1057), 6 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 12:46:59,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:46:59,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 361 [2023-08-24 12:46:59,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:47:27,959 INFO L124 PetriNetUnfolderBase]: 412393/548667 cut-off events. [2023-08-24 12:47:27,959 INFO L125 PetriNetUnfolderBase]: For 19896/19896 co-relation queries the response was YES. [2023-08-24 12:47:29,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088561 conditions, 548667 events. 412393/548667 cut-off events. For 19896/19896 co-relation queries the response was YES. Maximal size of possible extension queue 12965. Compared 4153521 event pairs, 55088 based on Foata normal form. 976/525849 useless extension candidates. Maximal degree in co-relation 162535. Up to 435601 conditions per place. [2023-08-24 12:47:30,991 INFO L140 encePairwiseOnDemand]: 357/361 looper letters, 150 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-08-24 12:47:30,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 714 flow [2023-08-24 12:47:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:47:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:47:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-08-24 12:47:30,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2023-08-24 12:47:30,995 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-08-24 12:47:30,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-08-24 12:47:31,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:47:31,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-08-24 12:47:31,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 12:47:31,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 12:47:31,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 12:47:31,022 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 198 flow. Second operand 6 states and 1197 transitions. [2023-08-24 12:47:31,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 714 flow [2023-08-24 12:47:31,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 182 transitions, 706 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 12:47:31,042 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 224 flow [2023-08-24 12:47:31,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2023-08-24 12:47:31,042 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 2 predicate places. [2023-08-24 12:47:31,043 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 224 flow [2023-08-24 12:47:31,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.16666666666666) internal successors, (1057), 6 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 12:47:31,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:47:31,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:47:31,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 12:47:31,247 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 12:47:31,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:47:31,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:47:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1355949378, now seen corresponding path program 1 times [2023-08-24 12:47:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:47:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989276828] [2023-08-24 12:47:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:47:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:47:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:47:31,330 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 12:47:31,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:47:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989276828] [2023-08-24 12:47:31,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989276828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:47:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47079758] [2023-08-24 12:47:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:47:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:47:31,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:47:31,331 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 12:47:31,333 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 12:47:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:47:31,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:47:31,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:47:31,427 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 12:47:31,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:47:31,476 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 12:47:31,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47079758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:47:31,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:47:31,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 12:47:31,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010872921] [2023-08-24 12:47:31,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:47:31,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 12:47:31,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:47:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 12:47:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-24 12:47:31,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 361 [2023-08-24 12:47:31,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 84 transitions, 224 flow. Second operand has 12 states, 12 states have (on average 176.08333333333334) internal successors, (2113), 12 states have internal predecessors, (2113), 0 states have call successors, (0), 0 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 12:47:31,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:47:31,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 361 [2023-08-24 12:47:31,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:47:36,222 INFO L124 PetriNetUnfolderBase]: 63913/88235 cut-off events. [2023-08-24 12:47:36,222 INFO L125 PetriNetUnfolderBase]: For 63608/63608 co-relation queries the response was YES. [2023-08-24 12:47:36,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201519 conditions, 88235 events. 63913/88235 cut-off events. For 63608/63608 co-relation queries the response was YES. Maximal size of possible extension queue 2474. Compared 604250 event pairs, 4928 based on Foata normal form. 7920/91793 useless extension candidates. Maximal degree in co-relation 29858. Up to 39600 conditions per place. [2023-08-24 12:47:36,483 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 0 selfloop transitions, 0 changer transitions 168/168 dead transitions. [2023-08-24 12:47:36,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 168 transitions, 680 flow [2023-08-24 12:47:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:47:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:47:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1357 transitions. [2023-08-24 12:47:36,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370003957261575 [2023-08-24 12:47:36,486 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1357 transitions. [2023-08-24 12:47:36,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1357 transitions. [2023-08-24 12:47:36,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:47:36,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1357 transitions. [2023-08-24 12:47:36,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.85714285714286) internal successors, (1357), 7 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 12:47:36,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 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 12:47:36,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 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 12:47:36,491 INFO L175 Difference]: Start difference. First operand has 97 places, 84 transitions, 224 flow. Second operand 7 states and 1357 transitions. [2023-08-24 12:47:36,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 168 transitions, 680 flow [2023-08-24 12:47:36,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 168 transitions, 661 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 12:47:36,582 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-08-24 12:47:36,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-08-24 12:47:36,583 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -12 predicate places. [2023-08-24 12:47:36,583 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-08-24 12:47:36,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.08333333333334) internal successors, (2113), 12 states have internal predecessors, (2113), 0 states have call successors, (0), 0 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 12:47:36,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:47:36,589 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 12:47:36,788 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,SelfDestructingSolverStorable11 [2023-08-24 12:47:36,789 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:47:36,789 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:47:36,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 225 transitions, 494 flow [2023-08-24 12:47:36,825 INFO L124 PetriNetUnfolderBase]: 115/662 cut-off events. [2023-08-24 12:47:36,826 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:47:36,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 662 events. 115/662 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2719 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 466. Up to 32 conditions per place. [2023-08-24 12:47:36,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 225 transitions, 494 flow [2023-08-24 12:47:36,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 225 transitions, 494 flow [2023-08-24 12:47:36,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:47:36,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 225 transitions, 494 flow [2023-08-24 12:47:36,831 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 225 transitions, 494 flow [2023-08-24 12:47:36,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 225 transitions, 494 flow [2023-08-24 12:47:36,867 INFO L124 PetriNetUnfolderBase]: 115/662 cut-off events. [2023-08-24 12:47:36,867 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:47:36,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 662 events. 115/662 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2719 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 466. Up to 32 conditions per place. [2023-08-24 12:47:36,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 29264 [2023-08-24 12:47:38,680 INFO L134 LiptonReduction]: Checked pairs total: 101885 [2023-08-24 12:47:38,680 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-24 12:47:38,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:47:38,683 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:47:38,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:47:38,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:47:38,690 INFO L124 PetriNetUnfolderBase]: 54/197 cut-off events. [2023-08-24 12:47:38,690 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-24 12:47:38,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:47:38,690 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:47:38,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:47:38,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:47:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -40932937, now seen corresponding path program 1 times [2023-08-24 12:47:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:47:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257898211] [2023-08-24 12:47:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:47:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:47:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:47:38,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:47:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:47:38,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:47:38,723 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:47:38,723 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:47:38,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 12:47:38,723 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:47:38,725 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:47:38,725 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:47:38,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:47:38,743 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:47:38,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 258 transitions, 576 flow [2023-08-24 12:47:38,817 INFO L124 PetriNetUnfolderBase]: 181/1018 cut-off events. [2023-08-24 12:47:38,817 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:47:38,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 1018 events. 181/1018 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4746 event pairs, 23 based on Foata normal form. 0/847 useless extension candidates. Maximal degree in co-relation 707. Up to 80 conditions per place. [2023-08-24 12:47:38,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 258 transitions, 576 flow [2023-08-24 12:47:38,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 258 transitions, 576 flow [2023-08-24 12:47:38,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:47:38,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 258 transitions, 576 flow [2023-08-24 12:47:38,831 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 258 transitions, 576 flow [2023-08-24 12:47:38,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 258 transitions, 576 flow [2023-08-24 12:47:39,063 INFO L124 PetriNetUnfolderBase]: 181/1018 cut-off events. [2023-08-24 12:47:39,064 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:47:39,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 1018 events. 181/1018 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4746 event pairs, 23 based on Foata normal form. 0/847 useless extension candidates. Maximal degree in co-relation 707. Up to 80 conditions per place. [2023-08-24 12:47:39,086 INFO L119 LiptonReduction]: Number of co-enabled transitions 41850 [2023-08-24 12:47:40,472 INFO L134 LiptonReduction]: Checked pairs total: 150322 [2023-08-24 12:47:40,472 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-24 12:47:40,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:47:40,490 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;@33fc6379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:47:40,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:47:40,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:47:40,491 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-08-24 12:47:40,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:47:40,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:47:40,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 12:47:40,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:47:40,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:47:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1999624267, now seen corresponding path program 1 times [2023-08-24 12:47:40,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:47:40,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647992855] [2023-08-24 12:47:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:47:40,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:47:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:47:40,527 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 12:47:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:47:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647992855] [2023-08-24 12:47:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647992855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:47:40,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:47:40,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:47:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988791932] [2023-08-24 12:47:40,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:47:40,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:47:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:47:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:47:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:47:40,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 410 [2023-08-24 12:47:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 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 12:47:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:47:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 410 [2023-08-24 12:47:40,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand