/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_36-indirect_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:42:30,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:42:30,560 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 12:42:30,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:42:30,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:42:30,591 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:42:30,591 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:42:30,592 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:42:30,592 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:42:30,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:42:30,596 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:42:30,596 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:42:30,596 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:42:30,597 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:42:30,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:42:30,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:42:30,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:42:30,598 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:42:30,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:42:30,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:42:30,598 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:42:30,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:42:30,599 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:42:30,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:42:30,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:42:30,600 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:42:30,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:42:30,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:42:30,600 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:42:30,600 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:42:30,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:42:30,601 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:42:30,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:42:30,601 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:42:30,601 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:42:30,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:42:30,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:42:30,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:42:30,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:42:30,871 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:42:30,871 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:42:30,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-08-24 12:42:31,900 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:42:32,141 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:42:32,141 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-08-24 12:42:32,154 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3535907a6/5871b843fb434233bc7cfbd5a705a327/FLAG7d4591e30 [2023-08-24 12:42:32,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3535907a6/5871b843fb434233bc7cfbd5a705a327 [2023-08-24 12:42:32,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:42:32,168 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:42:32,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:42:32,171 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:42:32,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:42:32,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26dc36a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32, skipping insertion in model container [2023-08-24 12:42:32,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,214 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:42:32,443 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_36-indirect_racefree.i[30176,30189] [2023-08-24 12:42:32,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:42:32,463 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:42:32,481 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:42:32,482 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:42:32,492 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_36-indirect_racefree.i[30176,30189] [2023-08-24 12:42:32,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:42:32,528 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:42:32,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32 WrapperNode [2023-08-24 12:42:32,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:42:32,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:42:32,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:42:32,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:42:32,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,558 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,571 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2023-08-24 12:42:32,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:42:32,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:42:32,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:42:32,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:42:32,576 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,578 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:42:32,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:42:32,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:42:32,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:42:32,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (1/1) ... [2023-08-24 12:42:32,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:42:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:42:32,639 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 12:42:32,641 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 12:42:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:42:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:42:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:42:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:42:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:42:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:42:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:42:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:42:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:42:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:42:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:42:32,667 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 12:42:32,755 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:42:32,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:42:32,876 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:42:32,881 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:42:32,881 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 12:42:32,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:42:32 BoogieIcfgContainer [2023-08-24 12:42:32,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:42:32,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:42:32,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:42:32,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:42:32,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:42:32" (1/3) ... [2023-08-24 12:42:32,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3890fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:42:32, skipping insertion in model container [2023-08-24 12:42:32,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:42:32" (2/3) ... [2023-08-24 12:42:32,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3890fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:42:32, skipping insertion in model container [2023-08-24 12:42:32,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:42:32" (3/3) ... [2023-08-24 12:42:32,887 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2023-08-24 12:42:32,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:42:32,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:42:32,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:42:32,961 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:42:32,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 113 transitions, 234 flow [2023-08-24 12:42:33,063 INFO L124 PetriNetUnfolderBase]: 17/150 cut-off events. [2023-08-24 12:42:33,064 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:42:33,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 356 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-24 12:42:33,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 113 transitions, 234 flow [2023-08-24 12:42:33,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:33,076 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:33,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:33,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:33,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:33,131 INFO L124 PetriNetUnfolderBase]: 16/145 cut-off events. [2023-08-24 12:42:33,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:33,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 16/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 341 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-24 12:42:33,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 2752 [2023-08-24 12:42:35,544 INFO L134 LiptonReduction]: Checked pairs total: 4924 [2023-08-24 12:42:35,544 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-24 12:42:35,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:42:35,556 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:35,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:35,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:35,559 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-24 12:42:35,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:35,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:35,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:42:35,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:35,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash 13311391, now seen corresponding path program 1 times [2023-08-24 12:42:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:35,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243093016] [2023-08-24 12:42:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:35,723 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 12:42:35,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:35,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243093016] [2023-08-24 12:42:35,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243093016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:42:35,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:42:35,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:42:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81275435] [2023-08-24 12:42:35,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:42:35,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:42:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:42:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:42:35,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 204 [2023-08-24 12:42:35,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 12:42:35,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:35,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 204 [2023-08-24 12:42:35,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:35,836 INFO L124 PetriNetUnfolderBase]: 80/188 cut-off events. [2023-08-24 12:42:35,837 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:35,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 641 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-08-24 12:42:35,839 INFO L140 encePairwiseOnDemand]: 192/204 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-24 12:42:35,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-24 12:42:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:42:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:42:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-24 12:42:35,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2023-08-24 12:42:35,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-24 12:42:35,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-24 12:42:35,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:35,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-24 12:42:35,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 12:42:35,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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 12:42:35,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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 12:42:35,872 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 320 transitions. [2023-08-24 12:42:35,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-24 12:42:35,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:42:35,875 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-08-24 12:42:35,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-24 12:42:35,879 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-24 12:42:35,879 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-08-24 12:42:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 12:42:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:35,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:42:35,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:42:35,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:35,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1046035041, now seen corresponding path program 1 times [2023-08-24 12:42:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201194120] [2023-08-24 12:42:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:35,993 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 12:42:35,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:35,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201194120] [2023-08-24 12:42:35,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201194120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:42:35,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046800614] [2023-08-24 12:42:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:35,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:42:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:42:35,999 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 12:42:36,037 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 12:42:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:36,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:42:36,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:42:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:42:36,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:42:36,166 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 12:42:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046800614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:42:36,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:42:36,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:42:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055869071] [2023-08-24 12:42:36,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:42:36,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:42:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:42:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:42:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 204 [2023-08-24 12:42:36,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 93.28571428571429) internal successors, (653), 7 states have internal predecessors, (653), 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 12:42:36,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:36,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 204 [2023-08-24 12:42:36,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:36,207 INFO L124 PetriNetUnfolderBase]: 20/56 cut-off events. [2023-08-24 12:42:36,207 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:36,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 56 events. 20/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 9 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 127. Up to 42 conditions per place. [2023-08-24 12:42:36,209 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-24 12:42:36,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 111 flow [2023-08-24 12:42:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:42:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:42:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-08-24 12:42:36,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2023-08-24 12:42:36,211 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-08-24 12:42:36,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-08-24 12:42:36,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:36,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-08-24 12:42:36,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 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 12:42:36,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 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 12:42:36,217 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 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 12:42:36,219 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 390 transitions. [2023-08-24 12:42:36,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 111 flow [2023-08-24 12:42:36,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:42:36,224 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-24 12:42:36,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-24 12:42:36,225 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-24 12:42:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-24 12:42:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.28571428571429) internal successors, (653), 7 states have internal predecessors, (653), 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 12:42:36,227 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:42:36,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 12:42:36,432 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 12:42:36,433 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:42:36,436 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:42:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 113 transitions, 234 flow [2023-08-24 12:42:36,456 INFO L124 PetriNetUnfolderBase]: 17/150 cut-off events. [2023-08-24 12:42:36,456 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:42:36,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 356 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-24 12:42:36,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 113 transitions, 234 flow [2023-08-24 12:42:36,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:36,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:36,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:36,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:36,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 108 transitions, 221 flow [2023-08-24 12:42:36,472 INFO L124 PetriNetUnfolderBase]: 16/145 cut-off events. [2023-08-24 12:42:36,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:36,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 16/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 341 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-24 12:42:36,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 2752 [2023-08-24 12:42:38,613 INFO L134 LiptonReduction]: Checked pairs total: 4924 [2023-08-24 12:42:38,614 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-24 12:42:38,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:42:38,616 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:38,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:38,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:38,618 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-08-24 12:42:38,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:38,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:38,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:42:38,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:42:38,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1700229488, now seen corresponding path program 1 times [2023-08-24 12:42:38,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:38,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586764487] [2023-08-24 12:42:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:38,632 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:42:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:38,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:42:38,648 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:42:38,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:42:38,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:42:38,648 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:42:38,649 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:42:38,649 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:42:38,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:42:38,682 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:42:38,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:38,697 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-24 12:42:38,697 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:42:38,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 731 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-24 12:42:38,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:38,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:38,699 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:38,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:38,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:38,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:38,711 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-24 12:42:38,711 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:42:38,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 731 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-24 12:42:38,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 8256 [2023-08-24 12:42:40,937 INFO L134 LiptonReduction]: Checked pairs total: 18102 [2023-08-24 12:42:40,937 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-24 12:42:40,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:42:40,939 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:40,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:40,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:40,940 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 12:42:40,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:40,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:40,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:42:40,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:40,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash 25129224, now seen corresponding path program 1 times [2023-08-24 12:42:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:40,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165916864] [2023-08-24 12:42:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:40,962 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 12:42:40,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:40,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165916864] [2023-08-24 12:42:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165916864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:42:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:42:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:42:40,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382400059] [2023-08-24 12:42:40,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:42:40,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:42:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:42:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:42:40,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 259 [2023-08-24 12:42:40,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 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 12:42:40,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:40,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 259 [2023-08-24 12:42:40,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:41,134 INFO L124 PetriNetUnfolderBase]: 1642/2949 cut-off events. [2023-08-24 12:42:41,134 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:42:41,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17556 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-08-24 12:42:41,141 INFO L140 encePairwiseOnDemand]: 242/259 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-08-24 12:42:41,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-24 12:42:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:42:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:42:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-24 12:42:41,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328185328185329 [2023-08-24 12:42:41,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-24 12:42:41,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-24 12:42:41,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:41,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-24 12:42:41,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 12:42:41,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 12:42:41,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 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 12:42:41,145 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 414 transitions. [2023-08-24 12:42:41,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-24 12:42:41,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:42:41,146 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-08-24 12:42:41,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-08-24 12:42:41,147 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 12:42:41,147 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-08-24 12:42:41,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 12:42:41,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:41,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:42:41,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:42:41,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:41,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1763430539, now seen corresponding path program 1 times [2023-08-24 12:42:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:41,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443163719] [2023-08-24 12:42:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:41,177 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 12:42:41,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:41,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443163719] [2023-08-24 12:42:41,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443163719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:42:41,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039983930] [2023-08-24 12:42:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:41,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:42:41,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:42:41,178 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 12:42:41,188 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 12:42:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:41,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:42:41,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:42:41,239 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 12:42:41,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:42:41,250 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 12:42:41,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039983930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:42:41,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:42:41,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:42:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490871138] [2023-08-24 12:42:41,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:42:41,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:42:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:41,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:42:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:42:41,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 259 [2023-08-24 12:42:41,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 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 12:42:41,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:41,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 259 [2023-08-24 12:42:41,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:41,326 INFO L124 PetriNetUnfolderBase]: 376/688 cut-off events. [2023-08-24 12:42:41,326 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-24 12:42:41,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 688 events. 376/688 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3166 event pairs, 0 based on Foata normal form. 90/777 useless extension candidates. Maximal degree in co-relation 163. Up to 450 conditions per place. [2023-08-24 12:42:41,327 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-24 12:42:41,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 222 flow [2023-08-24 12:42:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:42:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:42:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-24 12:42:41,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49034749034749037 [2023-08-24 12:42:41,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-24 12:42:41,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-24 12:42:41,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:41,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-24 12:42:41,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 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 12:42:41,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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 12:42:41,332 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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 12:42:41,332 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 635 transitions. [2023-08-24 12:42:41,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 222 flow [2023-08-24 12:42:41,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:42:41,333 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-24 12:42:41,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-24 12:42:41,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-24 12:42:41,334 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-24 12:42:41,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 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 12:42:41,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:42:41,341 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 12:42:41,539 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 12:42:41,539 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:42:41,539 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:42:41,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:41,553 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-24 12:42:41,553 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:42:41,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 731 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-24 12:42:41,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:41,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:41,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:41,554 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:41,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:41,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 12:42:41,566 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-24 12:42:41,566 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:42:41,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 731 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-24 12:42:41,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 8256 [2023-08-24 12:42:43,915 INFO L134 LiptonReduction]: Checked pairs total: 18267 [2023-08-24 12:42:43,915 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-24 12:42:43,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:42:43,917 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:43,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:43,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:43,921 INFO L124 PetriNetUnfolderBase]: 12/58 cut-off events. [2023-08-24 12:42:43,921 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:42:43,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:43,921 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:42:43,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:42:43,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1187090992, now seen corresponding path program 1 times [2023-08-24 12:42:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:43,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234256557] [2023-08-24 12:42:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:43,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:43,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:42:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:43,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:42:43,944 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:42:43,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:42:43,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:42:43,944 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:42:43,945 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:42:43,945 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:42:43,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:42:43,957 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:42:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:43,984 INFO L124 PetriNetUnfolderBase]: 50/375 cut-off events. [2023-08-24 12:42:43,984 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 375 events. 50/375 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-24 12:42:43,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:43,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:43,987 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:43,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:43,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:43,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:44,008 INFO L124 PetriNetUnfolderBase]: 50/375 cut-off events. [2023-08-24 12:42:44,008 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:44,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 375 events. 50/375 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-24 12:42:44,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 15744 [2023-08-24 12:42:46,352 INFO L134 LiptonReduction]: Checked pairs total: 34246 [2023-08-24 12:42:46,352 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-24 12:42:46,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:42:46,354 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:46,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:46,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:46,355 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 12:42:46,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:42:46,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:46,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash 39198189, now seen corresponding path program 1 times [2023-08-24 12:42:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:46,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526355587] [2023-08-24 12:42:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:46,370 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 12:42:46,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:46,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526355587] [2023-08-24 12:42:46,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526355587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:42:46,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:42:46,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:42:46,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018851816] [2023-08-24 12:42:46,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:42:46,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:42:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:42:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:42:46,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 312 [2023-08-24 12:42:46,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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 12:42:46,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:46,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 312 [2023-08-24 12:42:46,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:49,256 INFO L124 PetriNetUnfolderBase]: 32280/46608 cut-off events. [2023-08-24 12:42:49,257 INFO L125 PetriNetUnfolderBase]: For 1321/1321 co-relation queries the response was YES. [2023-08-24 12:42:49,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92837 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 303465 event pairs, 21006 based on Foata normal form. 5103/47988 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-24 12:42:49,402 INFO L140 encePairwiseOnDemand]: 289/312 looper letters, 44 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-08-24 12:42:49,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-24 12:42:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:42:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:42:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-24 12:42:49,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459401709401709 [2023-08-24 12:42:49,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-24 12:42:49,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-24 12:42:49,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:49,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-24 12:42:49,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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 12:42:49,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 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 12:42:49,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 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 12:42:49,407 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 511 transitions. [2023-08-24 12:42:49,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-24 12:42:49,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:42:49,411 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-08-24 12:42:49,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-24 12:42:49,413 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-24 12:42:49,413 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-08-24 12:42:49,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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 12:42:49,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:49,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:42:49,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:42:49,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:49,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 180796324, now seen corresponding path program 1 times [2023-08-24 12:42:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:49,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732573738] [2023-08-24 12:42:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:49,463 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 12:42:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732573738] [2023-08-24 12:42:49,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732573738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:42:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452895201] [2023-08-24 12:42:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:49,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:42:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:42:49,477 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 12:42:49,505 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 12:42:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:49,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:42:49,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:42:49,568 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 12:42:49,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:42:49,582 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 12:42:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452895201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:42:49,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:42:49,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 12:42:49,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429234876] [2023-08-24 12:42:49,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:42:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 12:42:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 12:42:49,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 12:42:49,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 312 [2023-08-24 12:42:49,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 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 12:42:49,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:49,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 312 [2023-08-24 12:42:49,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:50,284 INFO L124 PetriNetUnfolderBase]: 7582/11197 cut-off events. [2023-08-24 12:42:50,285 INFO L125 PetriNetUnfolderBase]: For 1404/1404 co-relation queries the response was YES. [2023-08-24 12:42:50,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 11197 events. 7582/11197 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 65312 event pairs, 0 based on Foata normal form. 1098/12295 useless extension candidates. Maximal degree in co-relation 2698. Up to 7322 conditions per place. [2023-08-24 12:42:50,305 INFO L140 encePairwiseOnDemand]: 309/312 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-24 12:42:50,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 403 flow [2023-08-24 12:42:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:42:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:42:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-08-24 12:42:50,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085470085470085 [2023-08-24 12:42:50,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-08-24 12:42:50,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-08-24 12:42:50,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:50,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-08-24 12:42:50,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 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 12:42:50,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 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 12:42:50,311 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 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 12:42:50,311 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 952 transitions. [2023-08-24 12:42:50,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 403 flow [2023-08-24 12:42:50,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 12:42:50,316 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-24 12:42:50,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-24 12:42:50,317 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-24 12:42:50,317 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-24 12:42:50,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 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 12:42:50,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:42:50,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 12:42:50,522 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 12:42:50,522 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:42:50,523 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:42:50,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:50,550 INFO L124 PetriNetUnfolderBase]: 50/375 cut-off events. [2023-08-24 12:42:50,550 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:50,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 375 events. 50/375 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-24 12:42:50,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:50,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:50,553 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:50,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:50,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 12:42:50,574 INFO L124 PetriNetUnfolderBase]: 50/375 cut-off events. [2023-08-24 12:42:50,575 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:50,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 375 events. 50/375 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-24 12:42:50,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 15744 [2023-08-24 12:42:53,027 INFO L134 LiptonReduction]: Checked pairs total: 34546 [2023-08-24 12:42:53,027 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-24 12:42:53,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:42:53,032 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:53,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:53,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:53,037 INFO L124 PetriNetUnfolderBase]: 21/94 cut-off events. [2023-08-24 12:42:53,037 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:42:53,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:53,037 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:42:53,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:42:53,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1835890258, now seen corresponding path program 1 times [2023-08-24 12:42:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:53,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781081884] [2023-08-24 12:42:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:53,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:53,053 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:42:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:53,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:42:53,078 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:42:53,078 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:42:53,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:42:53,078 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:42:53,079 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:42:53,079 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:42:53,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:42:53,102 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:42:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 12:42:53,146 INFO L124 PetriNetUnfolderBase]: 81/572 cut-off events. [2023-08-24 12:42:53,146 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:42:53,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 572 events. 81/572 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2194 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2023-08-24 12:42:53,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 12:42:53,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 215 transitions, 474 flow [2023-08-24 12:42:53,154 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:53,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 215 transitions, 474 flow [2023-08-24 12:42:53,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 215 transitions, 474 flow [2023-08-24 12:42:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 12:42:53,193 INFO L124 PetriNetUnfolderBase]: 81/572 cut-off events. [2023-08-24 12:42:53,193 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:42:53,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 572 events. 81/572 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2194 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2023-08-24 12:42:53,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 25472 [2023-08-24 12:42:55,522 INFO L134 LiptonReduction]: Checked pairs total: 57628 [2023-08-24 12:42:55,522 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-24 12:42:55,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:42:55,523 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:55,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:55,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:55,524 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 12:42:55,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:42:55,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:55,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:42:55,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:55,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash 55483764, now seen corresponding path program 1 times [2023-08-24 12:42:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:55,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739926720] [2023-08-24 12:42:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:55,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:55,538 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 12:42:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739926720] [2023-08-24 12:42:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739926720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:42:55,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:42:55,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:42:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593760318] [2023-08-24 12:42:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:42:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:42:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:42:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:42:55,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 364 [2023-08-24 12:42:55,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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 12:42:55,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:55,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 364 [2023-08-24 12:42:55,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:43:30,856 INFO L124 PetriNetUnfolderBase]: 411276/560849 cut-off events. [2023-08-24 12:43:30,857 INFO L125 PetriNetUnfolderBase]: For 20805/20805 co-relation queries the response was YES. [2023-08-24 12:43:31,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107553 conditions, 560849 events. 411276/560849 cut-off events. For 20805/20805 co-relation queries the response was YES. Maximal size of possible extension queue 10513. Compared 4242611 event pairs, 397881 based on Foata normal form. 85320/609158 useless extension candidates. Maximal degree in co-relation 93998. Up to 535317 conditions per place. [2023-08-24 12:43:32,572 INFO L140 encePairwiseOnDemand]: 335/364 looper letters, 54 selfloop transitions, 2 changer transitions 12/78 dead transitions. [2023-08-24 12:43:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-24 12:43:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:43:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:43:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2023-08-24 12:43:32,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554945054945055 [2023-08-24 12:43:32,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2023-08-24 12:43:32,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2023-08-24 12:43:32,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:43:32,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2023-08-24 12:43:32,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 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 12:43:32,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 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 12:43:32,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 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 12:43:32,577 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 606 transitions. [2023-08-24 12:43:32,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-24 12:43:32,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:43:32,582 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-08-24 12:43:32,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-08-24 12:43:32,582 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-24 12:43:32,582 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-08-24 12:43:32,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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 12:43:32,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:43:32,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:43:32,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:43:32,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:43:32,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:43:32,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1073294350, now seen corresponding path program 1 times [2023-08-24 12:43:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:43:32,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240302803] [2023-08-24 12:43:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:43:32,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:43:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:43:32,604 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 12:43:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:43:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240302803] [2023-08-24 12:43:32,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240302803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:43:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065617989] [2023-08-24 12:43:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:43:32,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:43:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:43:32,605 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 12:43:32,607 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 12:43:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:43:32,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:43:32,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:43:32,676 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 12:43:32,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:43:32,686 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 12:43:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065617989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:43:32,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:43:32,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:43:32,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483522721] [2023-08-24 12:43:32,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:43:32,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:43:32,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:43:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:43:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:43:32,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 364 [2023-08-24 12:43:32,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 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 12:43:32,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:43:32,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 364 [2023-08-24 12:43:32,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:43:46,884 INFO L124 PetriNetUnfolderBase]: 191482/255667 cut-off events. [2023-08-24 12:43:46,884 INFO L125 PetriNetUnfolderBase]: For 16300/16300 co-relation queries the response was YES. [2023-08-24 12:43:47,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528312 conditions, 255667 events. 191482/255667 cut-off events. For 16300/16300 co-relation queries the response was YES. Maximal size of possible extension queue 5403. Compared 1769964 event pairs, 7920 based on Foata normal form. 1110/256776 useless extension candidates. Maximal degree in co-relation 53961. Up to 163477 conditions per place. [2023-08-24 12:43:48,149 INFO L140 encePairwiseOnDemand]: 360/364 looper letters, 136 selfloop transitions, 5 changer transitions 1/152 dead transitions. [2023-08-24 12:43:48,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 626 flow [2023-08-24 12:43:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:43:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:43:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1159 transitions. [2023-08-24 12:43:48,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306776556776557 [2023-08-24 12:43:48,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1159 transitions. [2023-08-24 12:43:48,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1159 transitions. [2023-08-24 12:43:48,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:43:48,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1159 transitions. [2023-08-24 12:43:48,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 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 12:43:48,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 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 12:43:48,158 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 364.0) internal successors, (2548), 7 states have internal predecessors, (2548), 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 12:43:48,158 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1159 transitions. [2023-08-24 12:43:48,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 626 flow [2023-08-24 12:43:48,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 618 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 12:43:48,189 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-24 12:43:48,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-24 12:43:48,189 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-24 12:43:48,189 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-24 12:43:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 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 12:43:48,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:43:48,190 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:43:48,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 12:43:48,395 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 12:43:48,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:43:48,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:43:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1902636250, now seen corresponding path program 1 times [2023-08-24 12:43:48,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:43:48,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741101664] [2023-08-24 12:43:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:43:48,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:43:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:43:48,484 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 12:43:48,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:43:48,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741101664] [2023-08-24 12:43:48,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741101664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:43:48,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202935494] [2023-08-24 12:43:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:43:48,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:43:48,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:43:48,486 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 12:43:48,487 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 12:43:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:43:48,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:43:48,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:43:48,582 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 12:43:48,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:43:48,626 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 12:43:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202935494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:43:48,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:43:48,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 12:43:48,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409348143] [2023-08-24 12:43:48,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:43:48,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 12:43:48,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:43:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 12:43:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 12:43:48,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 364 [2023-08-24 12:43:48,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 171.6153846153846) internal successors, (2231), 13 states have internal predecessors, (2231), 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 12:43:48,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:43:48,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 364 [2023-08-24 12:43:48,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:43:53,745 INFO L124 PetriNetUnfolderBase]: 63646/89221 cut-off events. [2023-08-24 12:43:53,745 INFO L125 PetriNetUnfolderBase]: For 70140/70140 co-relation queries the response was YES. [2023-08-24 12:43:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208526 conditions, 89221 events. 63646/89221 cut-off events. For 70140/70140 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 601208 event pairs, 0 based on Foata normal form. 8910/98130 useless extension candidates. Maximal degree in co-relation 27219. Up to 40869 conditions per place. [2023-08-24 12:43:53,978 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-08-24 12:43:53,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 148 transitions, 626 flow [2023-08-24 12:43:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:43:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:43:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1322 transitions. [2023-08-24 12:43:53,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188383045525903 [2023-08-24 12:43:53,981 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1322 transitions. [2023-08-24 12:43:53,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1322 transitions. [2023-08-24 12:43:53,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:43:53,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1322 transitions. [2023-08-24 12:43:53,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.85714285714286) internal successors, (1322), 7 states have internal predecessors, (1322), 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 12:43:53,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 364.0) internal successors, (2912), 8 states have internal predecessors, (2912), 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 12:43:53,987 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 364.0) internal successors, (2912), 8 states have internal predecessors, (2912), 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 12:43:53,987 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1322 transitions. [2023-08-24 12:43:53,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 148 transitions, 626 flow [2023-08-24 12:43:54,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 148 transitions, 607 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 12:43:54,154 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-24 12:43:54,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-24 12:43:54,155 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-08-24 12:43:54,155 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-24 12:43:54,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.6153846153846) internal successors, (2231), 13 states have internal predecessors, (2231), 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 12:43:54,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:43:54,175 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 12:43:54,360 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 12:43:54,361 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:43:54,361 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:43:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 12:43:54,396 INFO L124 PetriNetUnfolderBase]: 81/572 cut-off events. [2023-08-24 12:43:54,396 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:43:54,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 572 events. 81/572 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2194 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2023-08-24 12:43:54,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 12:43:54,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 215 transitions, 474 flow [2023-08-24 12:43:54,400 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:43:54,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 215 transitions, 474 flow [2023-08-24 12:43:54,401 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 215 transitions, 474 flow [2023-08-24 12:43:54,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 12:43:54,434 INFO L124 PetriNetUnfolderBase]: 81/572 cut-off events. [2023-08-24 12:43:54,435 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:43:54,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 572 events. 81/572 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2194 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2023-08-24 12:43:54,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 25472 [2023-08-24 12:43:56,445 INFO L134 LiptonReduction]: Checked pairs total: 58098 [2023-08-24 12:43:56,445 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-24 12:43:56,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:43:56,448 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:43:56,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:43:56,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:43:56,454 INFO L124 PetriNetUnfolderBase]: 31/133 cut-off events. [2023-08-24 12:43:56,454 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 12:43:56,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:43:56,454 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:43:56,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:43:56,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:43:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2037257991, now seen corresponding path program 1 times [2023-08-24 12:43:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:43:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434492392] [2023-08-24 12:43:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:43:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:43:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:43:56,620 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:43:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:43:56,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:43:56,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:43:56,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:43:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 12:43:56,636 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:43:56,638 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:43:56,638 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:43:56,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:43:56,661 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:43:56,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 249 transitions, 558 flow [2023-08-24 12:43:56,741 INFO L124 PetriNetUnfolderBase]: 140/909 cut-off events. [2023-08-24 12:43:56,741 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:43:56,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 909 events. 140/909 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4087 event pairs, 23 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 617. Up to 80 conditions per place. [2023-08-24 12:43:56,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 249 transitions, 558 flow [2023-08-24 12:43:56,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 249 transitions, 558 flow [2023-08-24 12:43:56,756 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:43:56,756 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 249 transitions, 558 flow [2023-08-24 12:43:56,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 249 transitions, 558 flow [2023-08-24 12:43:56,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 249 transitions, 558 flow [2023-08-24 12:43:56,831 INFO L124 PetriNetUnfolderBase]: 140/909 cut-off events. [2023-08-24 12:43:56,831 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:43:56,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 909 events. 140/909 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4087 event pairs, 23 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 617. Up to 80 conditions per place. [2023-08-24 12:43:56,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 37440 [2023-08-24 12:43:58,742 INFO L134 LiptonReduction]: Checked pairs total: 101070 [2023-08-24 12:43:58,742 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-24 12:43:58,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:43:58,743 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;@37bde94f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:43:58,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:43:58,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:43:58,744 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 12:43:58,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:43:58,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:43:58,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:43:58,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:43:58,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:43:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 74074423, now seen corresponding path program 1 times [2023-08-24 12:43:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:43:58,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218520893] [2023-08-24 12:43:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:43:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:43:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:43:58,783 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 12:43:58,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:43:58,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218520893] [2023-08-24 12:43:58,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218520893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:43:58,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:43:58,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:43:58,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111507615] [2023-08-24 12:43:58,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:43:58,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:43:58,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:43:58,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:43:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:43:58,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 419 [2023-08-24 12:43:58,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 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 12:43:58,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:43:58,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 419 [2023-08-24 12:43:58,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand