/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_19-callback_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:39:50,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:39:50,623 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 12:39:50,626 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:39:50,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:39:50,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:39:50,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:39:50,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:39:50,654 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:39:50,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:39:50,657 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:39:50,657 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:39:50,657 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:39:50,658 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:39:50,658 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:39:50,658 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:39:50,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:39:50,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:39:50,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:39:50,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:39:50,659 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:39:50,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:39:50,660 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:39:50,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:39:50,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:39:50,661 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:39:50,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:39:50,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:39:50,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:39:50,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:39:50,662 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:39:50,662 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:39:50,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:39:50,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:39:50,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:39:50,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:39:50,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:39:50,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:39:50,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:39:50,932 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:39:50,933 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:39:50,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-24 12:39:51,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:39:52,092 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:39:52,093 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-24 12:39:52,112 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c223640d7/58cdd0e316854e98879a386f4fc26ac6/FLAG346e208ec [2023-08-24 12:39:52,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c223640d7/58cdd0e316854e98879a386f4fc26ac6 [2023-08-24 12:39:52,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:39:52,128 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:39:52,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:39:52,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:39:52,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:39:52,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4763aaa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52, skipping insertion in model container [2023-08-24 12:39:52,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,171 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:39:52,415 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_19-callback_racing.i[30212,30225] [2023-08-24 12:39:52,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:39:52,441 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:39:52,465 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-24 12:39:52,466 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-24 12:39:52,480 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_19-callback_racing.i[30212,30225] [2023-08-24 12:39:52,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:39:52,512 WARN L669 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 12:39:52,517 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:39:52,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52 WrapperNode [2023-08-24 12:39:52,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:39:52,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:39:52,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:39:52,519 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:39:52,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,564 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2023-08-24 12:39:52,564 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:39:52,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:39:52,565 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:39:52,565 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:39:52,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,576 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:39:52,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:39:52,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:39:52,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:39:52,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (1/1) ... [2023-08-24 12:39:52,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:39:52,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:39:52,610 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 12:39:52,616 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 12:39:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:39:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:39:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:39:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:39:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:39:52,638 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 12:39:52,723 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:39:52,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:39:52,857 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:39:52,862 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:39:52,862 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-24 12:39:52,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:39:52 BoogieIcfgContainer [2023-08-24 12:39:52,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:39:52,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:39:52,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:39:52,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:39:52,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:39:52" (1/3) ... [2023-08-24 12:39:52,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44eb278c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:39:52, skipping insertion in model container [2023-08-24 12:39:52,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:52" (2/3) ... [2023-08-24 12:39:52,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44eb278c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:39:52, skipping insertion in model container [2023-08-24 12:39:52,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:39:52" (3/3) ... [2023-08-24 12:39:52,868 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-24 12:39:52,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:39:52,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:39:52,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:39:52,930 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:39:52,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 138 transitions, 284 flow [2023-08-24 12:39:53,028 INFO L124 PetriNetUnfolderBase]: 26/211 cut-off events. [2023-08-24 12:39:53,028 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:39:53,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 211 events. 26/211 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 556 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-24 12:39:53,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 138 transitions, 284 flow [2023-08-24 12:39:53,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:53,038 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:53,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:53,045 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:53,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:53,092 INFO L124 PetriNetUnfolderBase]: 25/206 cut-off events. [2023-08-24 12:39:53,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:53,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 206 events. 25/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 508 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-24 12:39:53,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-24 12:39:55,758 INFO L134 LiptonReduction]: Checked pairs total: 4509 [2023-08-24 12:39:55,759 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-24 12:39:55,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:39:55,771 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:39:55,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 12:39:55,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:39:55,774 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2023-08-24 12:39:55,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:55,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:55,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 12:39:55,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:39:55,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1904621692, now seen corresponding path program 1 times [2023-08-24 12:39:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:55,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679481736] [2023-08-24 12:39:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:55,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:55,972 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 12:39:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:39:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679481736] [2023-08-24 12:39:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679481736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:39:55,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:39:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:39:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328646435] [2023-08-24 12:39:55,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:39:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:39:55,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:39:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:39:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:39:56,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 260 [2023-08-24 12:39:56,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 12:39:56,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:39:56,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 260 [2023-08-24 12:39:56,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:39:56,081 INFO L124 PetriNetUnfolderBase]: 88/207 cut-off events. [2023-08-24 12:39:56,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:56,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 207 events. 88/207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 32 based on Foata normal form. 29/194 useless extension candidates. Maximal degree in co-relation 356. Up to 122 conditions per place. [2023-08-24 12:39:56,085 INFO L140 encePairwiseOnDemand]: 248/260 looper letters, 20 selfloop transitions, 2 changer transitions 8/32 dead transitions. [2023-08-24 12:39:56,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 127 flow [2023-08-24 12:39:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:39:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:39:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-24 12:39:56,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2023-08-24 12:39:56,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-24 12:39:56,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-24 12:39:56,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:39:56,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-24 12:39:56,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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 12:39:56,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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 12:39:56,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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 12:39:56,114 INFO L175 Difference]: Start difference. First operand has 25 places, 32 transitions, 69 flow. Second operand 3 states and 395 transitions. [2023-08-24 12:39:56,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 127 flow [2023-08-24 12:39:56,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:39:56,118 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 53 flow [2023-08-24 12:39:56,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-24 12:39:56,121 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-24 12:39:56,121 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 53 flow [2023-08-24 12:39:56,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 12:39:56,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:56,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:39:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:39:56,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:39:56,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1793541592, now seen corresponding path program 1 times [2023-08-24 12:39:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367957706] [2023-08-24 12:39:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:56,221 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 12:39:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:39:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367957706] [2023-08-24 12:39:56,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367957706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:39:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791876669] [2023-08-24 12:39:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:56,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:39:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:39:56,225 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 12:39:56,226 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 12:39:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:56,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:39:56,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:39:56,339 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 12:39:56,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:39:56,367 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 12:39:56,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791876669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:39:56,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:39:56,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:39:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437332455] [2023-08-24 12:39:56,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:39:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:39:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:39:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:39:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:39:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 260 [2023-08-24 12:39:56,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 53 flow. Second operand has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 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 12:39:56,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:39:56,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 260 [2023-08-24 12:39:56,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:39:56,384 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-24 12:39:56,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:56,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 21. Up to 6 conditions per place. [2023-08-24 12:39:56,385 INFO L140 encePairwiseOnDemand]: 257/260 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-24 12:39:56,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 36 flow [2023-08-24 12:39:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:39:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:39:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-24 12:39:56,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45096153846153847 [2023-08-24 12:39:56,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-24 12:39:56,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-24 12:39:56,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:39:56,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-24 12:39:56,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:39:56,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:39:56,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:39:56,389 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 53 flow. Second operand 4 states and 469 transitions. [2023-08-24 12:39:56,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 36 flow [2023-08-24 12:39:56,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 12:39:56,389 INFO L231 Difference]: Finished difference. Result has 13 places, 0 transitions, 0 flow [2023-08-24 12:39:56,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=13, PETRI_TRANSITIONS=0} [2023-08-24 12:39:56,390 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -12 predicate places. [2023-08-24 12:39:56,390 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 0 transitions, 0 flow [2023-08-24 12:39:56,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 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 12:39:56,392 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-24 12:39:56,392 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 12:39:56,402 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 12:39:56,597 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 12:39:56,598 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:39:56,599 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-24 12:39:56,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 138 transitions, 284 flow [2023-08-24 12:39:56,613 INFO L124 PetriNetUnfolderBase]: 26/211 cut-off events. [2023-08-24 12:39:56,613 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:39:56,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 211 events. 26/211 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 556 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-24 12:39:56,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 138 transitions, 284 flow [2023-08-24 12:39:56,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:56,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:56,614 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:56,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:56,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 271 flow [2023-08-24 12:39:56,623 INFO L124 PetriNetUnfolderBase]: 25/206 cut-off events. [2023-08-24 12:39:56,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:56,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 206 events. 25/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 508 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2023-08-24 12:39:56,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-24 12:39:59,039 INFO L134 LiptonReduction]: Checked pairs total: 4437 [2023-08-24 12:39:59,039 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-24 12:39:59,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:39:59,041 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:39:59,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:39:59,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:39:59,043 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2023-08-24 12:39:59,043 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:59,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:59,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:39:59,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:39:59,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1731422577, now seen corresponding path program 1 times [2023-08-24 12:39:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:59,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170223711] [2023-08-24 12:39:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:39:59,070 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:39:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:39:59,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:39:59,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:39:59,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:39:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:39:59,086 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:39:59,087 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:39:59,087 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:39:59,087 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:39:59,096 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:39:59,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-08-24 12:39:59,116 INFO L124 PetriNetUnfolderBase]: 43/331 cut-off events. [2023-08-24 12:39:59,117 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:39:59,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 331 events. 43/331 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1162 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 213. Up to 9 conditions per place. [2023-08-24 12:39:59,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 160 transitions, 338 flow [2023-08-24 12:39:59,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 160 transitions, 338 flow [2023-08-24 12:39:59,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:59,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 160 transitions, 338 flow [2023-08-24 12:39:59,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 160 transitions, 338 flow [2023-08-24 12:39:59,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-08-24 12:39:59,142 INFO L124 PetriNetUnfolderBase]: 43/331 cut-off events. [2023-08-24 12:39:59,142 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:39:59,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 331 events. 43/331 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1162 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 213. Up to 9 conditions per place. [2023-08-24 12:39:59,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-24 12:40:01,696 INFO L134 LiptonReduction]: Checked pairs total: 12397 [2023-08-24 12:40:01,696 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-24 12:40:01,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:40:01,698 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:01,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 12:40:01,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:01,700 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 12:40:01,700 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:40:01,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:01,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 12:40:01,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:40:01,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1742801259, now seen corresponding path program 1 times [2023-08-24 12:40:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394624075] [2023-08-24 12:40:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:01,764 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 12:40:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:01,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394624075] [2023-08-24 12:40:01,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394624075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:40:01,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:40:01,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:40:01,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862838603] [2023-08-24 12:40:01,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:40:01,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:40:01,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:40:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:40:01,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 296 [2023-08-24 12:40:01,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 12:40:01,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:01,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 296 [2023-08-24 12:40:01,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:01,976 INFO L124 PetriNetUnfolderBase]: 1919/3175 cut-off events. [2023-08-24 12:40:01,976 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-24 12:40:01,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6326 conditions, 3175 events. 1919/3175 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 15900 event pairs, 823 based on Foata normal form. 197/2721 useless extension candidates. Maximal degree in co-relation 2292. Up to 2046 conditions per place. [2023-08-24 12:40:01,985 INFO L140 encePairwiseOnDemand]: 280/296 looper letters, 46 selfloop transitions, 2 changer transitions 7/58 dead transitions. [2023-08-24 12:40:01,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 248 flow [2023-08-24 12:40:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:40:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:40:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-24 12:40:01,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-24 12:40:01,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-24 12:40:01,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-24 12:40:01,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:01,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-24 12:40:01,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 12:40:01,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 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 12:40:01,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 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 12:40:01,990 INFO L175 Difference]: Start difference. First operand has 39 places, 49 transitions, 116 flow. Second operand 3 states and 470 transitions. [2023-08-24 12:40:01,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 248 flow [2023-08-24 12:40:01,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:40:01,993 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 104 flow [2023-08-24 12:40:01,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-24 12:40:01,997 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-24 12:40:01,997 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 104 flow [2023-08-24 12:40:02,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 12:40:02,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:02,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:02,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:40:02,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:40:02,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash 286234597, now seen corresponding path program 1 times [2023-08-24 12:40:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:02,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981790977] [2023-08-24 12:40:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:02,053 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 12:40:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981790977] [2023-08-24 12:40:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981790977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:40:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61374840] [2023-08-24 12:40:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:40:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:40:02,055 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 12:40:02,057 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 12:40:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:02,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:40:02,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:40:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:40:02,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:40:02,153 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 12:40:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61374840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:40:02,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:40:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:40:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874409272] [2023-08-24 12:40:02,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:40:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:40:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:40:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:40:02,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 296 [2023-08-24 12:40:02,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 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 12:40:02,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:02,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 296 [2023-08-24 12:40:02,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:02,212 INFO L124 PetriNetUnfolderBase]: 160/295 cut-off events. [2023-08-24 12:40:02,212 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:40:02,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 295 events. 160/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1012 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 601. Up to 192 conditions per place. [2023-08-24 12:40:02,213 INFO L140 encePairwiseOnDemand]: 293/296 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-24 12:40:02,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 145 flow [2023-08-24 12:40:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:40:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:40:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 691 transitions. [2023-08-24 12:40:02,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668918918918919 [2023-08-24 12:40:02,214 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 691 transitions. [2023-08-24 12:40:02,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 691 transitions. [2023-08-24 12:40:02,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:02,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 691 transitions. [2023-08-24 12:40:02,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 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 12:40:02,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 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 12:40:02,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 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 12:40:02,218 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 104 flow. Second operand 5 states and 691 transitions. [2023-08-24 12:40:02,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 145 flow [2023-08-24 12:40:02,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 143 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 12:40:02,219 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-24 12:40:02,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-24 12:40:02,221 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -13 predicate places. [2023-08-24 12:40:02,222 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-24 12:40:02,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 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 12:40:02,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 12:40:02,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-24 12:40:02,223 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-24 12:40:02,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 12:40:02,428 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 12:40:02,431 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:40:02,431 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-24 12:40:02,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-08-24 12:40:02,450 INFO L124 PetriNetUnfolderBase]: 43/331 cut-off events. [2023-08-24 12:40:02,451 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:40:02,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 331 events. 43/331 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1162 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 213. Up to 9 conditions per place. [2023-08-24 12:40:02,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 160 transitions, 338 flow [2023-08-24 12:40:02,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 160 transitions, 338 flow [2023-08-24 12:40:02,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:02,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 160 transitions, 338 flow [2023-08-24 12:40:02,455 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 160 transitions, 338 flow [2023-08-24 12:40:02,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-08-24 12:40:02,468 INFO L124 PetriNetUnfolderBase]: 43/331 cut-off events. [2023-08-24 12:40:02,468 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:40:02,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 331 events. 43/331 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1162 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 213. Up to 9 conditions per place. [2023-08-24 12:40:02,472 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-24 12:40:05,026 INFO L134 LiptonReduction]: Checked pairs total: 12031 [2023-08-24 12:40:05,026 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-24 12:40:05,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:40:05,028 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:05,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:05,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:05,031 INFO L124 PetriNetUnfolderBase]: 18/63 cut-off events. [2023-08-24 12:40:05,031 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:40:05,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:05,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:40:05,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:40:05,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash -768093957, now seen corresponding path program 1 times [2023-08-24 12:40:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:05,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986105816] [2023-08-24 12:40:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:05,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:40:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:05,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:40:05,070 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:40:05,070 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:40:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:40:05,070 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:40:05,071 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:40:05,071 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:40:05,071 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:40:05,084 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:40:05,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:05,111 INFO L124 PetriNetUnfolderBase]: 65/484 cut-off events. [2023-08-24 12:40:05,111 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:05,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 65/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1892 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-24 12:40:05,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:05,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:05,114 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:05,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:05,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:05,143 INFO L124 PetriNetUnfolderBase]: 65/484 cut-off events. [2023-08-24 12:40:05,144 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:05,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 65/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1892 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-24 12:40:05,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 12720 [2023-08-24 12:40:07,756 INFO L134 LiptonReduction]: Checked pairs total: 21116 [2023-08-24 12:40:07,756 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-24 12:40:07,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:40:07,759 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:07,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 12:40:07,761 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:07,761 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 12:40:07,761 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:40:07,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:07,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 12:40:07,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:40:07,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash 191058300, now seen corresponding path program 1 times [2023-08-24 12:40:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:07,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061291457] [2023-08-24 12:40:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:07,803 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 12:40:07,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:07,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061291457] [2023-08-24 12:40:07,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061291457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:40:07,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:40:07,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:40:07,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503278011] [2023-08-24 12:40:07,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:40:07,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:40:07,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:40:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:40:07,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 340 [2023-08-24 12:40:07,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 61 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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 12:40:07,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:07,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 340 [2023-08-24 12:40:07,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:08,997 INFO L124 PetriNetUnfolderBase]: 15543/22667 cut-off events. [2023-08-24 12:40:08,997 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2023-08-24 12:40:09,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 22667 events. 15543/22667 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 137383 event pairs, 6456 based on Foata normal form. 1640/20475 useless extension candidates. Maximal degree in co-relation 5826. Up to 14692 conditions per place. [2023-08-24 12:40:09,072 INFO L140 encePairwiseOnDemand]: 321/340 looper letters, 56 selfloop transitions, 2 changer transitions 8/70 dead transitions. [2023-08-24 12:40:09,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 309 flow [2023-08-24 12:40:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:40:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:40:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-24 12:40:09,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225490196078432 [2023-08-24 12:40:09,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-24 12:40:09,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-24 12:40:09,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:09,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-24 12:40:09,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 12:40:09,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 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 12:40:09,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 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 12:40:09,077 INFO L175 Difference]: Start difference. First operand has 49 places, 61 transitions, 152 flow. Second operand 3 states and 533 transitions. [2023-08-24 12:40:09,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 309 flow [2023-08-24 12:40:09,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:40:09,080 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 128 flow [2023-08-24 12:40:09,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=340, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-24 12:40:09,081 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-24 12:40:09,081 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 128 flow [2023-08-24 12:40:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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 12:40:09,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:09,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:09,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:40:09,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:40:09,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1400979679, now seen corresponding path program 1 times [2023-08-24 12:40:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41984221] [2023-08-24 12:40:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:09,141 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 12:40:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:09,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41984221] [2023-08-24 12:40:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41984221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:40:09,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089221684] [2023-08-24 12:40:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:09,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:40:09,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:40:09,143 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 12:40:09,145 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 12:40:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:09,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:40:09,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:40:09,258 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 12:40:09,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:40:09,273 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 12:40:09,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089221684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:40:09,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:40:09,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:40:09,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636875742] [2023-08-24 12:40:09,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:40:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:40:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:40:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:40:09,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 340 [2023-08-24 12:40:09,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 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 12:40:09,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:09,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 340 [2023-08-24 12:40:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:09,402 INFO L124 PetriNetUnfolderBase]: 1312/1996 cut-off events. [2023-08-24 12:40:09,402 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-08-24 12:40:09,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4100 conditions, 1996 events. 1312/1996 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9046 event pairs, 0 based on Foata normal form. 0/1996 useless extension candidates. Maximal degree in co-relation 4090. Up to 1248 conditions per place. [2023-08-24 12:40:09,405 INFO L140 encePairwiseOnDemand]: 337/340 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-24 12:40:09,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 230 flow [2023-08-24 12:40:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:40:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:40:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-08-24 12:40:09,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598039215686274 [2023-08-24 12:40:09,407 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-08-24 12:40:09,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-08-24 12:40:09,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:09,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-08-24 12:40:09,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 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 12:40:09,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 340.0) internal successors, (2380), 7 states have internal predecessors, (2380), 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 12:40:09,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 340.0) internal successors, (2380), 7 states have internal predecessors, (2380), 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 12:40:09,411 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 128 flow. Second operand 6 states and 938 transitions. [2023-08-24 12:40:09,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 230 flow [2023-08-24 12:40:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 54 transitions, 226 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 12:40:09,413 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-24 12:40:09,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=340, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-24 12:40:09,415 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -14 predicate places. [2023-08-24 12:40:09,415 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-24 12:40:09,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 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 12:40:09,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 12:40:09,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 12:40:09,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 12:40:09,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 12:40:09,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 12:40:09,620 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 12:40:09,621 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:40:09,621 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-24 12:40:09,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:09,646 INFO L124 PetriNetUnfolderBase]: 65/484 cut-off events. [2023-08-24 12:40:09,646 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:09,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 65/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1892 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-24 12:40:09,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:09,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:09,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:09,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:09,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 182 transitions, 394 flow [2023-08-24 12:40:09,670 INFO L124 PetriNetUnfolderBase]: 65/484 cut-off events. [2023-08-24 12:40:09,670 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 65/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1892 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-24 12:40:09,676 INFO L119 LiptonReduction]: Number of co-enabled transitions 12720 [2023-08-24 12:40:12,326 INFO L134 LiptonReduction]: Checked pairs total: 20966 [2023-08-24 12:40:12,326 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-24 12:40:12,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:40:12,328 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:12,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:12,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:12,332 INFO L124 PetriNetUnfolderBase]: 31/103 cut-off events. [2023-08-24 12:40:12,332 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:40:12,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:12,332 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:40:12,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:40:12,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1414277752, now seen corresponding path program 1 times [2023-08-24 12:40:12,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:12,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691268276] [2023-08-24 12:40:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:12,344 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:40:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:12,351 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:40:12,351 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:40:12,351 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:40:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:40:12,351 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:40:12,352 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:40:12,352 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:40:12,352 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:40:12,362 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:40:12,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:12,423 INFO L124 PetriNetUnfolderBase]: 99/705 cut-off events. [2023-08-24 12:40:12,424 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:40:12,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 705 events. 99/705 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3073 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 504. Up to 32 conditions per place. [2023-08-24 12:40:12,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:12,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:12,428 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:12,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:12,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:12,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:12,461 INFO L124 PetriNetUnfolderBase]: 99/705 cut-off events. [2023-08-24 12:40:12,462 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:40:12,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 705 events. 99/705 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3073 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 504. Up to 32 conditions per place. [2023-08-24 12:40:12,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 18800 [2023-08-24 12:40:15,070 INFO L134 LiptonReduction]: Checked pairs total: 33683 [2023-08-24 12:40:15,070 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-24 12:40:15,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:40:15,071 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:15,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 12:40:15,073 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:15,073 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 12:40:15,073 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:40:15,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:15,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 12:40:15,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:40:15,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash -572335231, now seen corresponding path program 1 times [2023-08-24 12:40:15,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:15,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784895624] [2023-08-24 12:40:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:15,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:15,101 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 12:40:15,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784895624] [2023-08-24 12:40:15,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784895624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:40:15,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:40:15,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:40:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054404852] [2023-08-24 12:40:15,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:40:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:40:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:40:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:40:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 376 [2023-08-24 12:40:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 73 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 12:40:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 376 [2023-08-24 12:40:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:25,203 INFO L124 PetriNetUnfolderBase]: 147280/204085 cut-off events. [2023-08-24 12:40:25,203 INFO L125 PetriNetUnfolderBase]: For 7982/7982 co-relation queries the response was YES. [2023-08-24 12:40:25,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405224 conditions, 204085 events. 147280/204085 cut-off events. For 7982/7982 co-relation queries the response was YES. Maximal size of possible extension queue 5842. Compared 1489212 event pairs, 66377 based on Foata normal form. 27679/191825 useless extension candidates. Maximal degree in co-relation 52838. Up to 129201 conditions per place. [2023-08-24 12:40:26,128 INFO L140 encePairwiseOnDemand]: 349/376 looper letters, 78 selfloop transitions, 4 changer transitions 1/89 dead transitions. [2023-08-24 12:40:26,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 398 flow [2023-08-24 12:40:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:40:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:40:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-24 12:40:26,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381205673758865 [2023-08-24 12:40:26,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-24 12:40:26,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-24 12:40:26,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:26,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-24 12:40:26,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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 12:40:26,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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 12:40:26,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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 12:40:26,133 INFO L175 Difference]: Start difference. First operand has 59 places, 73 transitions, 190 flow. Second operand 3 states and 607 transitions. [2023-08-24 12:40:26,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 398 flow [2023-08-24 12:40:26,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:40:26,136 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 184 flow [2023-08-24 12:40:26,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-24 12:40:26,137 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-24 12:40:26,137 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 184 flow [2023-08-24 12:40:26,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 12:40:26,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:26,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:26,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:40:26,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:40:26,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:26,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1310472028, now seen corresponding path program 1 times [2023-08-24 12:40:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:26,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884054895] [2023-08-24 12:40:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:26,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:26,162 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 12:40:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884054895] [2023-08-24 12:40:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884054895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:40:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335577943] [2023-08-24 12:40:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:40:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:40:26,163 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 12:40:26,165 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 12:40:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:26,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:40:26,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:40:26,250 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 12:40:26,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:40:26,270 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 12:40:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335577943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:40:26,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:40:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:40:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197291371] [2023-08-24 12:40:26,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:40:26,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:40:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:40:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:40:26,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 376 [2023-08-24 12:40:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 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 12:40:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:26,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 376 [2023-08-24 12:40:26,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:35,855 INFO L124 PetriNetUnfolderBase]: 135700/187771 cut-off events. [2023-08-24 12:40:35,855 INFO L125 PetriNetUnfolderBase]: For 31626/31626 co-relation queries the response was YES. [2023-08-24 12:40:36,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414225 conditions, 187771 events. 135700/187771 cut-off events. For 31626/31626 co-relation queries the response was YES. Maximal size of possible extension queue 5515. Compared 1370628 event pairs, 27752 based on Foata normal form. 0/167626 useless extension candidates. Maximal degree in co-relation 83876. Up to 173317 conditions per place. [2023-08-24 12:40:36,631 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 97 selfloop transitions, 5 changer transitions 1/109 dead transitions. [2023-08-24 12:40:36,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 498 flow [2023-08-24 12:40:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:40:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:40:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1082 transitions. [2023-08-24 12:40:36,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796099290780142 [2023-08-24 12:40:36,634 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1082 transitions. [2023-08-24 12:40:36,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1082 transitions. [2023-08-24 12:40:36,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:36,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1082 transitions. [2023-08-24 12:40:36,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 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 12:40:36,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 376.0) internal successors, (2632), 7 states have internal predecessors, (2632), 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 12:40:36,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 376.0) internal successors, (2632), 7 states have internal predecessors, (2632), 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 12:40:36,638 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 184 flow. Second operand 6 states and 1082 transitions. [2023-08-24 12:40:36,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 498 flow [2023-08-24 12:40:36,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 109 transitions, 488 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:40:36,696 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 210 flow [2023-08-24 12:40:36,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-24 12:40:36,696 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-24 12:40:36,696 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 210 flow [2023-08-24 12:40:36,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 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 12:40:36,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:36,697 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:36,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 12:40:36,901 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 12:40:36,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:40:36,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash -467620845, now seen corresponding path program 1 times [2023-08-24 12:40:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172828503] [2023-08-24 12:40:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:36,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:36,953 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 12:40:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172828503] [2023-08-24 12:40:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172828503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:40:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174986737] [2023-08-24 12:40:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:40:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:40:36,955 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 12:40:36,956 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 12:40:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:37,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:40:37,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:40:37,073 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 12:40:37,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:40:37,126 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 12:40:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174986737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:40:37,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:40:37,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 12:40:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121611119] [2023-08-24 12:40:37,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:40:37,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 12:40:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:37,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 12:40:37,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 12:40:37,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 376 [2023-08-24 12:40:37,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 166.23076923076923) internal successors, (2161), 13 states have internal predecessors, (2161), 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 12:40:37,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:37,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 376 [2023-08-24 12:40:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:37,519 INFO L124 PetriNetUnfolderBase]: 5152/7555 cut-off events. [2023-08-24 12:40:37,519 INFO L125 PetriNetUnfolderBase]: For 6324/6324 co-relation queries the response was YES. [2023-08-24 12:40:37,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17929 conditions, 7555 events. 5152/7555 cut-off events. For 6324/6324 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 41175 event pairs, 0 based on Foata normal form. 720/8274 useless extension candidates. Maximal degree in co-relation 8744. Up to 3444 conditions per place. [2023-08-24 12:40:37,536 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-24 12:40:37,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 367 flow [2023-08-24 12:40:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:40:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:40:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-08-24 12:40:37,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623860182370821 [2023-08-24 12:40:37,538 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-08-24 12:40:37,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-08-24 12:40:37,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:37,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-08-24 12:40:37,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 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 12:40:37,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 376.0) internal successors, (3008), 8 states have internal predecessors, (3008), 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 12:40:37,543 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 376.0) internal successors, (3008), 8 states have internal predecessors, (3008), 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 12:40:37,543 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 210 flow. Second operand 7 states and 1217 transitions. [2023-08-24 12:40:37,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 367 flow [2023-08-24 12:40:37,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 342 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-24 12:40:37,553 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-24 12:40:37,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-24 12:40:37,554 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -13 predicate places. [2023-08-24 12:40:37,554 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-24 12:40:37,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 166.23076923076923) internal successors, (2161), 13 states have internal predecessors, (2161), 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 12:40:37,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-24 12:40:37,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 12:40:37,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 12:40:37,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 12:40:37,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 12:40:37,560 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 12:40:37,759 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 12:40:37,759 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:40:37,759 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-24 12:40:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:37,794 INFO L124 PetriNetUnfolderBase]: 99/705 cut-off events. [2023-08-24 12:40:37,794 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:40:37,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 705 events. 99/705 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3073 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 504. Up to 32 conditions per place. [2023-08-24 12:40:37,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:37,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:37,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:37,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:37,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:37,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 204 transitions, 452 flow [2023-08-24 12:40:37,949 INFO L124 PetriNetUnfolderBase]: 99/705 cut-off events. [2023-08-24 12:40:37,949 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:40:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 705 events. 99/705 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3073 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 504. Up to 32 conditions per place. [2023-08-24 12:40:37,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 18800 [2023-08-24 12:40:40,733 INFO L134 LiptonReduction]: Checked pairs total: 32822 [2023-08-24 12:40:40,733 INFO L136 LiptonReduction]: Total number of compositions: 175 [2023-08-24 12:40:40,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:40:40,734 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:40,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:40,741 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:40,741 INFO L124 PetriNetUnfolderBase]: 43/144 cut-off events. [2023-08-24 12:40:40,741 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 12:40:40,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:40,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:40,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:40:40,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash 816945754, now seen corresponding path program 1 times [2023-08-24 12:40:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726071501] [2023-08-24 12:40:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:40,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:40,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:40:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:40,767 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:40:40,767 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:40:40,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:40:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 12:40:40,767 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:40:40,768 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:40:40,768 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:40:40,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:40:40,795 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:40:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 512 flow [2023-08-24 12:40:40,871 INFO L124 PetriNetUnfolderBase]: 161/1066 cut-off events. [2023-08-24 12:40:40,872 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:40:40,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 1066 events. 161/1066 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5232 event pairs, 23 based on Foata normal form. 0/916 useless extension candidates. Maximal degree in co-relation 750. Up to 80 conditions per place. [2023-08-24 12:40:40,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 226 transitions, 512 flow [2023-08-24 12:40:40,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 226 transitions, 512 flow [2023-08-24 12:40:40,880 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:40,880 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 226 transitions, 512 flow [2023-08-24 12:40:40,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 226 transitions, 512 flow [2023-08-24 12:40:40,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 512 flow [2023-08-24 12:40:40,954 INFO L124 PetriNetUnfolderBase]: 161/1066 cut-off events. [2023-08-24 12:40:40,954 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:40:40,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 1066 events. 161/1066 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5232 event pairs, 23 based on Foata normal form. 0/916 useless extension candidates. Maximal degree in co-relation 750. Up to 80 conditions per place. [2023-08-24 12:40:40,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 25800 [2023-08-24 12:40:43,938 INFO L134 LiptonReduction]: Checked pairs total: 52145 [2023-08-24 12:40:43,938 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-24 12:40:43,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:40:43,949 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;@13812e75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:43,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 12:40:43,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:43,951 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2023-08-24 12:40:43,951 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:40:43,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:43,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 12:40:43,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 12:40:43,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:43,952 INFO L85 PathProgramCache]: Analyzing trace with hash 382775783, now seen corresponding path program 1 times [2023-08-24 12:40:43,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:43,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639481461] [2023-08-24 12:40:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:43,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:43,990 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 12:40:43,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:43,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639481461] [2023-08-24 12:40:43,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639481461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:40:43,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:40:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:40:43,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909239668] [2023-08-24 12:40:43,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:40:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:40:43,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:40:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:40:43,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 416 [2023-08-24 12:40:43,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 81 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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 12:40:43,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:43,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 416 [2023-08-24 12:40:43,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand