/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:43:16,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:43:16,298 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 [2023-08-23 22:43:16,302 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:43:16,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:43:16,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:43:16,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:43:16,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:43:16,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:43:16,329 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:43:16,329 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:43:16,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:43:16,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:43:16,331 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:43:16,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:43:16,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:43:16,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:43:16,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:43:16,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:43:16,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:43:16,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:43:16,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:43:16,332 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:43:16,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:43:16,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:43:16,333 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:43:16,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:43:16,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:43:16,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:43:16,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:43:16,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:43:16,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:43:16,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:43:16,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:43:16,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:43:16,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:43:16,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:43:16,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:43:16,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:43:16,606 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:43:16,606 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:43:16,607 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-23 22:43:17,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:43:17,828 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:43:17,828 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-23 22:43:17,844 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abfe9256b/5599f500dacf4e2db58b9871525a3444/FLAG84e86ba68 [2023-08-23 22:43:17,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abfe9256b/5599f500dacf4e2db58b9871525a3444 [2023-08-23 22:43:17,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:43:17,855 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:43:17,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:43:17,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:43:17,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:43:17,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:43:17" (1/1) ... [2023-08-23 22:43:17,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e13bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:17, skipping insertion in model container [2023-08-23 22:43:17,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:43:17" (1/1) ... [2023-08-23 22:43:17,894 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:43:18,154 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30534,30547] [2023-08-23 22:43:18,159 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30928,30941] [2023-08-23 22:43:18,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:43:18,174 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:43:18,198 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-23 22:43:18,199 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-23 22:43:18,210 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [689] [2023-08-23 22:43:18,212 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [700] [2023-08-23 22:43:18,212 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [701] [2023-08-23 22:43:18,212 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: inline unsigned [702] [2023-08-23 22:43:18,212 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [703] [2023-08-23 22:43:18,213 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30534,30547] [2023-08-23 22:43:18,214 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: inline unsigned [716] [2023-08-23 22:43:18,214 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [717] [2023-08-23 22:43:18,214 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30928,30941] [2023-08-23 22:43:18,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:43:18,250 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:43:18,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18 WrapperNode [2023-08-23 22:43:18,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:43:18,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:43:18,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:43:18,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:43:18,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,304 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 134 [2023-08-23 22:43:18,304 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:43:18,305 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:43:18,305 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:43:18,305 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:43:18,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,334 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,335 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:43:18,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:43:18,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:43:18,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:43:18,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (1/1) ... [2023-08-23 22:43:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:43:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:43:18,371 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) [2023-08-23 22:43:18,378 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 [2023-08-23 22:43:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:43:18,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:43:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:43:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:43:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:43:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:43:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:43:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:43:18,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:43:18,402 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:43:18,501 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:43:18,503 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:43:18,651 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:43:18,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:43:18,732 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-23 22:43:18,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:43:18 BoogieIcfgContainer [2023-08-23 22:43:18,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:43:18,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:43:18,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:43:18,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:43:18,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:43:17" (1/3) ... [2023-08-23 22:43:18,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c77ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:43:18, skipping insertion in model container [2023-08-23 22:43:18,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:18" (2/3) ... [2023-08-23 22:43:18,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c77ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:43:18, skipping insertion in model container [2023-08-23 22:43:18,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:43:18" (3/3) ... [2023-08-23 22:43:18,750 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-08-23 22:43:18,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:43:18,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-23 22:43:18,761 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:43:18,833 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:18,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 167 flow [2023-08-23 22:43:18,895 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-23 22:43:18,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:18,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-08-23 22:43:18,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 81 transitions, 167 flow [2023-08-23 22:43:18,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 81 transitions, 167 flow [2023-08-23 22:43:18,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:18,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 167 flow [2023-08-23 22:43:18,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 167 flow [2023-08-23 22:43:18,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 167 flow [2023-08-23 22:43:18,930 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-23 22:43:18,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-08-23 22:43:18,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 1378 [2023-08-23 22:43:22,453 INFO L134 LiptonReduction]: Checked pairs total: 1359 [2023-08-23 22:43:22,454 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-23 22:43:22,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:22,478 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;@e34ca73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:22,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:43:22,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:22,482 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-23 22:43:22,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:22,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:22,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 22:43:22,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:43:22,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:22,487 INFO L85 PathProgramCache]: Analyzing trace with hash 17159279, now seen corresponding path program 1 times [2023-08-23 22:43:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:22,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628831418] [2023-08-23 22:43:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:22,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:22,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628831418] [2023-08-23 22:43:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628831418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:22,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:22,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:43:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547285854] [2023-08-23 22:43:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-23 22:43:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-23 22:43:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-23 22:43:22,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 186 [2023-08-23 22:43:22,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 23 flow. Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 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) [2023-08-23 22:43:22,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:22,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 186 [2023-08-23 22:43:22,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:22,681 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-23 22:43:22,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 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 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-23 22:43:22,682 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-23 22:43:22,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-23 22:43:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-23 22:43:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-23 22:43:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2023-08-23 22:43:22,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2023-08-23 22:43:22,690 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 136 transitions. [2023-08-23 22:43:22,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 136 transitions. [2023-08-23 22:43:22,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:22,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 136 transitions. [2023-08-23 22:43:22,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 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) [2023-08-23 22:43:22,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-08-23 22:43:22,698 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-08-23 22:43:22,699 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 23 flow. Second operand 2 states and 136 transitions. [2023-08-23 22:43:22,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-23 22:43:22,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:22,701 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-23 22:43:22,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, 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=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-23 22:43:22,704 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-08-23 22:43:22,704 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-23 22:43:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 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) [2023-08-23 22:43:22,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:22,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 22:43:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:43:22,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:43:22,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash -689861676, now seen corresponding path program 1 times [2023-08-23 22:43:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175565151] [2023-08-23 22:43:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:22,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:43:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:22,745 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:43:22,745 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:43:22,746 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:43:22,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:43:22,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-23 22:43:22,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:43:22,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:43:22,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:43:22,748 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:43:22,750 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:43:22,750 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:43:22,766 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:22,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 135 transitions, 282 flow [2023-08-23 22:43:22,786 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-08-23 22:43:22,786 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:43:22,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-08-23 22:43:22,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 135 transitions, 282 flow [2023-08-23 22:43:22,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 135 transitions, 282 flow [2023-08-23 22:43:22,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:22,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 135 transitions, 282 flow [2023-08-23 22:43:22,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 135 transitions, 282 flow [2023-08-23 22:43:22,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 135 transitions, 282 flow [2023-08-23 22:43:22,803 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-08-23 22:43:22,803 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:43:22,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-08-23 22:43:22,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 8480 [2023-08-23 22:43:24,854 INFO L134 LiptonReduction]: Checked pairs total: 31412 [2023-08-23 22:43:24,854 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-23 22:43:24,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:24,856 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;@e34ca73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:24,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-23 22:43:24,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:24,860 INFO L124 PetriNetUnfolderBase]: 3/43 cut-off events. [2023-08-23 22:43:24,860 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:43:24,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:24,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:24,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:43:24,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1052601328, now seen corresponding path program 1 times [2023-08-23 22:43:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:24,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247407476] [2023-08-23 22:43:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247407476] [2023-08-23 22:43:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247407476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:25,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:25,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471997820] [2023-08-23 22:43:25,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:25,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 241 [2023-08-23 22:43:25,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:25,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:25,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 241 [2023-08-23 22:43:25,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:25,310 INFO L124 PetriNetUnfolderBase]: 915/1641 cut-off events. [2023-08-23 22:43:25,311 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-23 22:43:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3276 conditions, 1641 events. 915/1641 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10200 event pairs, 253 based on Foata normal form. 12/1413 useless extension candidates. Maximal degree in co-relation 2360. Up to 497 conditions per place. [2023-08-23 22:43:25,320 INFO L140 encePairwiseOnDemand]: 225/241 looper letters, 85 selfloop transitions, 10 changer transitions 0/102 dead transitions. [2023-08-23 22:43:25,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 102 transitions, 416 flow [2023-08-23 22:43:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2023-08-23 22:43:25,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893499308437068 [2023-08-23 22:43:25,326 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2023-08-23 22:43:25,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2023-08-23 22:43:25,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:25,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2023-08-23 22:43:25,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 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) [2023-08-23 22:43:25,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 241.0) internal successors, (1687), 7 states have internal predecessors, (1687), 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) [2023-08-23 22:43:25,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 241.0) internal successors, (1687), 7 states have internal predecessors, (1687), 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) [2023-08-23 22:43:25,333 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 136 flow. Second operand 6 states and 563 transitions. [2023-08-23 22:43:25,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 102 transitions, 416 flow [2023-08-23 22:43:25,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 102 transitions, 414 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:25,336 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 190 flow [2023-08-23 22:43:25,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-23 22:43:25,336 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2023-08-23 22:43:25,337 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 190 flow [2023-08-23 22:43:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:25,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:25,337 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 22:43:25,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:43:25,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:43:25,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash 896775523, now seen corresponding path program 1 times [2023-08-23 22:43:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:25,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262706547] [2023-08-23 22:43:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:25,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:25,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:43:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:25,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:43:25,359 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-23 22:43:25,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-23 22:43:25,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:43:25,360 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:43:25,360 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:43:25,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:43:25,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:25,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 399 flow [2023-08-23 22:43:25,400 INFO L124 PetriNetUnfolderBase]: 19/223 cut-off events. [2023-08-23 22:43:25,400 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:43:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 223 events. 19/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 789 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-23 22:43:25,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 399 flow [2023-08-23 22:43:25,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 189 transitions, 399 flow [2023-08-23 22:43:25,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:25,403 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 189 transitions, 399 flow [2023-08-23 22:43:25,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 189 transitions, 399 flow [2023-08-23 22:43:25,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 399 flow [2023-08-23 22:43:25,421 INFO L124 PetriNetUnfolderBase]: 19/223 cut-off events. [2023-08-23 22:43:25,421 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:43:25,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 223 events. 19/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 789 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-23 22:43:25,429 INFO L119 LiptonReduction]: Number of co-enabled transitions 21306 [2023-08-23 22:43:28,239 INFO L134 LiptonReduction]: Checked pairs total: 84912 [2023-08-23 22:43:28,240 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-23 22:43:28,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:28,242 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;@e34ca73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:28,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-23 22:43:28,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:28,244 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-08-23 22:43:28,245 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-23 22:43:28,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:28,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:28,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-23 22:43:28,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1197668612, now seen corresponding path program 1 times [2023-08-23 22:43:28,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:28,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782495850] [2023-08-23 22:43:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:28,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782495850] [2023-08-23 22:43:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782495850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:28,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:43:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451255599] [2023-08-23 22:43:28,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:43:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:43:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:43:28,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 339 [2023-08-23 22:43:28,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-23 22:43:28,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:28,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 339 [2023-08-23 22:43:28,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:30,842 INFO L124 PetriNetUnfolderBase]: 30296/42823 cut-off events. [2023-08-23 22:43:30,843 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2023-08-23 22:43:30,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86056 conditions, 42823 events. 30296/42823 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 1997. Compared 293213 event pairs, 13482 based on Foata normal form. 0/34841 useless extension candidates. Maximal degree in co-relation 14157. Up to 39627 conditions per place. [2023-08-23 22:43:31,058 INFO L140 encePairwiseOnDemand]: 323/339 looper letters, 91 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-08-23 22:43:31,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 431 flow [2023-08-23 22:43:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:43:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:43:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-23 22:43:31,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415929203539823 [2023-08-23 22:43:31,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-23 22:43:31,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-23 22:43:31,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:31,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-23 22:43:31,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2023-08-23 22:43:31,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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) [2023-08-23 22:43:31,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 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) [2023-08-23 22:43:31,063 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 203 flow. Second operand 3 states and 423 transitions. [2023-08-23 22:43:31,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 431 flow [2023-08-23 22:43:31,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 104 transitions, 423 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:31,074 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 211 flow [2023-08-23 22:43:31,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-08-23 22:43:31,075 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2023-08-23 22:43:31,075 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 211 flow [2023-08-23 22:43:31,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-23 22:43:31,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:31,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:43:31,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-23 22:43:31,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 172841002, now seen corresponding path program 1 times [2023-08-23 22:43:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:31,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684720463] [2023-08-23 22:43:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:31,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:31,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684720463] [2023-08-23 22:43:31,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684720463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:31,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568650826] [2023-08-23 22:43:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:31,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 339 [2023-08-23 22:43:31,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2023-08-23 22:43:31,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:31,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 339 [2023-08-23 22:43:31,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:34,330 INFO L124 PetriNetUnfolderBase]: 40997/58515 cut-off events. [2023-08-23 22:43:34,331 INFO L125 PetriNetUnfolderBase]: For 5522/5522 co-relation queries the response was YES. [2023-08-23 22:43:34,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122686 conditions, 58515 events. 40997/58515 cut-off events. For 5522/5522 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 431678 event pairs, 13203 based on Foata normal form. 310/51612 useless extension candidates. Maximal degree in co-relation 89481. Up to 25259 conditions per place. [2023-08-23 22:43:34,604 INFO L140 encePairwiseOnDemand]: 328/339 looper letters, 198 selfloop transitions, 14 changer transitions 0/221 dead transitions. [2023-08-23 22:43:34,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 221 transitions, 973 flow [2023-08-23 22:43:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 827 transitions. [2023-08-23 22:43:34,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40658800393313665 [2023-08-23 22:43:34,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 827 transitions. [2023-08-23 22:43:34,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 827 transitions. [2023-08-23 22:43:34,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:34,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 827 transitions. [2023-08-23 22:43:34,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.83333333333334) internal successors, (827), 6 states have internal predecessors, (827), 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) [2023-08-23 22:43:34,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 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) [2023-08-23 22:43:34,611 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 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) [2023-08-23 22:43:34,611 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 211 flow. Second operand 6 states and 827 transitions. [2023-08-23 22:43:34,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 221 transitions, 973 flow [2023-08-23 22:43:34,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 221 transitions, 967 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:43:34,617 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 296 flow [2023-08-23 22:43:34,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2023-08-23 22:43:34,620 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2023-08-23 22:43:34,621 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 296 flow [2023-08-23 22:43:34,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2023-08-23 22:43:34,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:34,621 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:43:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:43:34,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-23 22:43:34,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:34,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1731754208, now seen corresponding path program 1 times [2023-08-23 22:43:34,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:34,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859259861] [2023-08-23 22:43:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:34,632 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:43:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:34,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:43:34,650 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:43:34,650 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-23 22:43:34,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-23 22:43:34,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-23 22:43:34,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-23 22:43:34,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-23 22:43:34,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-23 22:43:34,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-23 22:43:34,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-23 22:43:34,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-23 22:43:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:43:34,653 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 22:43:34,653 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:43:34,653 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:43:34,690 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:34,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 243 transitions, 518 flow [2023-08-23 22:43:34,843 INFO L124 PetriNetUnfolderBase]: 25/289 cut-off events. [2023-08-23 22:43:34,843 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:43:34,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 289 events. 25/289 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1114 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-08-23 22:43:34,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 243 transitions, 518 flow [2023-08-23 22:43:34,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 243 transitions, 518 flow [2023-08-23 22:43:34,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:34,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 243 transitions, 518 flow [2023-08-23 22:43:34,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 243 transitions, 518 flow [2023-08-23 22:43:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 243 transitions, 518 flow [2023-08-23 22:43:34,875 INFO L124 PetriNetUnfolderBase]: 25/289 cut-off events. [2023-08-23 22:43:34,875 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:43:34,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 289 events. 25/289 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1114 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-08-23 22:43:34,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 39856 [2023-08-23 22:43:38,387 INFO L134 LiptonReduction]: Checked pairs total: 161119 [2023-08-23 22:43:38,387 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-23 22:43:38,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:38,389 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;@e34ca73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:38,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-23 22:43:38,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:38,391 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-08-23 22:43:38,391 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-23 22:43:38,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:38,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:38,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-08-23 22:43:38,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash 523117123, now seen corresponding path program 1 times [2023-08-23 22:43:38,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:38,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525055425] [2023-08-23 22:43:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:38,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:38,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525055425] [2023-08-23 22:43:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525055425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:38,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:38,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077278581] [2023-08-23 22:43:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:38,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:38,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 432 [2023-08-23 22:43:38,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-08-23 22:43:38,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:38,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 432 [2023-08-23 22:43:38,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand