/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/BuchiAutomizerCInline.xml -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -i ../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-21b0908 [2022-07-22 11:41:16,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:41:16,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:41:16,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:41:16,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:41:16,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:41:16,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:41:16,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:41:16,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:41:16,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:41:16,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:41:16,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:41:16,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:41:16,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:41:16,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:41:16,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:41:16,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:41:16,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:41:16,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:41:16,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:41:16,827 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:41:16,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:41:16,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:41:16,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:41:16,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:41:16,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-07-22 11:41:16,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:41:16,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:41:16,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:41:16,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2022-07-22 11:41:16,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:41:16,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:41:16,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:41:16,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:41:16,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:41:16,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:41:16,884 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:41:16,884 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 11:41:16,884 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 11:41:16,885 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 11:41:16,885 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 11:41:16,885 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 11:41:16,885 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 11:41:16,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:41:16,886 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:41:16,886 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 11:41:16,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:41:16,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:41:16,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:41:16,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 11:41:16,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 11:41:16,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 11:41:16,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:41:16,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:41:16,888 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 11:41:16,888 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:41:16,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 11:41:16,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:41:16,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:41:16,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:41:16,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:41:16,890 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:41:16,891 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 11:41:16,892 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-07-22 11:41:17,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:41:17,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:41:17,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:41:17,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:41:17,337 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:41:17,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i [2022-07-22 11:41:17,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53a6830c/5b25f840a9204600aef5e0de54a730be/FLAG7c810ab20 [2022-07-22 11:41:18,350 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:41:18,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i [2022-07-22 11:41:18,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53a6830c/5b25f840a9204600aef5e0de54a730be/FLAG7c810ab20 [2022-07-22 11:41:18,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53a6830c/5b25f840a9204600aef5e0de54a730be [2022-07-22 11:41:18,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:41:18,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-07-22 11:41:18,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:41:18,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:41:18,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:41:18,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:41:18" (1/1) ... [2022-07-22 11:41:18,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aa82a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:18, skipping insertion in model container [2022-07-22 11:41:18,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:41:18" (1/1) ... [2022-07-22 11:41:18,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:41:18,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:41:19,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i[63494,63507] [2022-07-22 11:41:19,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:41:19,466 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:41:19,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i[63494,63507] [2022-07-22 11:41:19,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:41:19,753 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:41:19,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19 WrapperNode [2022-07-22 11:41:19,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:41:19,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:41:19,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:41:19,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:41:19,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:19,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:19,979 INFO L137 Inliner]: procedures = 397, calls = 214, calls flagged for inlining = 52, calls inlined = 211, statements flattened = 3600 [2022-07-22 11:41:19,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:41:19,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:41:19,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:41:19,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:41:19,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:19,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:41:20,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:41:20,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:41:20,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:41:20,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (1/1) ... [2022-07-22 11:41:20,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 11:41:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:41:20,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 11:41:20,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 11:41:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 11:41:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 11:41:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 11:41:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:41:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:41:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:41:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2022-07-22 11:41:20,353 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2022-07-22 11:41:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2022-07-22 11:41:20,354 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2022-07-22 11:41:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2022-07-22 11:41:20,354 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2022-07-22 11:41:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:41:20,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:41:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 11:41:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:41:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 11:41:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:41:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2022-07-22 11:41:20,356 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2022-07-22 11:41:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2022-07-22 11:41:20,356 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2022-07-22 11:41:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2022-07-22 11:41:20,356 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2022-07-22 11:41:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2022-07-22 11:41:20,357 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2022-07-22 11:41:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:41:20,361 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 11:41:20,822 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:41:20,824 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:41:24,682 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:41:28,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:41:28,100 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 11:41:28,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:41:28 BoogieIcfgContainer [2022-07-22 11:41:28,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:41:28,108 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 11:41:28,108 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 11:41:28,113 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 11:41:28,114 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 11:41:28,114 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 11:41:18" (1/3) ... [2022-07-22 11:41:28,115 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ad29e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 11:41:28, skipping insertion in model container [2022-07-22 11:41:28,115 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 11:41:28,116 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:19" (2/3) ... [2022-07-22 11:41:28,116 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ad29e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 11:41:28, skipping insertion in model container [2022-07-22 11:41:28,116 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 11:41:28,116 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:41:28" (3/3) ... [2022-07-22 11:41:28,118 INFO L322 chiAutomizerObserver]: Analyzing ICFG elimination_backoff_stack.i [2022-07-22 11:41:29,061 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 11:41:29,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 2365 places, 2497 transitions, 5029 flow [2022-07-22 11:41:33,821 INFO L129 PetriNetUnfolder]: 147/2483 cut-off events. [2022-07-22 11:41:33,821 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 11:41:34,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 2483 events. 147/2483 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 16736 event pairs, 0 based on Foata normal form. 0/2336 useless extension candidates. Maximal degree in co-relation 2428. Up to 6 conditions per place. [2022-07-22 11:41:34,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 2365 places, 2497 transitions, 5029 flow [2022-07-22 11:41:34,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2358 places, 2483 transitions, 4987 flow [2022-07-22 11:41:34,984 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 11:41:34,985 INFO L301 stractBuchiCegarLoop]: Hoare is false [2022-07-22 11:41:34,985 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 11:41:34,985 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 11:41:34,985 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 11:41:34,985 INFO L305 stractBuchiCegarLoop]: Difference is false [2022-07-22 11:41:34,986 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 11:41:34,986 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 11:41:34,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states