./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-numeric/twisted.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-numeric/twisted.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b68c797f7da07f29717590596e5fa31674f85e16d7b32a9335da92aff43a272 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:58:45,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:58:45,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:58:45,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:58:45,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:58:45,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:58:45,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:58:45,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:58:45,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:58:45,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:58:45,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:58:45,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:58:45,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:58:45,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:58:45,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:58:45,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:58:45,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:58:45,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:58:45,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:58:45,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:58:45,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:58:45,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:58:45,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:58:45,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:58:45,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:58:45,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:58:45,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:58:45,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:58:45,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:58:45,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:58:45,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:58:45,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:58:45,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:58:45,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:58:45,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:58:45,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:58:45,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:58:45,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:58:45,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:58:45,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:58:45,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:58:45,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-15 16:58:45,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:58:45,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:58:45,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:58:45,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:58:45,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:58:45,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:58:45,524 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:58:45,524 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-15 16:58:45,524 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-15 16:58:45,524 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-15 16:58:45,525 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-15 16:58:45,525 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-15 16:58:45,525 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-15 16:58:45,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:58:45,526 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:58:45,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:58:45,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:58:45,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-15 16:58:45,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-15 16:58:45,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-15 16:58:45,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 16:58:45,527 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-15 16:58:45,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:58:45,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-15 16:58:45,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:58:45,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:58:45,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:58:45,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 16:58:45,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:58:45,529 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-15 16:58:45,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b68c797f7da07f29717590596e5fa31674f85e16d7b32a9335da92aff43a272 [2021-12-15 16:58:45,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:58:45,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:58:45,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:58:45,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:58:45,759 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:58:45,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/twisted.c [2021-12-15 16:58:45,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6f54f39/922f20ed51fb43358007d4cebf37d599/FLAG8ac36d31a [2021-12-15 16:58:46,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:58:46,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/twisted.c [2021-12-15 16:58:46,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6f54f39/922f20ed51fb43358007d4cebf37d599/FLAG8ac36d31a [2021-12-15 16:58:46,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6f54f39/922f20ed51fb43358007d4cebf37d599 [2021-12-15 16:58:46,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:58:46,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:58:46,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:58:46,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:58:46,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:58:46,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ce5cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46, skipping insertion in model container [2021-12-15 16:58:46,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:58:46,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:58:46,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:58:46,797 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 16:58:46,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:58:46,824 INFO L208 MainTranslator]: Completed translation [2021-12-15 16:58:46,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46 WrapperNode [2021-12-15 16:58:46,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:58:46,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 16:58:46,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 16:58:46,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 16:58:46,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,855 INFO L137 Inliner]: procedures = 5, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2021-12-15 16:58:46,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 16:58:46,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 16:58:46,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 16:58:46,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 16:58:46,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 16:58:46,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 16:58:46,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 16:58:46,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 16:58:46,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (1/1) ... [2021-12-15 16:58:46,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-15 16:58:46,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 16:58:46,917 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) [2021-12-15 16:58:46,941 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 [2021-12-15 16:58:46,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 16:58:46,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 16:58:46,998 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 16:58:46,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 16:58:47,064 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 16:58:47,069 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 16:58:47,069 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 16:58:47,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:58:47 BoogieIcfgContainer [2021-12-15 16:58:47,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 16:58:47,072 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-15 16:58:47,072 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-15 16:58:47,074 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-15 16:58:47,075 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:47,075 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.12 04:58:46" (1/3) ... [2021-12-15 16:58:47,076 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a56a4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 04:58:47, skipping insertion in model container [2021-12-15 16:58:47,076 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:47,076 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:46" (2/3) ... [2021-12-15 16:58:47,076 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a56a4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 04:58:47, skipping insertion in model container [2021-12-15 16:58:47,076 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:47,077 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:58:47" (3/3) ... [2021-12-15 16:58:47,077 INFO L388 chiAutomizerObserver]: Analyzing ICFG twisted.c [2021-12-15 16:58:47,113 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-15 16:58:47,113 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-15 16:58:47,113 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-15 16:58:47,114 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-15 16:58:47,114 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-15 16:58:47,114 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-15 16:58:47,114 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-15 16:58:47,114 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-15 16:58:47,125 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-12-15 16:58:47,139 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:47,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:47,140 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:47,144 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-15 16:58:47,145 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-15 16:58:47,145 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-15 16:58:47,145 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-12-15 16:58:47,147 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:47,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:47,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:47,147 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-15 16:58:47,147 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-15 16:58:47,152 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~nondet3#1, main_#t~ret4#1;assume { :begin_inline_f } true;f_#in~k#1, f_#in~l#1 := main_#t~nondet2#1, main_#t~nondet3#1;havoc f_#res#1;havoc f_#t~post0#1, f_#t~post1#1, f_~k#1, f_~l#1, f_~i~0#1, f_~j~0#1;f_~k#1 := f_#in~k#1;f_~l#1 := f_#in~l#1;f_~i~0#1 := 0;f_~j~0#1 := 0; 10#L18true [2021-12-15 16:58:47,153 INFO L793 eck$LassoCheckResult]: Loop: 10#L18true assume !true; 11#L13true goto; 3#L16true assume !!(f_~j~0#1 < f_~l#1);f_#t~post1#1 := f_~j~0#1;f_~j~0#1 := 1 + f_#t~post1#1;havoc f_#t~post1#1; 6#L15true assume !(0 != (if f_~i~0#1 < 0 && 0 != f_~i~0#1 % 2 then f_~i~0#1 % 2 - 2 else f_~i~0#1 % 2)); 10#L18true [2021-12-15 16:58:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-15 16:58:47,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:47,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613003992] [2021-12-15 16:58:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:47,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,233 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,251 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1481770, now seen corresponding path program 1 times [2021-12-15 16:58:47,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:47,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728829147] [2021-12-15 16:58:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:47,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:58:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:58:47,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 16:58:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728829147] [2021-12-15 16:58:47,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728829147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:58:47,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:58:47,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-15 16:58:47,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086656374] [2021-12-15 16:58:47,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:58:47,287 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 16:58:47,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 16:58:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 16:58:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 16:58:47,313 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 1 states have internal predecessors, (4), 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) [2021-12-15 16:58:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:58:47,318 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-12-15 16:58:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 16:58:47,327 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-12-15 16:58:47,328 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:47,330 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 8 states and 11 transitions. [2021-12-15 16:58:47,331 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-15 16:58:47,331 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-15 16:58:47,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2021-12-15 16:58:47,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 16:58:47,332 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-15 16:58:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2021-12-15 16:58:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-15 16:58:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-15 16:58:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-12-15 16:58:47,349 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-15 16:58:47,349 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-12-15 16:58:47,349 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-15 16:58:47,349 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-12-15 16:58:47,349 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:47,349 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:47,350 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:47,350 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-15 16:58:47,350 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-12-15 16:58:47,350 INFO L791 eck$LassoCheckResult]: Stem: 40#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 41#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~nondet3#1, main_#t~ret4#1;assume { :begin_inline_f } true;f_#in~k#1, f_#in~l#1 := main_#t~nondet2#1, main_#t~nondet3#1;havoc f_#res#1;havoc f_#t~post0#1, f_#t~post1#1, f_~k#1, f_~l#1, f_~i~0#1, f_~j~0#1;f_~k#1 := f_#in~k#1;f_~l#1 := f_#in~l#1;f_~i~0#1 := 0;f_~j~0#1 := 0; 39#L18 [2021-12-15 16:58:47,350 INFO L793 eck$LassoCheckResult]: Loop: 39#L18 goto; 34#L9 assume !(f_~i~0#1 < f_~k#1); 35#L13 goto; 37#L16 assume !!(f_~j~0#1 < f_~l#1);f_#t~post1#1 := f_~j~0#1;f_~j~0#1 := 1 + f_#t~post1#1;havoc f_#t~post1#1; 38#L15 assume !(0 != (if f_~i~0#1 < 0 && 0 != f_~i~0#1 % 2 then f_~i~0#1 % 2 - 2 else f_~i~0#1 % 2)); 39#L18 [2021-12-15 16:58:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-15 16:58:47,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040967092] [2021-12-15 16:58:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:47,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,357 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,361 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 34460407, now seen corresponding path program 1 times [2021-12-15 16:58:47,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119412751] [2021-12-15 16:58:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:47,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,375 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,384 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1805899893, now seen corresponding path program 1 times [2021-12-15 16:58:47,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:47,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099299533] [2021-12-15 16:58:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:47,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,402 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:47,418 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:47,483 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.getTrivialTransFormula(TransFormulaBuilder.java:285) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.synthesize(LassoCheck.java:548) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkLoopTermination(LassoCheck.java:944) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.(LassoCheck.java:855) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck.(LassoCheck.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoop.iterate(BuchiCegarLoop.java:457) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:397) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 16:58:47,498 INFO L158 Benchmark]: Toolchain (without parser) took 868.45ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 73.2MB in the beginning and 71.4MB in the end (delta: 1.9MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2021-12-15 16:58:47,499 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory is still 58.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:58:47,500 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.89ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 73.0MB in the beginning and 107.0MB in the end (delta: -34.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 16:58:47,500 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.58ms. Allocated memory is still 130.0MB. Free memory was 107.0MB in the beginning and 105.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:58:47,501 INFO L158 Benchmark]: Boogie Preprocessor took 24.78ms. Allocated memory is still 130.0MB. Free memory was 105.5MB in the beginning and 104.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 16:58:47,501 INFO L158 Benchmark]: RCFGBuilder took 188.51ms. Allocated memory is still 130.0MB. Free memory was 104.4MB in the beginning and 96.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 16:58:47,502 INFO L158 Benchmark]: BuchiAutomizer took 425.36ms. Allocated memory is still 130.0MB. Free memory was 96.0MB in the beginning and 71.4MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-12-15 16:58:47,504 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory is still 58.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.89ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 73.0MB in the beginning and 107.0MB in the end (delta: -34.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.58ms. Allocated memory is still 130.0MB. Free memory was 107.0MB in the beginning and 105.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.78ms. Allocated memory is still 130.0MB. Free memory was 105.5MB in the beginning and 104.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 188.51ms. Allocated memory is still 130.0MB. Free memory was 104.4MB in the beginning and 96.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 425.36ms. Allocated memory is still 130.0MB. Free memory was 96.0MB in the beginning and 71.4MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 16:58:47,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Termination*64bit*_Bitvector*.epf No suitable settings file found using Termination*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable