./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/DivMinus2.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-restricted-15/DivMinus2.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 804e8d646f3136915195a4e5e9f5153cc3c1cd2abf96df3f09c683a14a27e4de --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:58:48,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:58:48,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:58:48,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:58:48,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:58:48,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:58:48,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:58:48,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:58:48,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:58:48,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:58:48,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:58:48,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:58:48,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:58:48,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:58:48,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:58:48,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:58:48,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:58:48,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:58:48,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:58:48,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:58:48,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:58:48,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:58:48,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:58:48,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:58:48,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:58:48,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:58:48,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:58:48,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:58:48,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:58:48,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:58:48,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:58:48,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:58:48,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:58:48,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:58:48,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:58:48,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:58:48,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:58:48,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:58:48,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:58:48,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:58:48,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:58:48,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-15 16:58:48,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:58:48,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:58:48,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:58:48,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:58:48,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:58:48,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:58:48,415 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:58:48,416 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-15 16:58:48,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-15 16:58:48,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-15 16:58:48,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:58:48,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 16:58:48,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:58:48,418 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-15 16:58:48,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 804e8d646f3136915195a4e5e9f5153cc3c1cd2abf96df3f09c683a14a27e4de [2021-12-15 16:58:48,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:58:48,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:58:48,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:58:48,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:58:48,628 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:58:48,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/DivMinus2.c [2021-12-15 16:58:48,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02bd32dca/bf2c6890ee524a03ae63029784530124/FLAGb6cc33901 [2021-12-15 16:58:49,084 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:58:49,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/DivMinus2.c [2021-12-15 16:58:49,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02bd32dca/bf2c6890ee524a03ae63029784530124/FLAGb6cc33901 [2021-12-15 16:58:49,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02bd32dca/bf2c6890ee524a03ae63029784530124 [2021-12-15 16:58:49,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:58:49,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:58:49,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:58:49,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:58:49,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:58:49,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e09c3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49, skipping insertion in model container [2021-12-15 16:58:49,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:58:49,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:58:49,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:58:49,298 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 16:58:49,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:58:49,324 INFO L208 MainTranslator]: Completed translation [2021-12-15 16:58:49,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49 WrapperNode [2021-12-15 16:58:49,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:58:49,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 16:58:49,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 16:58:49,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 16:58:49,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,348 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2021-12-15 16:58:49,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 16:58:49,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 16:58:49,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 16:58:49,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 16:58:49,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 16:58:49,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 16:58:49,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 16:58:49,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 16:58:49,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (1/1) ... [2021-12-15 16:58:49,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-15 16:58:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 16:58:49,386 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 16:58:49,404 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 16:58:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 16:58:49,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 16:58:49,453 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 16:58:49,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 16:58:49,530 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 16:58:49,535 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 16:58:49,536 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 16:58:49,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:58:49 BoogieIcfgContainer [2021-12-15 16:58:49,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 16:58:49,538 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-15 16:58:49,539 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-15 16:58:49,542 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-15 16:58:49,542 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:49,543 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.12 04:58:49" (1/3) ... [2021-12-15 16:58:49,544 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@112ddc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 04:58:49, skipping insertion in model container [2021-12-15 16:58:49,544 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:49,544 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:49" (2/3) ... [2021-12-15 16:58:49,544 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@112ddc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 04:58:49, skipping insertion in model container [2021-12-15 16:58:49,544 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:49,545 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:58:49" (3/3) ... [2021-12-15 16:58:49,546 INFO L388 chiAutomizerObserver]: Analyzing ICFG DivMinus2.c [2021-12-15 16:58:49,590 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-15 16:58:49,590 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-15 16:58:49,590 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-15 16:58:49,590 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-15 16:58:49,590 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-15 16:58:49,590 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-15 16:58:49,590 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-15 16:58:49,591 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-15 16:58:49,602 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 16:58:49,617 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-15 16:58:49,617 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:49,617 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:49,621 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-15 16:58:49,621 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-15 16:58:49,621 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-15 16:58:49,621 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 16:58:49,622 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-15 16:58:49,622 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:49,622 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:49,623 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-15 16:58:49,623 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-15 16:58:49,627 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~ytmp~0#1, main_~res~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~ytmp~0#1;havoc main_~res~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~res~0#1 := 0; 10#L14-2true [2021-12-15 16:58:49,628 INFO L793 eck$LassoCheckResult]: Loop: 10#L14-2true assume !!(main_~x~0#1 >= main_~y~0#1 && main_~y~0#1 > 0);main_~ytmp~0#1 := main_~y~0#1; 4#L17-2true assume !(0 != main_~ytmp~0#1); 8#L16-2true main_~res~0#1 := 1 + main_~res~0#1; 10#L14-2true [2021-12-15 16:58:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-15 16:58:49,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:49,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716842338] [2021-12-15 16:58:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:49,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,707 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,733 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash 40950, now seen corresponding path program 1 times [2021-12-15 16:58:49,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:49,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086049774] [2021-12-15 16:58:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:49,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:58:49,797 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 16:58:49,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 16:58:49,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086049774] [2021-12-15 16:58:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086049774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:58:49,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:58:49,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:58:49,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573427859] [2021-12-15 16:58:49,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:58:49,801 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-15 16:58:49,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 16:58:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:58:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:58:49,852 INFO L87 Difference]: Start difference. First operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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 16:58:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:58:49,882 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-12-15 16:58:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:58:49,887 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2021-12-15 16:58:49,888 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:49,890 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 8 states and 10 transitions. [2021-12-15 16:58:49,890 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-15 16:58:49,891 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-15 16:58:49,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 10 transitions. [2021-12-15 16:58:49,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-15 16:58:49,892 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-15 16:58:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 10 transitions. [2021-12-15 16:58:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-15 16:58:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 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 16:58:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-12-15 16:58:49,910 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-15 16:58:49,910 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-15 16:58:49,910 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-15 16:58:49,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2021-12-15 16:58:49,912 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:49,912 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:49,912 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:49,913 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-15 16:58:49,913 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-12-15 16:58:49,913 INFO L791 eck$LassoCheckResult]: Stem: 34#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 35#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~ytmp~0#1, main_~res~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~ytmp~0#1;havoc main_~res~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~res~0#1 := 0; 37#L14-2 [2021-12-15 16:58:49,914 INFO L793 eck$LassoCheckResult]: Loop: 37#L14-2 assume !!(main_~x~0#1 >= main_~y~0#1 && main_~y~0#1 > 0);main_~ytmp~0#1 := main_~y~0#1; 31#L17-2 assume !!(0 != main_~ytmp~0#1); 32#L17 assume main_~ytmp~0#1 > 0;main_~ytmp~0#1 := main_~ytmp~0#1 - 1;main_~x~0#1 := main_~x~0#1 - 1; 33#L17-2 assume !(0 != main_~ytmp~0#1); 36#L16-2 main_~res~0#1 := 1 + main_~res~0#1; 37#L14-2 [2021-12-15 16:58:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-15 16:58:49,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:49,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074971394] [2021-12-15 16:58:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:49,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,930 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,935 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash 39406393, now seen corresponding path program 1 times [2021-12-15 16:58:49,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:49,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152115453] [2021-12-15 16:58:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:49,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,948 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,959 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1810845879, now seen corresponding path program 1 times [2021-12-15 16:58:49,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:49,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193347982] [2021-12-15 16:58:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:49,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,971 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 16:58:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 16:58:49,984 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 16:58:50,075 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 16:58:50,080 INFO L158 Benchmark]: Toolchain (without parser) took 968.40ms. Allocated memory is still 121.6MB. Free memory was 90.8MB in the beginning and 62.8MB in the end (delta: 28.0MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2021-12-15 16:58:50,081 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 92.3MB. Free memory was 51.4MB in the beginning and 51.3MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:58:50,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.79ms. Allocated memory is still 121.6MB. Free memory was 90.5MB in the beginning and 99.7MB in the end (delta: -9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 16:58:50,081 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.74ms. Allocated memory is still 121.6MB. Free memory was 99.7MB in the beginning and 98.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:58:50,082 INFO L158 Benchmark]: Boogie Preprocessor took 12.23ms. Allocated memory is still 121.6MB. Free memory was 98.3MB in the beginning and 97.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 16:58:50,082 INFO L158 Benchmark]: RCFGBuilder took 174.77ms. Allocated memory is still 121.6MB. Free memory was 97.3MB in the beginning and 89.3MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 16:58:50,082 INFO L158 Benchmark]: BuchiAutomizer took 540.49ms. Allocated memory is still 121.6MB. Free memory was 89.3MB in the beginning and 62.8MB in the end (delta: 26.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-12-15 16:58:50,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 92.3MB. Free memory was 51.4MB in the beginning and 51.3MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.79ms. Allocated memory is still 121.6MB. Free memory was 90.5MB in the beginning and 99.7MB in the end (delta: -9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.74ms. Allocated memory is still 121.6MB. Free memory was 99.7MB in the beginning and 98.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.23ms. Allocated memory is still 121.6MB. Free memory was 98.3MB in the beginning and 97.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 174.77ms. Allocated memory is still 121.6MB. Free memory was 97.3MB in the beginning and 89.3MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 540.49ms. Allocated memory is still 121.6MB. Free memory was 89.3MB in the beginning and 62.8MB in the end (delta: 26.5MB). 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 16:58:50,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with 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