./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.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/Ackermann01-1.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 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:58:35,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:58:35,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:58:35,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:58:35,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:58:35,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:58:35,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:58:35,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:58:35,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:58:35,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:58:35,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:58:35,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:58:35,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:58:35,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:58:35,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:58:35,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:58:35,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:58:35,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:58:35,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:58:35,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:58:35,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:58:35,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:58:35,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:58:35,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:58:35,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:58:35,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:58:35,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:58:35,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:58:35,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:58:35,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:58:35,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:58:35,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:58:35,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:58:35,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:58:35,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:58:35,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:58:35,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:58:35,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:58:35,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:58:35,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:58:35,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:58:35,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-15 16:58:35,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:58:35,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:58:35,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:58:35,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:58:35,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:58:35,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:58:35,280 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:58:35,280 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-15 16:58:35,281 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-15 16:58:35,281 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-15 16:58:35,281 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-15 16:58:35,282 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-15 16:58:35,282 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-15 16:58:35,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:58:35,283 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:58:35,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:58:35,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:58:35,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-15 16:58:35,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-15 16:58:35,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-15 16:58:35,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 16:58:35,284 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-15 16:58:35,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:58:35,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-15 16:58:35,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:58:35,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:58:35,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:58:35,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 16:58:35,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:58:35,286 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-15 16:58:35,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2021-12-15 16:58:35,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:58:35,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:58:35,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:58:35,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:58:35,509 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:58:35,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-15 16:58:35,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e036d6421/3f0b4ac770ae4095954675aff3bd3d31/FLAG7819a3657 [2021-12-15 16:58:35,881 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:58:35,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-15 16:58:35,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e036d6421/3f0b4ac770ae4095954675aff3bd3d31/FLAG7819a3657 [2021-12-15 16:58:36,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e036d6421/3f0b4ac770ae4095954675aff3bd3d31 [2021-12-15 16:58:36,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:58:36,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:58:36,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:58:36,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:58:36,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:58:36,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a103dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36, skipping insertion in model container [2021-12-15 16:58:36,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:58:36,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:58:36,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2021-12-15 16:58:36,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:58:36,465 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 16:58:36,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2021-12-15 16:58:36,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:58:36,489 INFO L208 MainTranslator]: Completed translation [2021-12-15 16:58:36,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36 WrapperNode [2021-12-15 16:58:36,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:58:36,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 16:58:36,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 16:58:36,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 16:58:36,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,516 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-12-15 16:58:36,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 16:58:36,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 16:58:36,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 16:58:36,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 16:58:36,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 16:58:36,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 16:58:36,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 16:58:36,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 16:58:36,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (1/1) ... [2021-12-15 16:58:36,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-15 16:58:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 16:58:36,583 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 16:58:36,627 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 16:58:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 16:58:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 16:58:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 16:58:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-15 16:58:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-15 16:58:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 16:58:36,670 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 16:58:36,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 16:58:36,777 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 16:58:36,781 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 16:58:36,781 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 16:58:36,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:58:36 BoogieIcfgContainer [2021-12-15 16:58:36,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 16:58:36,784 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-15 16:58:36,784 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-15 16:58:36,801 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-15 16:58:36,802 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:36,802 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.12 04:58:36" (1/3) ... [2021-12-15 16:58:36,803 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@380c7466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 04:58:36, skipping insertion in model container [2021-12-15 16:58:36,803 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:36,803 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:58:36" (2/3) ... [2021-12-15 16:58:36,803 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@380c7466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.12 04:58:36, skipping insertion in model container [2021-12-15 16:58:36,804 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-15 16:58:36,804 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:58:36" (3/3) ... [2021-12-15 16:58:36,805 INFO L388 chiAutomizerObserver]: Analyzing ICFG Ackermann01-1.c [2021-12-15 16:58:36,865 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-15 16:58:36,866 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-15 16:58:36,866 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-15 16:58:36,866 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-15 16:58:36,866 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-15 16:58:36,866 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-15 16:58:36,866 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-15 16:58:36,866 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-15 16:58:36,878 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-15 16:58:36,900 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:36,901 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:36,901 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:36,908 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-12-15 16:58:36,908 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-15 16:58:36,908 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-15 16:58:36,909 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-15 16:58:36,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-15 16:58:36,913 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-15 16:58:36,914 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-15 16:58:36,914 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-12-15 16:58:36,914 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-15 16:58:36,919 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(16, 2);call #Ultimate.allocInit(12, 3); 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet7#1, main_#t~nondet8#1, main_#t~ret9#1, main_~m~0#1, main_~n~0#1, main_~result~0#1;main_~m~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1; 8#L29true assume !(main_~m~0#1 < 0 || main_~m~0#1 > 3);main_~n~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1; 9#L33true assume !(main_~n~0#1 < 0 || main_~n~0#1 > 23); 11#L36true call main_#t~ret9#1 := ackermann(main_~m~0#1, main_~n~0#1);< 6#ackermannENTRYtrue [2021-12-15 16:58:36,920 INFO L793 eck$LassoCheckResult]: Loop: 6#ackermannENTRYtrue ~m := #in~m;~n := #in~n; 14#L17true assume !(0 == ~m); 15#L20true assume 0 == ~n; 17#L21true call #t~ret4 := ackermann(~m - 1, 1);< 6#ackermannENTRYtrue [2021-12-15 16:58:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:58:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 28695872, now seen corresponding path program 1 times [2021-12-15 16:58:36,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 16:58:36,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936520518] [2021-12-15 16:58:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:58:36,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 16:58:36,976 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.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkFeasibilityAndComputeInterpolants(LassoCheck.java:924) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.checkStemFeasibility(LassoCheck.java:879) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.LassoCheck$LassoCheckResult.(LassoCheck.java:794) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 16:58:36,982 INFO L158 Benchmark]: Toolchain (without parser) took 661.46ms. Allocated memory is still 102.8MB. Free memory was 73.9MB in the beginning and 56.5MB in the end (delta: 17.3MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-12-15 16:58:36,983 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 60.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:58:36,984 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.39ms. Allocated memory is still 102.8MB. Free memory was 73.6MB in the beginning and 77.9MB in the end (delta: -4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 16:58:36,986 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.93ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 76.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 16:58:36,986 INFO L158 Benchmark]: Boogie Preprocessor took 25.02ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 75.5MB in the end (delta: 837.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:58:36,987 INFO L158 Benchmark]: RCFGBuilder took 240.42ms. Allocated memory is still 102.8MB. Free memory was 75.5MB in the beginning and 66.6MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 16:58:36,988 INFO L158 Benchmark]: BuchiAutomizer took 196.89ms. Allocated memory is still 102.8MB. Free memory was 66.3MB in the beginning and 56.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 16:58:36,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 60.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 169.39ms. Allocated memory is still 102.8MB. Free memory was 73.6MB in the beginning and 77.9MB in the end (delta: -4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.93ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 76.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.02ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 75.5MB in the end (delta: 837.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 240.42ms. Allocated memory is still 102.8MB. Free memory was 75.5MB in the beginning and 66.6MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 196.89ms. Allocated memory is still 102.8MB. Free memory was 66.3MB in the beginning and 56.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. 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 16:58:37,026 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