./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version ff03de63 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-crafted/RecursiveNonterminating-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 fc6cfc9bc139db752e72885619d5342f9725bf67cec8b7ca9da9022c75c17b44 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 21:55:27,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 21:55:27,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 21:55:27,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 21:55:27,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 21:55:27,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 21:55:27,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 21:55:27,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 21:55:27,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 21:55:27,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 21:55:27,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 21:55:27,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 21:55:27,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 21:55:27,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 21:55:27,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 21:55:27,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 21:55:27,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 21:55:27,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 21:55:27,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 21:55:27,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 21:55:27,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 21:55:27,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 21:55:27,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 21:55:27,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 21:55:27,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 21:55:27,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 21:55:27,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 21:55:27,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 21:55:27,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 21:55:27,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 21:55:27,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 21:55:27,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 21:55:27,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 21:55:27,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 21:55:27,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 21:55:27,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 21:55:27,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 21:55:27,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 21:55:27,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 21:55:27,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 21:55:27,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 21:55:27,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-21 21:55:27,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 21:55:27,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 21:55:27,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 21:55:27,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 21:55:27,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 21:55:27,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 21:55:27,491 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 21:55:27,491 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-21 21:55:27,491 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-21 21:55:27,491 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-21 21:55:27,491 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-21 21:55:27,492 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-21 21:55:27,492 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-21 21:55:27,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 21:55:27,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 21:55:27,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 21:55:27,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 21:55:27,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-21 21:55:27,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 21:55:27,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 21:55:27,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 21:55:27,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 21:55:27,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 21:55:27,494 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-21 21:55:27,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc6cfc9bc139db752e72885619d5342f9725bf67cec8b7ca9da9022c75c17b44 [2021-12-21 21:55:27,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 21:55:27,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 21:55:27,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 21:55:27,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 21:55:27,682 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 21:55:27,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2021-12-21 21:55:27,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91bdd4625/ebeac23bf95842a1b4291ba416792654/FLAGd0286f6cd [2021-12-21 21:55:28,049 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 21:55:28,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2021-12-21 21:55:28,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91bdd4625/ebeac23bf95842a1b4291ba416792654/FLAGd0286f6cd [2021-12-21 21:55:28,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91bdd4625/ebeac23bf95842a1b4291ba416792654 [2021-12-21 21:55:28,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 21:55:28,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 21:55:28,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 21:55:28,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 21:55:28,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 21:55:28,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c6fc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28, skipping insertion in model container [2021-12-21 21:55:28,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 21:55:28,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 21:55:28,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 21:55:28,639 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 21:55:28,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 21:55:28,656 INFO L208 MainTranslator]: Completed translation [2021-12-21 21:55:28,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28 WrapperNode [2021-12-21 21:55:28,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 21:55:28,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 21:55:28,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 21:55:28,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 21:55:28,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,677 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 10 [2021-12-21 21:55:28,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 21:55:28,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 21:55:28,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 21:55:28,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 21:55:28,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 21:55:28,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 21:55:28,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 21:55:28,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 21:55:28,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (1/1) ... [2021-12-21 21:55:28,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 21:55:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 21:55:28,727 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) [2021-12-21 21:55:28,744 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 [2021-12-21 21:55:28,769 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-12-21 21:55:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-12-21 21:55:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 21:55:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 21:55:28,802 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 21:55:28,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 21:55:28,873 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 21:55:28,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 21:55:28,879 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 21:55:28,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:28 BoogieIcfgContainer [2021-12-21 21:55:28,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 21:55:28,881 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-21 21:55:28,881 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-21 21:55:28,883 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-21 21:55:28,883 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:55:28,884 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.12 09:55:28" (1/3) ... [2021-12-21 21:55:28,885 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3bbe04ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 09:55:28, skipping insertion in model container [2021-12-21 21:55:28,885 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:55:28,885 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:28" (2/3) ... [2021-12-21 21:55:28,885 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3bbe04ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 09:55:28, skipping insertion in model container [2021-12-21 21:55:28,886 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 21:55:28,886 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:28" (3/3) ... [2021-12-21 21:55:28,887 INFO L388 chiAutomizerObserver]: Analyzing ICFG RecursiveNonterminating-1.c [2021-12-21 21:55:28,924 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-21 21:55:28,925 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-21 21:55:28,925 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-21 21:55:28,925 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-21 21:55:28,925 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-21 21:55:28,925 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-21 21:55:28,925 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-21 21:55:28,925 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-21 21:55:28,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 21:55:28,954 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-21 21:55:28,955 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:28,955 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:28,959 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-21 21:55:28,959 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:55:28,960 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-21 21:55:28,960 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 21:55:28,962 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-12-21 21:55:28,962 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 21:55:28,962 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 21:55:28,962 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-21 21:55:28,962 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-21 21:55:28,967 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~n~0#1;main_~n~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 10#L18true assume !!(main_~n~0#1 <= 2147483646); 13#L19true call rec(main_~n~0#1, 1 + main_~n~0#1);< 11#recENTRYtrue [2021-12-21 21:55:28,967 INFO L793 eck$LassoCheckResult]: Loop: 11#recENTRYtrue ~x := #in~x;~y := #in~y; 4#L11true assume ~x <= 23 && ~x >= -42; 6#L12true call rec(2 * ~y - 2, 1 + ~x);< 11#recENTRYtrue [2021-12-21 21:55:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1202731, now seen corresponding path program 1 times [2021-12-21 21:55:28,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:28,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399150857] [2021-12-21 21:55:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:28,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:29,041 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:29,058 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash 29906, now seen corresponding path program 1 times [2021-12-21 21:55:29,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:29,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167765396] [2021-12-21 21:55:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:29,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:29,076 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:29,091 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 21:55:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1470820968, now seen corresponding path program 1 times [2021-12-21 21:55:29,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 21:55:29,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780059537] [2021-12-21 21:55:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 21:55:29,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 21:55:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:29,107 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 21:55:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 21:55:29,118 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 21:55:29,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.12 09:55:29 BoogieIcfgContainer [2021-12-21 21:55:29,298 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-21 21:55:29,299 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 21:55:29,299 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 21:55:29,299 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 21:55:29,300 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:28" (3/4) ... [2021-12-21 21:55:29,301 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-21 21:55:29,320 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 21:55:29,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 21:55:29,321 INFO L158 Benchmark]: Toolchain (without parser) took 820.48ms. Allocated memory is still 113.2MB. Free memory was 84.9MB in the beginning and 58.1MB in the end (delta: 26.8MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-12-21 21:55:29,322 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory was 44.0MB in the beginning and 43.9MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:29,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.86ms. Allocated memory is still 113.2MB. Free memory was 84.6MB in the beginning and 92.0MB in the end (delta: -7.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 21:55:29,323 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.13ms. Allocated memory is still 113.2MB. Free memory was 92.0MB in the beginning and 90.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:29,323 INFO L158 Benchmark]: Boogie Preprocessor took 10.29ms. Allocated memory is still 113.2MB. Free memory was 90.4MB in the beginning and 89.6MB in the end (delta: 817.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:29,323 INFO L158 Benchmark]: RCFGBuilder took 190.54ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 81.5MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 21:55:29,324 INFO L158 Benchmark]: BuchiAutomizer took 417.74ms. Allocated memory is still 113.2MB. Free memory was 81.2MB in the beginning and 59.8MB in the end (delta: 21.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-21 21:55:29,324 INFO L158 Benchmark]: Witness Printer took 21.29ms. Allocated memory is still 113.2MB. Free memory was 59.8MB in the beginning and 58.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 21:55:29,326 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 86.0MB. Free memory was 44.0MB in the beginning and 43.9MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.86ms. Allocated memory is still 113.2MB. Free memory was 84.6MB in the beginning and 92.0MB in the end (delta: -7.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.13ms. Allocated memory is still 113.2MB. Free memory was 92.0MB in the beginning and 90.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 10.29ms. Allocated memory is still 113.2MB. Free memory was 90.4MB in the beginning and 89.6MB in the end (delta: 817.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 190.54ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 81.5MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 417.74ms. Allocated memory is still 113.2MB. Free memory was 81.2MB in the beginning and 59.8MB in the end (delta: 21.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 21.29ms. Allocated memory is still 113.2MB. Free memory was 59.8MB in the beginning and 58.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.3s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 10]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {NULL=0, x=0, y=0, \old(x)=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@56e895b6=0, n=0, \old(y)=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L17] int n = __VERIFIER_nondet_int(); [L18] COND FALSE !(!(n<=2147483646)) [L19] CALL rec(n, n + 1) Loop: [L11] COND TRUE x <= 23 && x >= -42 [L12] CALL rec(2*y-2, x + 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-12-21 21:55:29,352 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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)