./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/TwoFloatInterv.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 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/TwoFloatInterv.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 619980f24f1306727466f5c616de82a47a9f9fa9949a068930aef8a7aa603b17 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:22:27,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:22:27,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:22:28,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:22:28,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:22:28,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:22:28,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:22:28,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:22:28,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:22:28,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:22:28,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:22:28,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:22:28,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:22:28,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:22:28,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:22:28,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:22:28,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:22:28,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:22:28,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:22:28,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:22:28,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:22:28,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:22:28,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:22:28,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:22:28,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:22:28,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:22:28,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:22:28,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:22:28,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:22:28,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:22:28,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:22:28,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:22:28,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:22:28,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:22:28,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:22:28,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:22:28,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:22:28,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:22:28,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:22:28,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:22:28,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:22:28,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-16 09:22:28,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:22:28,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:22:28,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:22:28,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:22:28,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:22:28,072 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 09:22:28,072 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 09:22:28,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:22:28,073 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:22:28,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:22:28,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:22:28,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 09:22:28,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 09:22:28,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 09:22:28,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:22:28,074 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 09:22:28,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:22:28,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 09:22:28,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:22:28,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:22:28,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:22:28,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:22:28,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:22:28,075 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 09:22:28,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 619980f24f1306727466f5c616de82a47a9f9fa9949a068930aef8a7aa603b17 [2021-12-16 09:22:28,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:22:28,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:22:28,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:22:28,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:22:28,289 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:22:28,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/TwoFloatInterv.c [2021-12-16 09:22:28,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed5ffa0e/b14cc9b440bf41a59f086c98bb680f53/FLAGdf4c5a0fa [2021-12-16 09:22:28,702 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:22:28,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/TwoFloatInterv.c [2021-12-16 09:22:28,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed5ffa0e/b14cc9b440bf41a59f086c98bb680f53/FLAGdf4c5a0fa [2021-12-16 09:22:28,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed5ffa0e/b14cc9b440bf41a59f086c98bb680f53 [2021-12-16 09:22:28,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:22:28,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:22:28,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:22:28,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:22:28,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:22:28,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f462d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28, skipping insertion in model container [2021-12-16 09:22:28,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:22:28,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:22:28,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:22:28,865 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:22:28,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:22:28,896 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:22:28,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28 WrapperNode [2021-12-16 09:22:28,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:22:28,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:22:28,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:22:28,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:22:28,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,924 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 17 [2021-12-16 09:22:28,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:22:28,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:22:28,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:22:28,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:22:28,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:22:28,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:22:28,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:22:28,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:22:28,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (1/1) ... [2021-12-16 09:22:28,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:22:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:22:28,969 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) [2021-12-16 09:22:28,981 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 [2021-12-16 09:22:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:22:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:22:29,053 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:22:29,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:22:29,106 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:22:29,111 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:22:29,114 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 09:22:29,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:22:29 BoogieIcfgContainer [2021-12-16 09:22:29,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:22:29,117 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 09:22:29,117 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 09:22:29,119 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 09:22:29,120 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:22:29,120 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 09:22:28" (1/3) ... [2021-12-16 09:22:29,121 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4dc9bd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:22:29, skipping insertion in model container [2021-12-16 09:22:29,121 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:22:29,121 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:22:28" (2/3) ... [2021-12-16 09:22:29,122 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4dc9bd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:22:29, skipping insertion in model container [2021-12-16 09:22:29,122 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:22:29,122 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:22:29" (3/3) ... [2021-12-16 09:22:29,123 INFO L388 chiAutomizerObserver]: Analyzing ICFG TwoFloatInterv.c [2021-12-16 09:22:29,159 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 09:22:29,159 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 09:22:29,159 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 09:22:29,159 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 09:22:29,159 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 09:22:29,159 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 09:22:29,160 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 09:22:29,160 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 09:22:29,169 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) [2021-12-16 09:22:29,180 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:22:29,180 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:29,180 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:29,184 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-16 09:22:29,184 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 09:22:29,184 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 09:22:29,185 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) [2021-12-16 09:22:29,185 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:22:29,185 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:22:29,186 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:22:29,186 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-16 09:22:29,186 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 09:22:29,190 INFO L791 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1;havoc main_~i~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 4#L16-1true [2021-12-16 09:22:29,191 INFO L793 eck$LassoCheckResult]: Loop: 4#L16-1true assume !!(main_~i~0#1 > 0 && main_~i~0#1 < 50); 9#L10true assume !(main_~i~0#1 < 20); 6#L10-2true assume main_~i~0#1 > 10;main_~i~0#1 := 1 + main_~i~0#1; 7#L13-1true assume 30 <= main_~i~0#1 && main_~i~0#1 <= 40;main_~i~0#1 := main_~i~0#1 - 1; 4#L16-1true [2021-12-16 09:22:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-16 09:22:29,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:29,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397499183] [2021-12-16 09:22:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:29,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:29,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:29,260 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1267244, now seen corresponding path program 1 times [2021-12-16 09:22:29,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:29,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571378865] [2021-12-16 09:22:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:29,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:29,287 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:29,292 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:22:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash 889694446, now seen corresponding path program 1 times [2021-12-16 09:22:29,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:22:29,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57951621] [2021-12-16 09:22:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:22:29,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:22:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:29,315 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:22:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:22:29,329 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:22:29,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.12 09:22:29 BoogieIcfgContainer [2021-12-16 09:22:29,461 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-16 09:22:29,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 09:22:29,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 09:22:29,462 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 09:22:29,462 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:22:29" (3/4) ... [2021-12-16 09:22:29,465 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-16 09:22:29,512 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-16 09:22:29,513 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 09:22:29,514 INFO L158 Benchmark]: Toolchain (without parser) took 795.42ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 61.4MB in the beginning and 85.0MB in the end (delta: -23.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:29,514 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 92.3MB. Free memory is still 49.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:29,515 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.78ms. Allocated memory is still 92.3MB. Free memory was 61.2MB in the beginning and 69.9MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 09:22:29,515 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.80ms. Allocated memory is still 92.3MB. Free memory was 69.7MB in the beginning and 68.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:29,516 INFO L158 Benchmark]: Boogie Preprocessor took 13.31ms. Allocated memory is still 92.3MB. Free memory was 68.5MB in the beginning and 67.6MB in the end (delta: 966.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 09:22:29,516 INFO L158 Benchmark]: RCFGBuilder took 176.39ms. Allocated memory is still 92.3MB. Free memory was 67.6MB in the beginning and 59.5MB in the end (delta: 8.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-16 09:22:29,521 INFO L158 Benchmark]: BuchiAutomizer took 344.44ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 59.5MB in the beginning and 86.5MB in the end (delta: -26.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:29,522 INFO L158 Benchmark]: Witness Printer took 51.26ms. Allocated memory is still 111.1MB. Free memory was 86.5MB in the beginning and 85.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 09:22:29,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 92.3MB. Free memory is still 49.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.78ms. Allocated memory is still 92.3MB. Free memory was 61.2MB in the beginning and 69.9MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.80ms. Allocated memory is still 92.3MB. Free memory was 69.7MB in the beginning and 68.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.31ms. Allocated memory is still 92.3MB. Free memory was 68.5MB in the beginning and 67.6MB in the end (delta: 966.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 176.39ms. Allocated memory is still 92.3MB. Free memory was 67.6MB in the beginning and 59.5MB in the end (delta: 8.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 344.44ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 59.5MB in the beginning and 86.5MB in the end (delta: -26.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 51.26ms. Allocated memory is still 111.1MB. Free memory was 86.5MB in the beginning and 85.0MB in the end (delta: 1.5MB). 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 0.2s. 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: 9]: 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 {i=29, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1d6db244=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() Loop: [L9] COND TRUE i > 0 && i < 50 [L10] COND FALSE !(i < 20) [L13] COND TRUE i > 10 [L14] i = i+1 [L16] COND TRUE 30 <= i && i <= 40 [L17] i = i-1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-12-16 09:22:29,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)