./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec 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-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.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 75dd2ce3f6219a56f38a72471186bda1e7610d5c ............................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 13:56:43,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 13:56:43,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 13:56:43,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 13:56:43,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 13:56:43,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 13:56:43,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 13:56:43,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 13:56:43,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 13:56:43,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 13:56:43,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 13:56:43,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 13:56:43,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 13:56:43,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 13:56:43,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 13:56:43,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 13:56:43,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 13:56:43,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 13:56:43,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 13:56:43,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 13:56:43,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 13:56:43,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 13:56:43,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 13:56:43,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 13:56:43,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 13:56:43,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 13:56:43,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 13:56:43,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 13:56:43,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 13:56:43,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 13:56:43,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 13:56:43,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 13:56:43,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 13:56:43,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 13:56:43,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 13:56:43,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 13:56:43,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 13:56:43,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 13:56:43,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 13:56:43,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 13:56:43,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 13:56:43,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 13:56:43,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 13:56:43,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 13:56:43,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 13:56:43,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 13:56:43,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 13:56:43,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 13:56:43,330 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 13:56:43,330 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 13:56:43,330 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 13:56:43,331 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 13:56:43,331 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 13:56:43,331 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 13:56:43,331 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 13:56:43,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 13:56:43,332 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 13:56:43,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 13:56:43,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 13:56:43,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 13:56:43,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 13:56:43,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 13:56:43,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 13:56:43,340 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 13:56:43,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 13:56:43,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 13:56:43,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 13:56:43,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 13:56:43,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 13:56:43,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 13:56:43,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 13:56:43,343 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 13:56:43,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75dd2ce3f6219a56f38a72471186bda1e7610d5c [2021-08-27 13:56:43,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 13:56:43,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 13:56:43,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 13:56:43,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 13:56:43,679 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 13:56:43,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2021-08-27 13:56:43,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/246e01c40/6c3a4e45aac8404aa3e5c6b730c8b15d/FLAGb9e949616 [2021-08-27 13:56:44,138 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 13:56:44,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2021-08-27 13:56:44,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/246e01c40/6c3a4e45aac8404aa3e5c6b730c8b15d/FLAGb9e949616 [2021-08-27 13:56:44,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/246e01c40/6c3a4e45aac8404aa3e5c6b730c8b15d [2021-08-27 13:56:44,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 13:56:44,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 13:56:44,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 13:56:44,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 13:56:44,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 13:56:44,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657153ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44, skipping insertion in model container [2021-08-27 13:56:44,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 13:56:44,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 13:56:44,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:56:44,702 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 13:56:44,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:56:44,722 INFO L208 MainTranslator]: Completed translation [2021-08-27 13:56:44,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44 WrapperNode [2021-08-27 13:56:44,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 13:56:44,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 13:56:44,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 13:56:44,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 13:56:44,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 13:56:44,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 13:56:44,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 13:56:44,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 13:56:44,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 13:56:44,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 13:56:44,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 13:56:44,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 13:56:44,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (1/1) ... [2021-08-27 13:56:44,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:44,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:44,782 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) [2021-08-27 13:56:44,821 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 [2021-08-27 13:56:44,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 13:56:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 13:56:44,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 13:56:44,970 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 13:56:44,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:44 BoogieIcfgContainer [2021-08-27 13:56:44,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 13:56:44,973 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 13:56:44,973 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 13:56:44,975 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 13:56:44,976 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:44,976 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 01:56:44" (1/3) ... [2021-08-27 13:56:44,978 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e6b1168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:56:44, skipping insertion in model container [2021-08-27 13:56:44,978 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:44,978 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:44" (2/3) ... [2021-08-27 13:56:44,978 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e6b1168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:56:44, skipping insertion in model container [2021-08-27 13:56:44,978 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:44,978 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:44" (3/3) ... [2021-08-27 13:56:44,980 INFO L389 chiAutomizerObserver]: Analyzing ICFG ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2021-08-27 13:56:45,032 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 13:56:45,032 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 13:56:45,032 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 13:56:45,032 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 13:56:45,032 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 13:56:45,032 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 13:56:45,033 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 13:56:45,033 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 13:56:45,045 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-08-27 13:56:45,059 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:45,059 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:45,059 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:45,064 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:56:45,064 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 13:56:45,064 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 13:56:45,064 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-08-27 13:56:45,065 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:45,065 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:45,065 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:45,066 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:56:45,066 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 13:56:45,071 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 4#L18true assume !(main_~k~0 >= 0);main_~i~0 := -1; 8#L23-1true [2021-08-27 13:56:45,072 INFO L793 eck$LassoCheckResult]: Loop: 8#L23-1true assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 8#L23-1true [2021-08-27 13:56:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:45,081 INFO L82 PathProgramCache]: Analyzing trace with hash 998, now seen corresponding path program 1 times [2021-08-27 13:56:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:45,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570362116] [2021-08-27 13:56:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:45,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,153 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,179 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 1 times [2021-08-27 13:56:45,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:45,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633042372] [2021-08-27 13:56:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:45,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,193 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,222 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash 30953, now seen corresponding path program 1 times [2021-08-27 13:56:45,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:45,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363145492] [2021-08-27 13:56:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:45,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:45,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:56:45,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363145492] [2021-08-27 13:56:45,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363145492] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:56:45,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:56:45,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 13:56:45,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423019120] [2021-08-27 13:56:45,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:56:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 13:56:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 13:56:45,407 INFO L87 Difference]: Start difference. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:56:45,449 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2021-08-27 13:56:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 13:56:45,451 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-08-27 13:56:45,453 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:45,456 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 3 states and 3 transitions. [2021-08-27 13:56:45,458 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2021-08-27 13:56:45,458 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2021-08-27 13:56:45,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3 transitions. [2021-08-27 13:56:45,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:56:45,459 INFO L681 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2021-08-27 13:56:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3 states and 3 transitions. [2021-08-27 13:56:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3 to 3. [2021-08-27 13:56:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3 transitions. [2021-08-27 13:56:45,480 INFO L704 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2021-08-27 13:56:45,480 INFO L587 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2021-08-27 13:56:45,480 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 13:56:45,481 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3 states and 3 transitions. [2021-08-27 13:56:45,481 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:45,481 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:45,481 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:45,482 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:56:45,482 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 13:56:45,483 INFO L791 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 26#L18 assume main_~k~0 >= 0; 27#L23-1 [2021-08-27 13:56:45,483 INFO L793 eck$LassoCheckResult]: Loop: 27#L23-1 assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 27#L23-1 [2021-08-27 13:56:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2021-08-27 13:56:45,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:45,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810729104] [2021-08-27 13:56:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:45,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,491 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,498 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 2 times [2021-08-27 13:56:45,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:45,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186249155] [2021-08-27 13:56:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:45,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,510 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,522 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash 30891, now seen corresponding path program 1 times [2021-08-27 13:56:45,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:45,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699040254] [2021-08-27 13:56:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:45,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,537 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:45,543 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:45,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 01:56:45 BoogieIcfgContainer [2021-08-27 13:56:45,639 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 13:56:45,640 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 13:56:45,640 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 13:56:45,640 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 13:56:45,640 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:44" (3/4) ... [2021-08-27 13:56:45,642 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 13:56:45,687 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 13:56:45,687 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 13:56:45,688 INFO L168 Benchmark]: Toolchain (without parser) took 1123.71 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 40.1 MB in the beginning and 55.2 MB in the end (delta: -15.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:45,689 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 42.9 MB in the beginning and 42.9 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:45,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.88 ms. Allocated memory is still 60.8 MB. Free memory was 39.8 MB in the beginning and 31.5 MB in the end (delta: 8.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:45,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.52 ms. Allocated memory is still 60.8 MB. Free memory was 31.3 MB in the beginning and 30.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:45,695 INFO L168 Benchmark]: Boogie Preprocessor took 12.79 ms. Allocated memory is still 60.8 MB. Free memory was 30.1 MB in the beginning and 29.3 MB in the end (delta: 785.3 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:45,696 INFO L168 Benchmark]: RCFGBuilder took 212.45 ms. Allocated memory is still 60.8 MB. Free memory was 29.1 MB in the beginning and 38.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:45,696 INFO L168 Benchmark]: BuchiAutomizer took 666.42 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.1 MB in the beginning and 36.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:45,697 INFO L168 Benchmark]: Witness Printer took 47.26 ms. Allocated memory is still 73.4 MB. Free memory was 36.2 MB in the beginning and 55.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:45,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 42.9 MB in the beginning and 42.9 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 156.88 ms. Allocated memory is still 60.8 MB. Free memory was 39.8 MB in the beginning and 31.5 MB in the end (delta: 8.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.52 ms. Allocated memory is still 60.8 MB. Free memory was 31.3 MB in the beginning and 30.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.79 ms. Allocated memory is still 60.8 MB. Free memory was 30.1 MB in the beginning and 29.3 MB in the end (delta: 785.3 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 212.45 ms. Allocated memory is still 60.8 MB. Free memory was 29.1 MB in the beginning and 38.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 666.42 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.1 MB in the beginning and 36.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Witness Printer took 47.26 ms. Allocated memory is still 73.4 MB. Free memory was 36.2 MB in the beginning and 55.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.6s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 8.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 3 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.3ms Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 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: 23]: 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 {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4af7e84c=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@65da710e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@37b5fa6d=0, i=0, k=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int k, i; [L16] k = __VERIFIER_nondet_int() [L17] i = __VERIFIER_nondet_int() [L18] COND TRUE k >= 0 Loop: [L23] COND TRUE i >= 0 [L24] i = __VERIFIER_nondet_int() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-08-27 13:56:45,728 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...