./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 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-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 c81b642bdc34318660f50d5b284278ba8988a3d4 ....................................................................................................................................................................................................................................................................................................................................... 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 14:12:06,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:12:06,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:12:06,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:12:06,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:12:06,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:12:06,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:12:06,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:12:06,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:12:06,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:12:06,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:12:06,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:12:06,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:12:06,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:12:06,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:12:06,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:12:06,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:12:06,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:12:06,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:12:06,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:12:06,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:12:06,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:12:06,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:12:06,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:12:06,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:12:06,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:12:06,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:12:06,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:12:06,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:12:06,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:12:06,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:12:06,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:12:06,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:12:06,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:12:06,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:12:06,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:12:06,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:12:06,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:12:06,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:12:06,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:12:06,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:12:06,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 14:12:06,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:12:06,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:12:06,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:12:06,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:12:06,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:12:06,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:12:06,540 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:12:06,540 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:12:06,541 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:12:06,541 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:12:06,542 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:12:06,542 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:12:06,542 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:12:06,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:12:06,542 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:12:06,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:12:06,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:12:06,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:12:06,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:12:06,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:12:06,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:12:06,544 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:12:06,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:12:06,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:12:06,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:12:06,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:12:06,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:12:06,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:12:06,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:12:06,546 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:12:06,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c81b642bdc34318660f50d5b284278ba8988a3d4 [2021-08-27 14:12:06,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:12:06,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:12:06,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:12:06,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:12:06,870 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:12:06,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/TwoFloatInterv.c [2021-08-27 14:12:06,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b434ee8/c009de3b097943ea9928c2d768697967/FLAGab96ac7c9 [2021-08-27 14:12:07,342 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:12:07,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/TwoFloatInterv.c [2021-08-27 14:12:07,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b434ee8/c009de3b097943ea9928c2d768697967/FLAGab96ac7c9 [2021-08-27 14:12:07,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b434ee8/c009de3b097943ea9928c2d768697967 [2021-08-27 14:12:07,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:12:07,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:12:07,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:12:07,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:12:07,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:12:07,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30049e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07, skipping insertion in model container [2021-08-27 14:12:07,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:12:07,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:12:07,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:12:07,474 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:12:07,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:12:07,493 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:12:07,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07 WrapperNode [2021-08-27 14:12:07,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:12:07,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:12:07,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:12:07,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:12:07,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:12:07,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:12:07,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:12:07,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:12:07,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:12:07,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:12:07,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:12:07,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:12:07,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (1/1) ... [2021-08-27 14:12:07,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:12:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:12:07,551 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 14:12:07,578 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 14:12:07,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:12:07,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:12:07,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:12:07,737 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 14:12:07,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:12:07 BoogieIcfgContainer [2021-08-27 14:12:07,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:12:07,740 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:12:07,740 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:12:07,742 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:12:07,743 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:12:07,743 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:12:07" (1/3) ... [2021-08-27 14:12:07,744 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e1ee31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:12:07, skipping insertion in model container [2021-08-27 14:12:07,744 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:12:07,744 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:12:07" (2/3) ... [2021-08-27 14:12:07,745 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e1ee31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:12:07, skipping insertion in model container [2021-08-27 14:12:07,745 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:12:07,745 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:12:07" (3/3) ... [2021-08-27 14:12:07,747 INFO L389 chiAutomizerObserver]: Analyzing ICFG TwoFloatInterv.c [2021-08-27 14:12:07,793 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:12:07,793 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:12:07,793 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:12:07,793 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:12:07,794 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:12:07,794 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:12:07,794 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:12:07,794 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:12:07,807 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 14:12:07,820 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 14:12:07,820 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:07,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:07,824 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:12:07,825 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 14:12:07,825 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:12:07,825 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 14:12:07,826 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 14:12:07,826 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:07,826 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:07,827 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:12:07,827 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 14:12:07,832 INFO L791 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 4#L16-1true [2021-08-27 14:12:07,833 INFO L793 eck$LassoCheckResult]: Loop: 4#L16-1true assume !!(main_~i~0 > 0 && main_~i~0 < 50); 9#L10true assume main_~i~0 < 20;main_~i~0 := main_~i~0 - 1; 6#L10-2true assume main_~i~0 > 10;main_~i~0 := 1 + main_~i~0; 7#L13-1true assume 30 <= main_~i~0 && main_~i~0 <= 40;main_~i~0 := main_~i~0 - 1; 4#L16-1true [2021-08-27 14:12:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 14:12:07,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:07,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51218554] [2021-08-27 14:12:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:07,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:07,905 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:07,923 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1234538, now seen corresponding path program 1 times [2021-08-27 14:12:07,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:07,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743790652] [2021-08-27 14:12:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:07,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:12:08,063 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 14:12:08,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:12:08,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743790652] [2021-08-27 14:12:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743790652] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:12:08,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:12:08,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 14:12:08,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098835147] [2021-08-27 14:12:08,068 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 14:12:08,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:12:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 14:12:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 14:12:08,081 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 14:12:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:12:08,157 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-08-27 14:12:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 14:12:08,160 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 25 transitions. [2021-08-27 14:12:08,161 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2021-08-27 14:12:08,164 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 12 states and 16 transitions. [2021-08-27 14:12:08,164 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-08-27 14:12:08,165 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-08-27 14:12:08,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 16 transitions. [2021-08-27 14:12:08,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:12:08,165 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-08-27 14:12:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 16 transitions. [2021-08-27 14:12:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 9. [2021-08-27 14:12:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 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 14:12:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2021-08-27 14:12:08,190 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2021-08-27 14:12:08,190 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2021-08-27 14:12:08,190 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 14:12:08,191 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 13 transitions. [2021-08-27 14:12:08,192 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-08-27 14:12:08,192 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:12:08,193 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:12:08,193 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:12:08,193 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 14:12:08,194 INFO L791 eck$LassoCheckResult]: Stem: 43#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 44#L16-1 [2021-08-27 14:12:08,194 INFO L793 eck$LassoCheckResult]: Loop: 44#L16-1 assume !!(main_~i~0 > 0 && main_~i~0 < 50); 45#L10 assume !(main_~i~0 < 20); 46#L10-2 assume main_~i~0 > 10;main_~i~0 := 1 + main_~i~0; 47#L13-1 assume 30 <= main_~i~0 && main_~i~0 <= 40;main_~i~0 := main_~i~0 - 1; 44#L16-1 [2021-08-27 14:12:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-08-27 14:12:08,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:08,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716238022] [2021-08-27 14:12:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:08,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:08,205 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:08,209 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:08,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1236460, now seen corresponding path program 1 times [2021-08-27 14:12:08,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:08,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488838552] [2021-08-27 14:12:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:08,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:08,221 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:08,230 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:12:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 29865611, now seen corresponding path program 1 times [2021-08-27 14:12:08,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:12:08,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137654056] [2021-08-27 14:12:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:12:08,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:12:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:08,251 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:12:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:12:08,258 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:12:08,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:12:08 BoogieIcfgContainer [2021-08-27 14:12:08,387 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:12:08,388 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:12:08,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:12:08,389 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:12:08,389 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:12:07" (3/4) ... [2021-08-27 14:12:08,396 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 14:12:08,431 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 14:12:08,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:12:08,432 INFO L168 Benchmark]: Toolchain (without parser) took 1066.83 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 35.1 MB in the beginning and 47.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 875.3 kB. Max. memory is 16.1 GB. [2021-08-27 14:12:08,436 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.0 MB in the end (delta: 44.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:08,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.95 ms. Allocated memory is still 56.6 MB. Free memory was 35.0 MB in the beginning and 26.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:08,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.83 ms. Allocated memory is still 56.6 MB. Free memory was 26.4 MB in the beginning and 25.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:08,438 INFO L168 Benchmark]: Boogie Preprocessor took 12.25 ms. Allocated memory is still 56.6 MB. Free memory was 25.2 MB in the beginning and 24.2 MB in the end (delta: 958.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:08,439 INFO L168 Benchmark]: RCFGBuilder took 211.27 ms. Allocated memory is still 56.6 MB. Free memory was 24.2 MB in the beginning and 33.9 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:08,439 INFO L168 Benchmark]: BuchiAutomizer took 648.39 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.8 MB in the beginning and 48.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. [2021-08-27 14:12:08,439 INFO L168 Benchmark]: Witness Printer took 42.44 ms. Allocated memory is still 69.2 MB. Free memory was 48.6 MB in the beginning and 47.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:12:08,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.0 MB in the end (delta: 44.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 126.95 ms. Allocated memory is still 56.6 MB. Free memory was 35.0 MB in the beginning and 26.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 19.83 ms. Allocated memory is still 56.6 MB. Free memory was 26.4 MB in the beginning and 25.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.25 ms. Allocated memory is still 56.6 MB. Free memory was 25.2 MB in the beginning and 24.2 MB in the end (delta: 958.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 211.27 ms. Allocated memory is still 56.6 MB. Free memory was 24.2 MB in the beginning and 33.9 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 648.39 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.8 MB in the beginning and 48.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. * Witness Printer took 42.44 ms. Allocated memory is still 69.2 MB. Free memory was 48.6 MB in the beginning and 47.2 MB in the end (delta: 1.4 MB). There was no memory consumed. 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 4 locations. The remainder module has 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.5s 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 9.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 9 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 12 SDtfs, 8 SDslu, 6 SDs, 0 SdLazy, 25 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.7ms Time LassoAnalysisResults: nont1 unkn0 SFLI1 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 {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2cdc810=0, \result=0, i=29} - 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! [2021-08-27 14:12:08,480 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...