./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer --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 ce492abcc29ddbc9795671b095b6bfaf5bfc547b ...................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-28 03:04:10,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:04:10,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:04:10,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:04:10,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:04:10,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:04:10,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:04:10,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:04:10,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:04:10,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:04:10,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:04:10,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:04:10,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:04:10,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:04:10,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:04:10,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:04:10,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:04:10,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:04:10,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:04:10,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:04:10,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:04:10,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:04:10,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:04:10,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:04:10,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:04:10,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:04:10,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:04:10,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:04:10,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:04:10,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:04:10,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:04:10,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:04:10,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:04:10,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:04:10,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:04:10,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:04:10,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:04:10,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:04:10,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:04:10,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:04:10,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:04:10,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 03:04:10,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:04:10,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:04:10,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:04:10,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:04:10,862 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:04:10,862 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:04:10,862 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:04:10,862 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:04:10,863 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:04:10,863 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:04:10,864 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:04:10,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:04:10,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:04:10,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:04:10,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:04:10,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:04:10,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:04:10,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:04:10,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:04:10,867 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:04:10,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:04:10,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:04:10,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:04:10,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:04:10,868 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:04:10,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:04:10,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:04:10,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:04:10,870 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:04:10,872 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:04:10,873 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:/tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce492abcc29ddbc9795671b095b6bfaf5bfc547b [2020-11-28 03:04:11,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:04:11,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:04:11,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:04:11,286 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:04:11,287 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:04:11,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2020-11-28 03:04:11,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/data/dec24189f/2338bc354ba447068a64a010681d347a/FLAG01ea4ab8f [2020-11-28 03:04:11,948 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:04:11,949 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2020-11-28 03:04:11,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/data/dec24189f/2338bc354ba447068a64a010681d347a/FLAG01ea4ab8f [2020-11-28 03:04:12,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/data/dec24189f/2338bc354ba447068a64a010681d347a [2020-11-28 03:04:12,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:04:12,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:04:12,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:12,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:04:12,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:04:12,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260326b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12, skipping insertion in model container [2020-11-28 03:04:12,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:04:12,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:04:12,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:12,562 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:04:12,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:12,594 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:04:12,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12 WrapperNode [2020-11-28 03:04:12,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:12,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:04:12,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:04:12,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:04:12,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:04:12,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:04:12,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:04:12,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:04:12,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:04:12,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:04:12,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:04:12,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:04:12,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:04:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-11-28 03:04:12,755 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-11-28 03:04:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-11-28 03:04:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-11-28 03:04:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:04:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:04:13,126 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:04:13,127 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:04:13,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:13 BoogieIcfgContainer [2020-11-28 03:04:13,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:04:13,146 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:04:13,146 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:04:13,150 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:04:13,151 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:04:13,152 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:04:12" (1/3) ... [2020-11-28 03:04:13,153 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@21f49e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:04:13, skipping insertion in model container [2020-11-28 03:04:13,154 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:04:13,154 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (2/3) ... [2020-11-28 03:04:13,154 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@21f49e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:04:13, skipping insertion in model container [2020-11-28 03:04:13,155 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:04:13,155 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:13" (3/3) ... [2020-11-28 03:04:13,156 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2020-11-28 03:04:13,246 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:04:13,246 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:04:13,247 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:04:13,247 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:04:13,247 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:04:13,247 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:04:13,248 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:04:13,248 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:04:13,264 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-11-28 03:04:13,294 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-11-28 03:04:13,294 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:04:13,294 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:04:13,303 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:04:13,304 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,304 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:04:13,304 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-11-28 03:04:13,308 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-11-28 03:04:13,308 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:04:13,308 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:04:13,309 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:04:13,309 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,318 INFO L794 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3#L26true assume !!(main_~x~0 <= 2147483646); 6#L27true call main_#t~ret6 := rec2(main_~x~0);< 5#rec2ENTRYtrue [2020-11-28 03:04:13,319 INFO L796 eck$LassoCheckResult]: Loop: 5#rec2ENTRYtrue ~j := #in~j; 22#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(1 + ~j);< 7#rec1ENTRYtrue ~i := #in~i; 12#L12true assume ~i <= 0;#res := 0; 8#rec1FINALtrue assume true; 15#rec1EXITtrue >#38#return; 24#L20-1true call #t~ret4 := rec2(#t~ret3);< 5#rec2ENTRYtrue [2020-11-28 03:04:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 1 times [2020-11-28 03:04:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226626310] [2020-11-28 03:04:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:13,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:13,442 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:13,468 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:04:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -959692825, now seen corresponding path program 1 times [2020-11-28 03:04:13,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428174001] [2020-11-28 03:04:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:04:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428174001] [2020-11-28 03:04:13,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:13,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:04:13,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608461824] [2020-11-28 03:04:13,634 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:04:13,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:13,663 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-11-28 03:04:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:13,830 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2020-11-28 03:04:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:04:13,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 35 transitions. [2020-11-28 03:04:13,838 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-11-28 03:04:13,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2020-11-28 03:04:13,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-28 03:04:13,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-28 03:04:13,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2020-11-28 03:04:13,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:04:13,849 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-11-28 03:04:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2020-11-28 03:04:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 03:04:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:04:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-11-28 03:04:13,885 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-11-28 03:04:13,885 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-11-28 03:04:13,885 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:04:13,885 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2020-11-28 03:04:13,887 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-11-28 03:04:13,887 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:04:13,887 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:04:13,889 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:04:13,889 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,889 INFO L794 eck$LassoCheckResult]: Stem: 80#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 65#L26 assume !!(main_~x~0 <= 2147483646); 66#L27 call main_#t~ret6 := rec2(main_~x~0);< 67#rec2ENTRY [2020-11-28 03:04:13,890 INFO L796 eck$LassoCheckResult]: Loop: 67#rec2ENTRY ~j := #in~j; 69#L18 assume !(~j <= 0); 74#L20 call #t~ret3 := rec1(1 + ~j);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume !(~i <= 0); 71#L14 call #t~ret0 := rec1(~i - 2);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#32#return; 72#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#34#return; 73#L14-2 call #t~ret2 := rec1(#t~ret1);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#36#return; 78#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 79#rec1FINAL assume true; 81#rec1EXIT >#38#return; 68#L20-1 call #t~ret4 := rec2(#t~ret3);< 67#rec2ENTRY [2020-11-28 03:04:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 2 times [2020-11-28 03:04:13,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781331504] [2020-11-28 03:04:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:13,898 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:13,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:13,916 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:04:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1440672699, now seen corresponding path program 1 times [2020-11-28 03:04:13,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128463555] [2020-11-28 03:04:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:13,942 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:13,982 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:13,991 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:04:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1765119907, now seen corresponding path program 1 times [2020-11-28 03:04:13,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941372831] [2020-11-28 03:04:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:14,015 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:14,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:14,040 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:04:14,466 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-11-28 03:04:14,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:04:14 BoogieIcfgContainer [2020-11-28 03:04:14,758 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:04:14,758 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:04:14,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:04:14,759 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:04:14,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:13" (3/4) ... [2020-11-28 03:04:14,772 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-28 03:04:14,837 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_71224f70-c0a9-44f2-85ed-f6c72cd8d642/bin/uautomizer/witness.graphml [2020-11-28 03:04:14,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:04:14,847 INFO L168 Benchmark]: Toolchain (without parser) took 2543.90 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.3 MB in the beginning and 45.1 MB in the end (delta: 8.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:14,848 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 90.2 MB. Free memory was 70.0 MB in the beginning and 69.9 MB in the end (delta: 42.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:14,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.71 ms. Allocated memory is still 90.2 MB. Free memory was 53.1 MB in the beginning and 67.3 MB in the end (delta: -14.2 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:14,850 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.04 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 66.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:14,851 INFO L168 Benchmark]: Boogie Preprocessor took 20.84 ms. Allocated memory is still 90.2 MB. Free memory was 66.0 MB in the beginning and 65.1 MB in the end (delta: 884.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:14,852 INFO L168 Benchmark]: RCFGBuilder took 488.95 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 55.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:14,856 INFO L168 Benchmark]: BuchiAutomizer took 1611.90 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 55.4 MB in the beginning and 47.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:14,857 INFO L168 Benchmark]: Witness Printer took 86.74 ms. Allocated memory is still 109.1 MB. Free memory was 47.0 MB in the beginning and 45.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:14,860 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 90.2 MB. Free memory was 70.0 MB in the beginning and 69.9 MB in the end (delta: 42.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.71 ms. Allocated memory is still 90.2 MB. Free memory was 53.1 MB in the beginning and 67.3 MB in the end (delta: -14.2 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.04 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 66.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.84 ms. Allocated memory is still 90.2 MB. Free memory was 66.0 MB in the beginning and 65.1 MB in the end (delta: 884.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 488.95 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 55.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 1611.90 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 55.4 MB in the beginning and 47.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. * Witness Printer took 86.74 ms. Allocated memory is still 109.1 MB. Free memory was 47.0 MB in the beginning and 45.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 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 5 locations. The remainder module has 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.4s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 1.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 17 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 53 SDs, 0 SdLazy, 31 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s 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: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7a93e7ed=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5e8b67b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@430d2d03=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@740c0d5e=0, j=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 17]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) [L27] CALL rec2(x) Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...