./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/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 0.1.24-678e011 [2019-11-20 07:24:09,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:24:09,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:24:09,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:24:09,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:24:09,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:24:09,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:24:09,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:24:09,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:24:09,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:24:09,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:24:09,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:24:09,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:24:09,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:24:09,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:24:09,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:24:09,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:24:09,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:24:09,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:24:09,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:24:09,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:24:09,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:24:09,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:24:09,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:24:09,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:24:09,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:24:09,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:24:09,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:24:09,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:24:09,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:24:09,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:24:09,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:24:09,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:24:09,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:24:09,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:24:09,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:24:09,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:24:09,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:24:09,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:24:09,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:24:09,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:24:09,782 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 07:24:09,807 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:24:09,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:24:09,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:24:09,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:24:09,808 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:24:09,809 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 07:24:09,809 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 07:24:09,809 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 07:24:09,809 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 07:24:09,809 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 07:24:09,809 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 07:24:09,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:24:09,810 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 07:24:09,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 07:24:09,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:24:09,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 07:24:09,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 07:24:09,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 07:24:09,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 07:24:09,811 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 07:24:09,811 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:24:09,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 07:24:09,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:24:09,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:24:09,812 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 07:24:09,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:24:09,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 07:24:09,812 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 07:24:09,813 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 07:24:09,813 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_e3104b05-16a9-461f-a8d2-8a35cb487f1a/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 [2019-11-20 07:24:09,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:24:10,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:24:10,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:24:10,006 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:24:10,007 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:24:10,007 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2019-11-20 07:24:10,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/data/5e3948709/6f8eac6843004c9fac03a73c445ed203/FLAGb41457ba0 [2019-11-20 07:24:10,463 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:24:10,463 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2019-11-20 07:24:10,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/data/5e3948709/6f8eac6843004c9fac03a73c445ed203/FLAGb41457ba0 [2019-11-20 07:24:10,483 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/data/5e3948709/6f8eac6843004c9fac03a73c445ed203 [2019-11-20 07:24:10,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:24:10,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 07:24:10,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:24:10,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:24:10,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:24:10,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df61e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10, skipping insertion in model container [2019-11-20 07:24:10,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,504 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:24:10,519 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:24:10,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:24:10,662 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:24:10,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:24:10,755 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:24:10,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10 WrapperNode [2019-11-20 07:24:10,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:24:10,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 07:24:10,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 07:24:10,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 07:24:10,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 07:24:10,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:24:10,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:24:10,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:24:10,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... [2019-11-20 07:24:10,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:24:10,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:24:10,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:24:10,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:24:10,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/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 [2019-11-20 07:24:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-20 07:24:10,861 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-20 07:24:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-20 07:24:10,862 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-20 07:24:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:24:10,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:24:11,122 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:24:11,122 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 07:24:11,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:24:11 BoogieIcfgContainer [2019-11-20 07:24:11,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:24:11,124 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 07:24:11,124 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 07:24:11,127 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 07:24:11,128 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 07:24:11,128 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 07:24:10" (1/3) ... [2019-11-20 07:24:11,129 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@54ce40f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 07:24:11, skipping insertion in model container [2019-11-20 07:24:11,129 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 07:24:11,129 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:10" (2/3) ... [2019-11-20 07:24:11,130 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@54ce40f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 07:24:11, skipping insertion in model container [2019-11-20 07:24:11,130 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 07:24:11,130 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:24:11" (3/3) ... [2019-11-20 07:24:11,131 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2019-11-20 07:24:11,200 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 07:24:11,200 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 07:24:11,200 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 07:24:11,200 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:24:11,200 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:24:11,201 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 07:24:11,201 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:24:11,201 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 07:24:11,216 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2019-11-20 07:24:11,245 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 07:24:11,245 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:24:11,245 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:24:11,251 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 07:24:11,251 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:24:11,252 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 07:24:11,252 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2019-11-20 07:24:11,254 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 07:24:11,254 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:24:11,255 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:24:11,255 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 07:24:11,255 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:24:11,262 INFO L794 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3#L26true assume !!(main_~x~0 <= 2147483646); 6#L27true call main_#t~ret6 := rec2(main_~x~0);< 5#rec2ENTRYtrue [2019-11-20 07:24:11,263 INFO L796 eck$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 [2019-11-20 07:24:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:24:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 1 times [2019-11-20 07:24:11,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:24:11,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191563930] [2019-11-20 07:24:11,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:24:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,359 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:24:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:24:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -959692825, now seen corresponding path program 1 times [2019-11-20 07:24:11,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:24:11,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896304527] [2019-11-20 07:24:11,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:24:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:24:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:24:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:24:11,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896304527] [2019-11-20 07:24:11,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:24:11,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 07:24:11,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822347551] [2019-11-20 07:24:11,465 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 07:24:11,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:24:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 07:24:11,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 07:24:11,478 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-11-20 07:24:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:24:11,592 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2019-11-20 07:24:11,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 07:24:11,595 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 35 transitions. [2019-11-20 07:24:11,598 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 07:24:11,604 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2019-11-20 07:24:11,606 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-11-20 07:24:11,606 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-20 07:24:11,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2019-11-20 07:24:11,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 07:24:11,608 INFO L688 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2019-11-20 07:24:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2019-11-20 07:24:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 07:24:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 07:24:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2019-11-20 07:24:11,635 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2019-11-20 07:24:11,636 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2019-11-20 07:24:11,636 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 07:24:11,636 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2019-11-20 07:24:11,637 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 07:24:11,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:24:11,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:24:11,639 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 07:24:11,639 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:24:11,639 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 [2019-11-20 07:24:11,639 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~ret0;havoc #t~ret1;havoc #t~ret2; 79#rec1FINAL assume true; 81#rec1EXIT >#38#return; 68#L20-1 call #t~ret4 := rec2(#t~ret3);< 67#rec2ENTRY [2019-11-20 07:24:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:24:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 2 times [2019-11-20 07:24:11,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:24:11,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612836489] [2019-11-20 07:24:11,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:24:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,647 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:24:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:24:11,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1440672699, now seen corresponding path program 1 times [2019-11-20 07:24:11,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:24:11,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844977666] [2019-11-20 07:24:11,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:24:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,681 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:24:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:24:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1765119907, now seen corresponding path program 1 times [2019-11-20 07:24:11,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:24:11,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165531664] [2019-11-20 07:24:11,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:24:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:24:11,715 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:24:12,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 07:24:12 BoogieIcfgContainer [2019-11-20 07:24:12,182 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 07:24:12,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 07:24:12,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 07:24:12,185 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 07:24:12,189 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:24:11" (3/4) ... [2019-11-20 07:24:12,192 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-20 07:24:12,230 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e3104b05-16a9-461f-a8d2-8a35cb487f1a/bin/uautomizer/witness.graphml [2019-11-20 07:24:12,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 07:24:12,232 INFO L168 Benchmark]: Toolchain (without parser) took 1743.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 61.0 MB. Max. memory is 11.5 GB. [2019-11-20 07:24:12,232 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:24:12,233 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -252.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 07:24:12,233 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:24:12,234 INFO L168 Benchmark]: Boogie Preprocessor took 17.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:24:12,234 INFO L168 Benchmark]: RCFGBuilder took 318.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-20 07:24:12,235 INFO L168 Benchmark]: BuchiAutomizer took 1057.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 80.6 MB). Peak memory consumption was 80.6 MB. Max. memory is 11.5 GB. [2019-11-20 07:24:12,235 INFO L168 Benchmark]: Witness Printer took 46.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:24:12,238 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 265.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -252.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 318.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1057.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 80.6 MB). Peak memory consumption was 80.6 MB. Max. memory is 11.5 GB. * Witness Printer took 46.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 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 0.9s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 0.7s. 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 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@7277ea11=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@24906a51=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2e76937b=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3fb2001=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...