./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/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 0.1.24-6b5699a [2019-11-25 08:57:19,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:57:19,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:57:19,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:57:19,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:57:19,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:57:19,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:57:19,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:57:19,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:57:19,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:57:19,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:57:19,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:57:19,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:57:19,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:57:19,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:57:19,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:57:19,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:57:19,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:57:19,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:57:19,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:57:19,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:57:19,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:57:19,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:57:19,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:57:19,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:57:19,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:57:19,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:57:19,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:57:19,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:57:19,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:57:19,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:57:19,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:57:19,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:57:19,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:57:19,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:57:19,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:57:19,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:57:19,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:57:19,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:57:19,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:57:19,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:57:19,276 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-25 08:57:19,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:57:19,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:57:19,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:57:19,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:57:19,296 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:57:19,296 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:57:19,296 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:57:19,296 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:57:19,296 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:57:19,297 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:57:19,297 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:57:19,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:57:19,297 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:57:19,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:57:19,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:57:19,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:57:19,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:57:19,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:57:19,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:57:19,298 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:57:19,299 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:57:19,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:57:19,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:57:19,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:57:19,302 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:57:19,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:57:19,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:57:19,302 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:57:19,304 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:57:19,304 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_593d7867-cc3d-4779-a49f-1d0eef8f05f9/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 [2019-11-25 08:57:19,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:57:19,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:57:19,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:57:19,497 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:57:19,497 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:57:19,498 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2019-11-25 08:57:19,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/data/757842d2b/b02980a55f214efdbd31ffa752f932e9/FLAG10fb84fd8 [2019-11-25 08:57:19,957 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:57:19,957 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2019-11-25 08:57:19,963 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/data/757842d2b/b02980a55f214efdbd31ffa752f932e9/FLAG10fb84fd8 [2019-11-25 08:57:20,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/data/757842d2b/b02980a55f214efdbd31ffa752f932e9 [2019-11-25 08:57:20,361 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:57:20,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:57:20,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:20,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:57:20,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:57:20,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fba7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20, skipping insertion in model container [2019-11-25 08:57:20,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:57:20,392 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:57:20,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:20,584 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:57:20,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:20,674 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:57:20,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20 WrapperNode [2019-11-25 08:57:20,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:20,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:57:20,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:57:20,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:57:20,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:57:20,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:57:20,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:57:20,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:57:20,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... [2019-11-25 08:57:20,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:57:20,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:57:20,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:57:20,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:57:20,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/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 [2019-11-25 08:57:20,770 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-25 08:57:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-25 08:57:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-25 08:57:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-25 08:57:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:57:20,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:57:20,991 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:57:20,991 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:57:20,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:20 BoogieIcfgContainer [2019-11-25 08:57:20,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:57:20,993 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:57:20,993 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:57:20,997 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:57:20,998 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:57:20,998 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:57:20" (1/3) ... [2019-11-25 08:57:20,999 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3d641c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:57:20, skipping insertion in model container [2019-11-25 08:57:20,999 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:57:21,000 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:20" (2/3) ... [2019-11-25 08:57:21,000 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3d641c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:57:21, skipping insertion in model container [2019-11-25 08:57:21,000 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:57:21,000 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:20" (3/3) ... [2019-11-25 08:57:21,002 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2019-11-25 08:57:21,049 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:57:21,049 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:57:21,050 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:57:21,050 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:57:21,050 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:57:21,050 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:57:21,050 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:57:21,050 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:57:21,065 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2019-11-25 08:57:21,092 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:57:21,092 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:57:21,092 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:57:21,099 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:57:21,100 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:21,100 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:57:21,100 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2019-11-25 08:57:21,108 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:57:21,109 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:57:21,109 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:57:21,109 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:57:21,109 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:21,118 INFO L794 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3#L26true assume !!(main_~x~0 <= 2147483646); 6#L27true call main_#t~ret6 := rec2(main_~x~0);< 5#rec2ENTRYtrue [2019-11-25 08:57:21,119 INFO L796 eck$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 [2019-11-25 08:57:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 1 times [2019-11-25 08:57:21,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:21,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107854217] [2019-11-25 08:57:21,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,212 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:57:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:21,213 INFO L82 PathProgramCache]: Analyzing trace with hash -959692825, now seen corresponding path program 1 times [2019-11-25 08:57:21,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:21,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461904400] [2019-11-25 08:57:21,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:21,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461904400] [2019-11-25 08:57:21,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:21,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:57:21,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672468215] [2019-11-25 08:57:21,310 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:57:21,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:21,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:57:21,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:57:21,323 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-11-25 08:57:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:21,432 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2019-11-25 08:57:21,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:57:21,433 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 35 transitions. [2019-11-25 08:57:21,436 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:57:21,442 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2019-11-25 08:57:21,443 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-11-25 08:57:21,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-25 08:57:21,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2019-11-25 08:57:21,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:57:21,446 INFO L688 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2019-11-25 08:57:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2019-11-25 08:57:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-25 08:57:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:57:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2019-11-25 08:57:21,474 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2019-11-25 08:57:21,474 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2019-11-25 08:57:21,474 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:57:21,474 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2019-11-25 08:57:21,475 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:57:21,476 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:57:21,476 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:57:21,477 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-25 08:57:21,477 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:21,477 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 [2019-11-25 08:57:21,478 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~ret1;havoc #t~ret2;havoc #t~ret0; 79#rec1FINAL assume true; 81#rec1EXIT >#38#return; 68#L20-1 call #t~ret4 := rec2(#t~ret3);< 67#rec2ENTRY [2019-11-25 08:57:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 2 times [2019-11-25 08:57:21,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:21,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426100660] [2019-11-25 08:57:21,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,485 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:57:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1440672699, now seen corresponding path program 1 times [2019-11-25 08:57:21,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:21,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584688157] [2019-11-25 08:57:21,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,535 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:57:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:21,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1765119907, now seen corresponding path program 1 times [2019-11-25 08:57:21,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:21,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559371703] [2019-11-25 08:57:21,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,595 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:57:22,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:57:22 BoogieIcfgContainer [2019-11-25 08:57:22,094 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:57:22,094 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:57:22,094 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:57:22,095 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:57:22,095 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:20" (3/4) ... [2019-11-25 08:57:22,102 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-25 08:57:22,167 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_593d7867-cc3d-4779-a49f-1d0eef8f05f9/bin/uautomizer/witness.graphml [2019-11-25 08:57:22,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:57:22,174 INFO L168 Benchmark]: Toolchain (without parser) took 1810.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -132.3 MB). Peak memory consumption was 60.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:22,174 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. [2019-11-25 08:57:22,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -238.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:22,176 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.34 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. [2019-11-25 08:57:22,180 INFO L168 Benchmark]: Boogie Preprocessor took 12.64 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. [2019-11-25 08:57:22,183 INFO L168 Benchmark]: RCFGBuilder took 273.15 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: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:22,183 INFO L168 Benchmark]: BuchiAutomizer took 1100.60 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: 81.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:22,186 INFO L168 Benchmark]: Witness Printer took 77.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:22,188 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 313.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -238.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.34 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 12.64 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 273.15 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: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1100.60 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: 81.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 11.5 GB. * Witness Printer took 77.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. 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 1.0s 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@3c514a73=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@79126c3c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5c2cb5bb=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@35437bca=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...