./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a_false-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a_false-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/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 0.1.23-635dfa2 [2018-12-02 20:21:17,499 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 20:21:17,500 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 20:21:17,506 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 20:21:17,506 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 20:21:17,507 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 20:21:17,508 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 20:21:17,509 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 20:21:17,510 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 20:21:17,511 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 20:21:17,511 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 20:21:17,511 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 20:21:17,512 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 20:21:17,513 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 20:21:17,513 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 20:21:17,513 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 20:21:17,514 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 20:21:17,515 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 20:21:17,515 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 20:21:17,516 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 20:21:17,517 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 20:21:17,517 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 20:21:17,519 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 20:21:17,519 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 20:21:17,519 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 20:21:17,520 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 20:21:17,520 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 20:21:17,521 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 20:21:17,521 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 20:21:17,521 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 20:21:17,521 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 20:21:17,522 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 20:21:17,522 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 20:21:17,522 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 20:21:17,522 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 20:21:17,523 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 20:21:17,523 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-12-02 20:21:17,530 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 20:21:17,530 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 20:21:17,531 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 20:21:17,531 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 20:21:17,531 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 20:21:17,531 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-02 20:21:17,531 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-02 20:21:17,532 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-02 20:21:17,532 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-02 20:21:17,532 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-02 20:21:17,532 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-02 20:21:17,532 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 20:21:17,532 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 20:21:17,533 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-02 20:21:17,534 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 20:21:17,534 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-02 20:21:17,534 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 20:21:17,534 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 20:21:17,534 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-02 20:21:17,534 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 20:21:17,534 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 20:21:17,535 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-02 20:21:17,535 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-02 20:21:17,535 INFO L133 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/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/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 [2018-12-02 20:21:17,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 20:21:17,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 20:21:17,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 20:21:17,571 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 20:21:17,571 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 20:21:17,571 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a_false-termination_true-valid-memsafety.c [2018-12-02 20:21:17,615 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/data/01b9d80a7/3da39a00cebb4cadbab7a381cde688fb/FLAG35db0dbb1 [2018-12-02 20:21:17,954 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 20:21:17,954 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/sv-benchmarks/c/termination-crafted/NestedRecursion_1a_false-termination_true-valid-memsafety.c [2018-12-02 20:21:17,958 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/data/01b9d80a7/3da39a00cebb4cadbab7a381cde688fb/FLAG35db0dbb1 [2018-12-02 20:21:18,350 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/data/01b9d80a7/3da39a00cebb4cadbab7a381cde688fb [2018-12-02 20:21:18,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 20:21:18,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 20:21:18,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 20:21:18,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 20:21:18,356 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 20:21:18,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92370fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18, skipping insertion in model container [2018-12-02 20:21:18,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 20:21:18,372 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 20:21:18,458 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 20:21:18,460 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 20:21:18,469 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 20:21:18,476 INFO L195 MainTranslator]: Completed translation [2018-12-02 20:21:18,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18 WrapperNode [2018-12-02 20:21:18,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 20:21:18,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 20:21:18,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 20:21:18,477 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 20:21:18,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 20:21:18,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 20:21:18,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 20:21:18,496 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 20:21:18,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... [2018-12-02 20:21:18,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 20:21:18,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 20:21:18,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 20:21:18,505 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 20:21:18,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/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 [2018-12-02 20:21:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-12-02 20:21:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-12-02 20:21:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-12-02 20:21:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-12-02 20:21:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 20:21:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 20:21:18,658 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 20:21:18,658 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-02 20:21:18,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:21:18 BoogieIcfgContainer [2018-12-02 20:21:18,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 20:21:18,659 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-02 20:21:18,659 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-02 20:21:18,661 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-02 20:21:18,662 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 20:21:18,662 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.12 08:21:18" (1/3) ... [2018-12-02 20:21:18,662 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@63c8561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 08:21:18, skipping insertion in model container [2018-12-02 20:21:18,663 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 20:21:18,663 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:21:18" (2/3) ... [2018-12-02 20:21:18,663 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@63c8561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 08:21:18, skipping insertion in model container [2018-12-02 20:21:18,663 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 20:21:18,663 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:21:18" (3/3) ... [2018-12-02 20:21:18,664 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a_false-termination_true-valid-memsafety.c [2018-12-02 20:21:18,698 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 20:21:18,698 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-02 20:21:18,698 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-02 20:21:18,698 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-02 20:21:18,698 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 20:21:18,698 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 20:21:18,699 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-02 20:21:18,699 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 20:21:18,699 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-02 20:21:18,708 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-12-02 20:21:18,723 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 20:21:18,723 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 20:21:18,723 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 20:21:18,728 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-12-02 20:21:18,729 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:21:18,729 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-02 20:21:18,729 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-12-02 20:21:18,730 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 20:21:18,730 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 20:21:18,730 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 20:21:18,731 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-12-02 20:21:18,731 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:21:18,736 INFO L794 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3#L26true assume !!(main_~x~0 <= 2147483646); 6#L27true call main_#t~ret6 := rec2(main_~x~0);< 5#rec2ENTRYtrue [2018-12-02 20:21:18,736 INFO L796 eck$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 [2018-12-02 20:21:18,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:21:18,740 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 1 times [2018-12-02 20:21:18,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 20:21:18,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 20:21:18,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:21:18,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:21:18,800 INFO L82 PathProgramCache]: Analyzing trace with hash -959692825, now seen corresponding path program 1 times [2018-12-02 20:21:18,800 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 20:21:18,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 20:21:18,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:21:18,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 20:21:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 20:21:18,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 20:21:18,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 20:21:18,849 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-02 20:21:18,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 20:21:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 20:21:18,859 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2018-12-02 20:21:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 20:21:18,906 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2018-12-02 20:21:18,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 20:21:18,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 35 transitions. [2018-12-02 20:21:18,910 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 20:21:18,915 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2018-12-02 20:21:18,915 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-12-02 20:21:18,916 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-12-02 20:21:18,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2018-12-02 20:21:18,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-02 20:21:18,917 INFO L705 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-12-02 20:21:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2018-12-02 20:21:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-02 20:21:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-02 20:21:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2018-12-02 20:21:18,935 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-12-02 20:21:18,935 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-12-02 20:21:18,935 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-02 20:21:18,936 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2018-12-02 20:21:18,936 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 20:21:18,936 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 20:21:18,936 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 20:21:18,937 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-12-02 20:21:18,937 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 20:21:18,937 INFO L794 eck$LassoCheckResult]: Stem: 76#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; 61#L26 assume !!(main_~x~0 <= 2147483646); 62#L27 call main_#t~ret6 := rec2(main_~x~0);< 63#rec2ENTRY [2018-12-02 20:21:18,937 INFO L796 eck$LassoCheckResult]: Loop: 63#rec2ENTRY ~j := #in~j; 65#L18 assume !(~j <= 0); 70#L20 call #t~ret3 := rec1(1 + ~j);< 66#rec1ENTRY ~i := #in~i; 71#L12 assume !(~i <= 0); 67#L14 call #t~ret0 := rec1(~i - 2);< 66#rec1ENTRY ~i := #in~i; 71#L12 assume ~i <= 0;#res := 0; 72#rec1FINAL assume true; 73#rec1EXIT >#32#return; 68#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 66#rec1ENTRY ~i := #in~i; 71#L12 assume ~i <= 0;#res := 0; 72#rec1FINAL assume true; 73#rec1EXIT >#34#return; 69#L14-2 call #t~ret2 := rec1(#t~ret1);< 66#rec1ENTRY ~i := #in~i; 71#L12 assume ~i <= 0;#res := 0; 72#rec1FINAL assume true; 73#rec1EXIT >#36#return; 74#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret2;havoc #t~ret1; 75#rec1FINAL assume true; 77#rec1EXIT >#38#return; 64#L20-1 call #t~ret4 := rec2(#t~ret3);< 63#rec2ENTRY [2018-12-02 20:21:18,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:21:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 2 times [2018-12-02 20:21:18,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 20:21:18,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 20:21:18,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:21:18,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:21:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1440672699, now seen corresponding path program 1 times [2018-12-02 20:21:18,941 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 20:21:18,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 20:21:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 20:21:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 20:21:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1765119907, now seen corresponding path program 1 times [2018-12-02 20:21:18,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 20:21:18,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 20:21:18,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 20:21:18,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 20:21:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 20:21:19,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.12 08:21:19 BoogieIcfgContainer [2018-12-02 20:21:19,204 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-02 20:21:19,205 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 20:21:19,205 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 20:21:19,205 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 20:21:19,205 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:21:18" (3/4) ... [2018-12-02 20:21:19,207 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-12-02 20:21:19,233 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_84987b33-7acb-4871-b6fb-5a6e0e88d68f/bin-2019/uautomizer/witness.graphml [2018-12-02 20:21:19,233 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 20:21:19,234 INFO L168 Benchmark]: Toolchain (without parser) took 881.01 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 953.3 MB in the beginning and 992.3 MB in the end (delta: -39.0 MB). Peak memory consumption was 61.1 MB. Max. memory is 11.5 GB. [2018-12-02 20:21:19,235 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 20:21:19,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.26 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 20:21:19,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.18 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 20:21:19,235 INFO L168 Benchmark]: Boogie Preprocessor took 9.33 ms. Allocated memory is still 1.0 GB. Free memory was 942.6 MB in the beginning and 939.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 20:21:19,236 INFO L168 Benchmark]: RCFGBuilder took 153.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-02 20:21:19,236 INFO L168 Benchmark]: BuchiAutomizer took 546.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 995.0 MB in the end (delta: 88.7 MB). Peak memory consumption was 88.7 MB. Max. memory is 11.5 GB. [2018-12-02 20:21:19,237 INFO L168 Benchmark]: Witness Printer took 28.31 ms. Allocated memory is still 1.1 GB. Free memory was 995.0 MB in the beginning and 992.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 20:21:19,239 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 123.26 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.18 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.33 ms. Allocated memory is still 1.0 GB. Free memory was 942.6 MB in the beginning and 939.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 153.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 546.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 995.0 MB in the end (delta: 88.7 MB). Peak memory consumption was 88.7 MB. Max. memory is 11.5 GB. * Witness Printer took 28.31 ms. Allocated memory is still 1.1 GB. Free memory was 995.0 MB in the beginning and 992.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 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 0.5s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 0.3s. 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@318f727d=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@77a58c6b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@37a97c9d=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7af15bbf=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...