./Ultimate.py --spec ../../sv-benchmarks/c/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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/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_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/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 0.1.23-1dbac8b [2018-11-10 12:11:25,929 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:11:25,931 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:11:25,939 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:11:25,939 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:11:25,940 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:11:25,941 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:11:25,942 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:11:25,943 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:11:25,943 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:11:25,944 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:11:25,944 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:11:25,945 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:11:25,945 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:11:25,946 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:11:25,946 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:11:25,947 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:11:25,948 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:11:25,949 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:11:25,950 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:11:25,951 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:11:25,951 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:11:25,953 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:11:25,953 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:11:25,953 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:11:25,954 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:11:25,954 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:11:25,955 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:11:25,955 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:11:25,956 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:11:25,956 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:11:25,957 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:11:25,957 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:11:25,957 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:11:25,957 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:11:25,958 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:11:25,958 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-10 12:11:25,968 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:11:25,968 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:11:25,969 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:11:25,969 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:11:25,970 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:11:25,970 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-10 12:11:25,970 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-10 12:11:25,970 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-10 12:11:25,970 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-10 12:11:25,970 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-10 12:11:25,970 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-10 12:11:25,970 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-10 12:11:25,971 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:11:25,972 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-10 12:11:25,972 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-10 12:11:25,972 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:11:25,972 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:11:25,972 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-10 12:11:25,972 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:11:25,972 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:11:25,973 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-10 12:11:25,973 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-10 12:11:25,973 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_a78ae9a9-f135-4db4-afca-762c36d82bf8/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 [2018-11-10 12:11:25,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:11:26,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:11:26,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:11:26,005 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:11:26,005 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:11:26,006 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a_false-termination_true-valid-memsafety.c [2018-11-10 12:11:26,041 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/data/de17343db/84765f140a6b497db6f3c8e3b7fe46e7/FLAGc70a3a708 [2018-11-10 12:11:26,432 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:11:26,433 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/sv-benchmarks/c/termination-crafted/NestedRecursion_1a_false-termination_true-valid-memsafety.c [2018-11-10 12:11:26,436 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/data/de17343db/84765f140a6b497db6f3c8e3b7fe46e7/FLAGc70a3a708 [2018-11-10 12:11:26,444 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/data/de17343db/84765f140a6b497db6f3c8e3b7fe46e7 [2018-11-10 12:11:26,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:11:26,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 12:11:26,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:11:26,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:11:26,450 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:11:26,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783ef71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26, skipping insertion in model container [2018-11-10 12:11:26,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:11:26,467 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:11:26,556 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:11:26,558 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:11:26,567 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:11:26,575 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:11:26,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26 WrapperNode [2018-11-10 12:11:26,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:11:26,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 12:11:26,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 12:11:26,576 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 12:11:26,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 12:11:26,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:11:26,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:11:26,594 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:11:26,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... [2018-11-10 12:11:26,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:11:26,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:11:26,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:11:26,604 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:11:26,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/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 [2018-11-10 12:11:26,688 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-10 12:11:26,689 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-10 12:11:26,689 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-10 12:11:26,689 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-10 12:11:26,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:11:26,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:11:26,801 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:11:26,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:11:26 BoogieIcfgContainer [2018-11-10 12:11:26,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:11:26,802 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-10 12:11:26,802 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-10 12:11:26,805 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-10 12:11:26,806 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 12:11:26,806 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 10.11 12:11:26" (1/3) ... [2018-11-10 12:11:26,807 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@138a07c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 12:11:26, skipping insertion in model container [2018-11-10 12:11:26,807 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 12:11:26,807 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:11:26" (2/3) ... [2018-11-10 12:11:26,808 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@138a07c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 12:11:26, skipping insertion in model container [2018-11-10 12:11:26,808 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 12:11:26,808 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:11:26" (3/3) ... [2018-11-10 12:11:26,809 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a_false-termination_true-valid-memsafety.c [2018-11-10 12:11:26,856 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:11:26,857 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-10 12:11:26,857 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-10 12:11:26,857 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-10 12:11:26,857 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:11:26,857 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:11:26,857 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-10 12:11:26,857 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:11:26,857 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-10 12:11:26,869 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states. [2018-11-10 12:11:26,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:11:26,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:11:26,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:11:26,897 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-10 12:11:26,897 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:11:26,897 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-10 12:11:26,897 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states. [2018-11-10 12:11:26,899 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:11:26,899 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:11:26,899 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:11:26,900 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-10 12:11:26,900 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:11:26,906 INFO L793 eck$LassoCheckResult]: Stem: 17#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 15#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3#L26true assume !!(main_~x~0 <= 2147483646); 6#L27true call main_#t~ret6 := rec2(main_~x~0);< 5#rec2ENTRYtrue [2018-11-10 12:11:26,908 INFO L795 eck$LassoCheckResult]: Loop: 5#rec2ENTRYtrue ~j := #in~j; 23#L18true assume !(~j <= 0); 21#L20true call #t~ret3 := rec1(~j + 1);< 7#rec1ENTRYtrue ~i := #in~i; 12#L12true assume ~i <= 0;#res := 0; 8#rec1FINALtrue assume true; 16#rec1EXITtrue >#39#return; 25#L20-1true call #t~ret4 := rec2(#t~ret3);< 5#rec2ENTRYtrue [2018-11-10 12:11:26,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:11:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 1 times [2018-11-10 12:11:26,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:11:26,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:11:26,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:26,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:11:26,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:26,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:11:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -931063642, now seen corresponding path program 1 times [2018-11-10 12:11:26,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:11:26,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:11:26,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:26,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:11:26,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:11:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:11:27,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:11:27,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 12:11:27,029 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-11-10 12:11:27,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 12:11:27,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:11:27,042 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-10 12:11:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:11:27,108 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2018-11-10 12:11:27,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:11:27,110 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 36 transitions. [2018-11-10 12:11:27,112 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:11:27,117 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 18 states and 24 transitions. [2018-11-10 12:11:27,117 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2018-11-10 12:11:27,117 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-10 12:11:27,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2018-11-10 12:11:27,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-10 12:11:27,119 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2018-11-10 12:11:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2018-11-10 12:11:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 12:11:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 12:11:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2018-11-10 12:11:27,140 INFO L728 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2018-11-10 12:11:27,140 INFO L608 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2018-11-10 12:11:27,140 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-10 12:11:27,141 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 24 transitions. [2018-11-10 12:11:27,141 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:11:27,141 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:11:27,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:11:27,142 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-10 12:11:27,142 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:11:27,142 INFO L793 eck$LassoCheckResult]: Stem: 79#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 78#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 63#L26 assume !!(main_~x~0 <= 2147483646); 64#L27 call main_#t~ret6 := rec2(main_~x~0);< 65#rec2ENTRY [2018-11-10 12:11:27,142 INFO L795 eck$LassoCheckResult]: Loop: 65#rec2ENTRY ~j := #in~j; 67#L18 assume !(~j <= 0); 72#L20 call #t~ret3 := rec1(~j + 1);< 68#rec1ENTRY ~i := #in~i; 73#L12 assume !(~i <= 0); 69#L14 call #t~ret0 := rec1(~i - 2);< 68#rec1ENTRY ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#33#return; 70#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 68#rec1ENTRY ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#35#return; 71#L14-2 call #t~ret2 := rec1(#t~ret1);< 68#rec1ENTRY ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#37#return; 76#L14-3 #res := #t~ret2 + 1;havoc #t~ret2;havoc #t~ret0;havoc #t~ret1; 77#rec1FINAL assume true; 80#rec1EXIT >#39#return; 66#L20-1 call #t~ret4 := rec2(#t~ret3);< 65#rec2ENTRY [2018-11-10 12:11:27,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:11:27,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 2 times [2018-11-10 12:11:27,143 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:11:27,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:11:27,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:27,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:11:27,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:27,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:11:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1852060604, now seen corresponding path program 1 times [2018-11-10 12:11:27,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:11:27,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:11:27,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:27,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:11:27,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:27,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:11:27,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2035496338, now seen corresponding path program 1 times [2018-11-10 12:11:27,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:11:27,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:11:27,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:27,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:11:27,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:11:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:11:27,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 10.11 12:11:27 BoogieIcfgContainer [2018-11-10 12:11:27,482 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-10 12:11:27,483 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:11:27,483 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:11:27,483 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:11:27,483 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:11:26" (3/4) ... [2018-11-10 12:11:27,486 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-11-10 12:11:27,522 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a78ae9a9-f135-4db4-afca-762c36d82bf8/bin-2019/uautomizer/witness.graphml [2018-11-10 12:11:27,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:11:27,523 INFO L168 Benchmark]: Toolchain (without parser) took 1076.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 953.8 MB in the beginning and 1.1 GB in the end (delta: -112.0 MB). Peak memory consumption was 55.2 MB. Max. memory is 11.5 GB. [2018-11-10 12:11:27,525 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:11:27,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.43 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 942.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 12:11:27,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.68 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:11:27,526 INFO L168 Benchmark]: Boogie Preprocessor took 9.39 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:11:27,528 INFO L168 Benchmark]: RCFGBuilder took 198.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 939.3 MB in the beginning and 1.2 GB in the end (delta: -211.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-10 12:11:27,528 INFO L168 Benchmark]: BuchiAutomizer took 680.17 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: 81.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:11:27,529 INFO L168 Benchmark]: Witness Printer took 40.17 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-10 12:11:27,532 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.43 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 942.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.68 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.39 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 198.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 939.3 MB in the beginning and 1.2 GB in the end (delta: -211.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 680.17 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: 81.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.17 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: 3.3 MB). Peak memory consumption was 3.3 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 18 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.6s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 0.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 18 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 7 SDslu, 56 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@3dd3949d=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4e7758dc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5bb0b9a=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@445fa536=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] RET return 0; [L14] EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] RET return 0; [L14] EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] RET return 0; [L14] EXPR rec1(rec1(rec1(i-2) - 1)) [L14] RET return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] 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...