./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-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_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/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 cb528549fa76ae8087cf7043645dfa20323a0116 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 12:38:21,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 12:38:21,534 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 12:38:21,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 12:38:21,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 12:38:21,541 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 12:38:21,542 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 12:38:21,543 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 12:38:21,544 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 12:38:21,544 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 12:38:21,545 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 12:38:21,545 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 12:38:21,545 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 12:38:21,546 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 12:38:21,546 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 12:38:21,546 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 12:38:21,547 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 12:38:21,548 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 12:38:21,549 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 12:38:21,549 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 12:38:21,550 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 12:38:21,550 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 12:38:21,552 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 12:38:21,552 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 12:38:21,552 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 12:38:21,552 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 12:38:21,553 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 12:38:21,553 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 12:38:21,554 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 12:38:21,554 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 12:38:21,554 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 12:38:21,555 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 12:38:21,555 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 12:38:21,555 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 12:38:21,555 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 12:38:21,556 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 12:38:21,556 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-12-02 12:38:21,563 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 12:38:21,564 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 12:38:21,564 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 12:38:21,564 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 12:38:21,564 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 12:38:21,565 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-02 12:38:21,565 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-02 12:38:21,565 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-02 12:38:21,566 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-02 12:38:21,566 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 12:38:21,566 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-02 12:38:21,567 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-02 12:38:21,567 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_f6298b3b-588a-46f1-94ee-8253858a5f7f/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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2018-12-02 12:38:21,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 12:38:21,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 12:38:21,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 12:38:21,593 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 12:38:21,593 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 12:38:21,594 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-02 12:38:21,627 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/data/4dc20c4e1/14f17742264f4c4fbb10c840195d6ebf/FLAG0a8fa7a93 [2018-12-02 12:38:22,084 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 12:38:22,085 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-02 12:38:22,088 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/data/4dc20c4e1/14f17742264f4c4fbb10c840195d6ebf/FLAG0a8fa7a93 [2018-12-02 12:38:22,097 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/data/4dc20c4e1/14f17742264f4c4fbb10c840195d6ebf [2018-12-02 12:38:22,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 12:38:22,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 12:38:22,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 12:38:22,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 12:38:22,102 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 12:38:22,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf0f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22, skipping insertion in model container [2018-12-02 12:38:22,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 12:38:22,117 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 12:38:22,198 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 12:38:22,200 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 12:38:22,209 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 12:38:22,217 INFO L195 MainTranslator]: Completed translation [2018-12-02 12:38:22,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22 WrapperNode [2018-12-02 12:38:22,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 12:38:22,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 12:38:22,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 12:38:22,218 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 12:38:22,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 12:38:22,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 12:38:22,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 12:38:22,239 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 12:38:22,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... [2018-12-02 12:38:22,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 12:38:22,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 12:38:22,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 12:38:22,251 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 12:38:22,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/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 12:38:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-12-02 12:38:22,318 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-12-02 12:38:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-12-02 12:38:22,318 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-12-02 12:38:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 12:38:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 12:38:22,413 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 12:38:22,413 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-02 12:38:22,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:22 BoogieIcfgContainer [2018-12-02 12:38:22,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 12:38:22,414 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-02 12:38:22,414 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-02 12:38:22,418 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-02 12:38:22,418 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 12:38:22,418 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.12 12:38:22" (1/3) ... [2018-12-02 12:38:22,419 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7b8a3dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 12:38:22, skipping insertion in model container [2018-12-02 12:38:22,420 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 12:38:22,420 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:22" (2/3) ... [2018-12-02 12:38:22,420 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7b8a3dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 12:38:22, skipping insertion in model container [2018-12-02 12:38:22,420 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 12:38:22,420 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:22" (3/3) ... [2018-12-02 12:38:22,421 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-02 12:38:22,460 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 12:38:22,460 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-02 12:38:22,460 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-02 12:38:22,460 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-02 12:38:22,461 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 12:38:22,461 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 12:38:22,461 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-02 12:38:22,461 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 12:38:22,461 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-02 12:38:22,469 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-12-02 12:38:22,484 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:22,484 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:22,484 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:22,489 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-02 12:38:22,489 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:22,489 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-02 12:38:22,489 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-12-02 12:38:22,490 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:22,490 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:22,490 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:22,491 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-02 12:38:22,491 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:22,496 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-12-02 12:38:22,496 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2018-12-02 12:38:22,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-12-02 12:38:22,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:22,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:22,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:22,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:22,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:22,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2018-12-02 12:38:22,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:22,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:22,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:22,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:22,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:22,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2018-12-02 12:38:22,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:22,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:22,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:22,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:22,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:22,661 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:22,662 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:22,662 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:22,662 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:22,662 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:22,662 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,662 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:22,662 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:22,662 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-12-02 12:38:22,662 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:22,663 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:22,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,714 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:22,715 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,718 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:22,719 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:22,725 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:22,725 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 3 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,740 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:22,740 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:22,742 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:22,742 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 4 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,757 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:22,758 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:22,760 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:22,760 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,774 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:22,774 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:22,777 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:22,777 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 6 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,792 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:22,792 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,817 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:22,818 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:22,821 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:22,841 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:22,841 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:22,842 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:22,842 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:22,842 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:22,842 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:22,842 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:22,842 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:22,842 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-12-02 12:38:22,842 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:22,842 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:22,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:22,869 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:22,872 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:22,873 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:22,874 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:22,874 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:22,875 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:22,875 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:22,875 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:22,876 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:22,876 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:22,879 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:22,879 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:22,880 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:22,880 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:22,880 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:22,880 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:22,880 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:22,881 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:22,881 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:22,882 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:22,882 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:22,882 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:22,882 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:22,883 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:22,883 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:22,883 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:22,883 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:22,883 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:22,885 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:22,885 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:22,885 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:22,885 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:22,885 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:22,886 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:22,886 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:22,886 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:22,886 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:22,891 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:22,894 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 12:38:22,894 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 12:38:22,895 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:22,895 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:22,895 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:22,896 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-12-02 12:38:22,896 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:22,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:22,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:22,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:22,983 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 12:38:22,992 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2018-12-02 12:38:22,992 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2018-12-02 12:38:23,244 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2018-12-02 12:38:23,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 12:38:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2018-12-02 12:38:23,250 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2018-12-02 12:38:23,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2018-12-02 12:38:23,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,253 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2018-12-02 12:38:23,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,254 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2018-12-02 12:38:23,264 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:23,274 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2018-12-02 12:38:23,275 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2018-12-02 12:38:23,275 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2018-12-02 12:38:23,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2018-12-02 12:38:23,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:23,276 INFO L705 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2018-12-02 12:38:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2018-12-02 12:38:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2018-12-02 12:38:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-02 12:38:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2018-12-02 12:38:23,300 INFO L728 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2018-12-02 12:38:23,300 INFO L608 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2018-12-02 12:38:23,300 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-02 12:38:23,300 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2018-12-02 12:38:23,301 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:23,301 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:23,301 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:23,302 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:23,302 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-02 12:38:23,302 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2018-12-02 12:38:23,302 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2018-12-02 12:38:23,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2018-12-02 12:38:23,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:23,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:23,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:23,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-12-02 12:38:23,309 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:23,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:23,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:23,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,312 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2018-12-02 12:38:23,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:23,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:23,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:23,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,341 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:23,341 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:23,341 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:23,341 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:23,341 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:23,341 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,341 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:23,342 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:23,342 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-02 12:38:23,342 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:23,342 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:23,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,371 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:23,372 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,373 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,373 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,376 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:23,376 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 9 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,390 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,390 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,392 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:23,392 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 10 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,407 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,407 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,409 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:23,409 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 11 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,424 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,424 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,426 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:23,426 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,440 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,440 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,442 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:23,442 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 13 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,456 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,456 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 14 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,472 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:23,472 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,489 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:23,490 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:23,490 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:23,490 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:23,490 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:23,490 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:23,490 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,490 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:23,490 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:23,490 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-02 12:38:23,491 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:23,491 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:23,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,526 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:23,526 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:23,526 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,526 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,526 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,527 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,527 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,527 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,527 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,527 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,528 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:23,529 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,529 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,529 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,529 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,530 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,530 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,530 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,530 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,531 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:23,532 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,532 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,532 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,532 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,532 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,532 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,533 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,533 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,534 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:23,534 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,535 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,535 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,535 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,535 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,535 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,535 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,536 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,536 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:23,537 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,537 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,537 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,537 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,537 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,538 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,538 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,538 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,542 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:23,544 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-02 12:38:23,544 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-02 12:38:23,545 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:23,545 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:23,545 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:23,545 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-02 12:38:23,545 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:23,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:23,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:23,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:23,586 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 12:38:23,586 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-12-02 12:38:23,586 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2018-12-02 12:38:23,615 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2018-12-02 12:38:23,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-02 12:38:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2018-12-02 12:38:23,616 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2018-12-02 12:38:23,616 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,616 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2018-12-02 12:38:23,617 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,617 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2018-12-02 12:38:23,617 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,617 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2018-12-02 12:38:23,618 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:23,620 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2018-12-02 12:38:23,620 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2018-12-02 12:38:23,620 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2018-12-02 12:38:23,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2018-12-02 12:38:23,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:23,621 INFO L705 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2018-12-02 12:38:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2018-12-02 12:38:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-02 12:38:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-02 12:38:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2018-12-02 12:38:23,626 INFO L728 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2018-12-02 12:38:23,626 INFO L608 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2018-12-02 12:38:23,626 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-02 12:38:23,626 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2018-12-02 12:38:23,627 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:23,627 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:23,627 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:23,627 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:23,627 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-02 12:38:23,627 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2018-12-02 12:38:23,627 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2018-12-02 12:38:23,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2018-12-02 12:38:23,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:23,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:23,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:23,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-12-02 12:38:23,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:23,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:23,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:23,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:23,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2018-12-02 12:38:23,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:23,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:23,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:23,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 12:38:23,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:38:23,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 12:38:23,696 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:23,696 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:23,696 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:23,696 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:23,697 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:23,697 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,697 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:23,697 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:23,697 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-02 12:38:23,697 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:23,697 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:23,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,722 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:23,722 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,724 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,724 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,726 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:23,726 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 16 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,740 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:23,741 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,757 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:23,757 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:23,772 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:23,773 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:23,773 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:23,773 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:23,773 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:23,773 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:23,773 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:23,774 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:23,774 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:23,774 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-02 12:38:23,774 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:23,774 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:23,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:23,800 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:23,800 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:23,801 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,801 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,801 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,802 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,802 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,802 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,802 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,802 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,803 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:23,804 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:23,804 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:23,804 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:23,804 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:23,804 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:23,805 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:23,805 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:23,805 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:23,807 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:23,808 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-02 12:38:23,809 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-02 12:38:23,809 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:23,809 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:23,809 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:23,809 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-02 12:38:23,810 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:23,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:23,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:23,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:23,869 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 12:38:23,869 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 12:38:23,869 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2018-12-02 12:38:23,948 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2018-12-02 12:38:23,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 12:38:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2018-12-02 12:38:23,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2018-12-02 12:38:23,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2018-12-02 12:38:23,950 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,950 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2018-12-02 12:38:23,950 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:23,950 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2018-12-02 12:38:23,952 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:23,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2018-12-02 12:38:23,954 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2018-12-02 12:38:23,954 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2018-12-02 12:38:23,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2018-12-02 12:38:23,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:23,954 INFO L705 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2018-12-02 12:38:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2018-12-02 12:38:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2018-12-02 12:38:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-12-02 12:38:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2018-12-02 12:38:23,960 INFO L728 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2018-12-02 12:38:23,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 12:38:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-02 12:38:23,963 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2018-12-02 12:38:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:38:23,986 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2018-12-02 12:38:23,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 12:38:23,986 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2018-12-02 12:38:23,988 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-12-02 12:38:23,989 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2018-12-02 12:38:23,990 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-12-02 12:38:23,990 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2018-12-02 12:38:23,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2018-12-02 12:38:23,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:23,990 INFO L705 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2018-12-02 12:38:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2018-12-02 12:38:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2018-12-02 12:38:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-12-02 12:38:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2018-12-02 12:38:23,997 INFO L728 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2018-12-02 12:38:23,997 INFO L608 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2018-12-02 12:38:23,997 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-02 12:38:23,997 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2018-12-02 12:38:23,998 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 12:38:23,998 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:23,998 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:23,999 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:23,999 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:23,999 INFO L794 eck$LassoCheckResult]: Stem: 1162#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1163#L25 call main_#t~ret6 := rec2(main_~x~0);< 1170#rec2ENTRY ~j := #in~j; 1181#L18 assume !(~j <= 0); 1140#L20 call #t~ret3 := rec1(~j - 1);< 1180#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1176#rec1ENTRY ~i := #in~i; 1175#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1174#rec1ENTRY ~i := #in~i; 1178#L12 assume ~i <= 0;#res := 0; 1220#rec1FINAL assume true; 1160#rec1EXIT >#27#return; 1129#L14-1 [2018-12-02 12:38:23,999 INFO L796 eck$LassoCheckResult]: Loop: 1129#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1128#rec1ENTRY ~i := #in~i; 1131#L12 assume ~i <= 0;#res := 0; 1136#rec1FINAL assume true; 1137#rec1EXIT >#29#return; 1148#L14-2 call #t~ret2 := rec1(#t~ret1);< 1157#rec1ENTRY ~i := #in~i; 1200#L12 assume !(~i <= 0); 1149#L14 call #t~ret0 := rec1(~i - 2);< 1157#rec1ENTRY ~i := #in~i; 1200#L12 assume ~i <= 0;#res := 0; 1201#rec1FINAL assume true; 1209#rec1EXIT >#27#return; 1129#L14-1 [2018-12-02 12:38:23,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2018-12-02 12:38:23,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:24,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:24,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:24,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:24,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2018-12-02 12:38:24,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:24,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:24,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:24,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 12:38:24,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 12:38:24,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 12:38:24,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:24,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:38:24,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 12:38:24,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-02 12:38:24,052 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-02 12:38:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 12:38:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-02 12:38:24,053 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2018-12-02 12:38:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:38:24,087 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2018-12-02 12:38:24,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 12:38:24,087 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2018-12-02 12:38:24,088 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:24,090 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2018-12-02 12:38:24,091 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2018-12-02 12:38:24,091 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2018-12-02 12:38:24,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2018-12-02 12:38:24,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:24,091 INFO L705 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2018-12-02 12:38:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2018-12-02 12:38:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2018-12-02 12:38:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-12-02 12:38:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2018-12-02 12:38:24,097 INFO L728 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2018-12-02 12:38:24,097 INFO L608 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2018-12-02 12:38:24,097 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-02 12:38:24,097 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2018-12-02 12:38:24,098 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-02 12:38:24,098 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:24,098 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:24,099 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:24,100 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 12:38:24,100 INFO L794 eck$LassoCheckResult]: Stem: 1425#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; 1426#L25 call main_#t~ret6 := rec2(main_~x~0);< 1442#rec2ENTRY ~j := #in~j; 1453#L18 assume !(~j <= 0); 1411#L20 call #t~ret3 := rec1(~j - 1);< 1452#rec1ENTRY ~i := #in~i; 1451#L12 assume !(~i <= 0); 1406#L14 call #t~ret0 := rec1(~i - 2);< 1450#rec1ENTRY ~i := #in~i; 1419#L12 assume ~i <= 0;#res := 0; 1405#rec1FINAL assume true; 1407#rec1EXIT >#27#return; 1399#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1397#rec1ENTRY ~i := #in~i; 1400#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1488#rec1EXIT >#29#return; 1421#L14-2 call #t~ret2 := rec1(#t~ret1);< 1422#rec1ENTRY ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1485#rec1FINAL assume true; 1482#rec1EXIT >#31#return; 1415#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1416#rec1FINAL assume true; 1446#rec1EXIT >#33#return; 1392#L20-1 [2018-12-02 12:38:24,100 INFO L796 eck$LassoCheckResult]: Loop: 1392#L20-1 call #t~ret4 := rec2(#t~ret3);< 1391#rec2ENTRY ~j := #in~j; 1393#L18 assume !(~j <= 0); 1429#L20 call #t~ret3 := rec1(~j - 1);< 1434#rec1ENTRY ~i := #in~i; 1492#L12 assume !(~i <= 0); 1427#L14 call #t~ret0 := rec1(~i - 2);< 1434#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1487#rec1FINAL assume true; 1484#rec1EXIT >#27#return; 1398#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1397#rec1ENTRY ~i := #in~i; 1400#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1488#rec1EXIT >#29#return; 1483#L14-2 call #t~ret2 := rec1(#t~ret1);< 1422#rec1ENTRY ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1485#rec1FINAL assume true; 1482#rec1EXIT >#31#return; 1445#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1457#rec1FINAL assume true; 1443#rec1EXIT >#33#return; 1392#L20-1 [2018-12-02 12:38:24,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2018-12-02 12:38:24,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:24,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:24,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:24,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:24,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2018-12-02 12:38:24,112 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:24,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:24,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:24,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:24,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2018-12-02 12:38:24,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:24,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:24,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:24,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-12-02 12:38:24,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 12:38:24,189 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 12:38:24,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:24,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-12-02 12:38:24,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 12:38:24,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-02 12:38:24,349 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:24,349 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:24,349 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:24,349 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:24,349 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:24,349 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:24,349 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:24,349 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:24,349 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-12-02 12:38:24,350 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:24,350 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:24,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:24,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:24,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:24,375 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:24,375 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 20 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:24,376 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:24,376 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 21 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:24,396 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:24,396 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:26,764 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:26,767 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:26,767 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:26,767 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:26,767 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:26,767 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:26,767 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:26,767 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:26,767 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:26,767 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-12-02 12:38:26,767 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:26,767 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:26,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:26,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:26,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:26,798 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:26,799 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:26,799 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:26,799 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:26,799 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:26,800 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:26,800 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:26,800 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:26,800 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:26,800 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:26,800 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:26,800 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:26,801 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:26,801 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:26,801 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:26,801 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:26,801 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:26,801 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:26,801 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:26,802 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:26,802 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:26,802 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:26,802 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:26,802 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:26,802 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:26,802 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:26,803 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:26,803 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:26,805 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:26,808 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 12:38:26,808 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 12:38:26,808 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:26,809 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:26,809 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:26,809 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2018-12-02 12:38:26,809 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:26,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:26,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:26,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 12:38:26,944 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-12-02 12:38:26,944 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2018-12-02 12:38:27,196 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2018-12-02 12:38:27,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-02 12:38:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2018-12-02 12:38:27,197 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2018-12-02 12:38:27,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,197 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2018-12-02 12:38:27,198 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,198 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2018-12-02 12:38:27,198 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,198 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2018-12-02 12:38:27,205 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-12-02 12:38:27,212 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2018-12-02 12:38:27,212 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2018-12-02 12:38:27,213 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2018-12-02 12:38:27,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2018-12-02 12:38:27,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:27,213 INFO L705 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2018-12-02 12:38:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2018-12-02 12:38:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2018-12-02 12:38:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-02 12:38:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2018-12-02 12:38:27,231 INFO L728 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2018-12-02 12:38:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 12:38:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-02 12:38:27,231 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 10 states. [2018-12-02 12:38:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:38:27,352 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2018-12-02 12:38:27,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 12:38:27,352 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2018-12-02 12:38:27,356 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-12-02 12:38:27,360 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2018-12-02 12:38:27,360 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2018-12-02 12:38:27,361 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2018-12-02 12:38:27,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2018-12-02 12:38:27,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:27,361 INFO L705 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2018-12-02 12:38:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2018-12-02 12:38:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2018-12-02 12:38:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-02 12:38:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2018-12-02 12:38:27,371 INFO L728 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2018-12-02 12:38:27,371 INFO L608 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2018-12-02 12:38:27,371 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-02 12:38:27,371 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2018-12-02 12:38:27,373 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-12-02 12:38:27,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:27,374 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:27,375 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:27,375 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-02 12:38:27,375 INFO L794 eck$LassoCheckResult]: Stem: 3360#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; 3361#L25 call main_#t~ret6 := rec2(main_~x~0);< 3377#rec2ENTRY ~j := #in~j; 3400#L18 assume !(~j <= 0); 3339#L20 call #t~ret3 := rec1(~j - 1);< 3398#rec1ENTRY ~i := #in~i; 3413#L12 assume !(~i <= 0); 3409#L14 call #t~ret0 := rec1(~i - 2);< 3412#rec1ENTRY ~i := #in~i; 3417#L12 assume ~i <= 0;#res := 0; 3517#rec1FINAL assume true; 3514#rec1EXIT >#27#return; 3338#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3340#rec1ENTRY ~i := #in~i; 3516#L12 assume ~i <= 0;#res := 0; 3515#rec1FINAL assume true; 3511#rec1EXIT >#29#return; 3317#L14-2 call #t~ret2 := rec1(#t~ret1);< 3316#rec1ENTRY ~i := #in~i; 3319#L12 assume ~i <= 0;#res := 0; 3510#rec1FINAL assume true; 3509#rec1EXIT >#31#return; 3349#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 3350#rec1FINAL assume true; 3378#rec1EXIT >#33#return; 3379#L20-1 call #t~ret4 := rec2(#t~ret3);< 3498#rec2ENTRY ~j := #in~j; 3496#L18 assume !(~j <= 0); 3363#L20 call #t~ret3 := rec1(~j - 1);< 3493#rec1ENTRY ~i := #in~i; 3492#L12 assume !(~i <= 0); 3362#L14 call #t~ret0 := rec1(~i - 2);< 3365#rec1ENTRY [2018-12-02 12:38:27,375 INFO L796 eck$LassoCheckResult]: Loop: 3365#rec1ENTRY ~i := #in~i; 3466#L12 assume !(~i <= 0); 3447#L14 call #t~ret0 := rec1(~i - 2);< 3365#rec1ENTRY [2018-12-02 12:38:27,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2018-12-02 12:38:27,375 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:27,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:27,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:27,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:27,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-02 12:38:27,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 12:38:27,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 12:38:27,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 12:38:27,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 12:38:27,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 12:38:27,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-02 12:38:27,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 12:38:27,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-02 12:38:27,464 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 12:38:27,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2018-12-02 12:38:27,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:27,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:27,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:27,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:27,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:27,482 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:27,482 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:27,482 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:27,482 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:27,482 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:27,482 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:27,482 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:27,482 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:27,482 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-12-02 12:38:27,482 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:27,482 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:27,483 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,506 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:27,506 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 23 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:27,507 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:27,508 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:27,509 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:27,509 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 24 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:27,524 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:27,524 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 25 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:27,540 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:27,540 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:27,555 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:27,556 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:27,556 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:27,556 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:27,556 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:27,556 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:27,557 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:27,557 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:27,557 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:27,557 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-12-02 12:38:27,557 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:27,557 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:27,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:27,578 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:27,579 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:27,579 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:27,579 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:27,579 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:27,580 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:27,580 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:27,580 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:27,580 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:27,580 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:27,581 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:27,581 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:27,581 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:27,582 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:27,582 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:27,582 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:27,582 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:27,582 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:27,582 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:27,584 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:27,585 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-02 12:38:27,585 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-02 12:38:27,585 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:27,585 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:27,586 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:27,586 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-02 12:38:27,586 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:27,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,653 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 12:38:27,654 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 12:38:27,654 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-12-02 12:38:27,695 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2018-12-02 12:38:27,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 12:38:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-12-02 12:38:27,696 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-02 12:38:27,696 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,696 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 12:38:27,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,773 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 12:38:27,773 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 12:38:27,773 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-12-02 12:38:27,826 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2018-12-02 12:38:27,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 12:38:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-12-02 12:38:27,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-02 12:38:27,827 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,827 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 12:38:27,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:27,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:27,884 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 12:38:27,885 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 12:38:27,885 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-12-02 12:38:27,947 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2018-12-02 12:38:27,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 12:38:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-12-02 12:38:27,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-02 12:38:27,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2018-12-02 12:38:27,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2018-12-02 12:38:27,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:27,949 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2018-12-02 12:38:27,953 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2018-12-02 12:38:27,957 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2018-12-02 12:38:27,958 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2018-12-02 12:38:27,958 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2018-12-02 12:38:27,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2018-12-02 12:38:27,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:27,959 INFO L705 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2018-12-02 12:38:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2018-12-02 12:38:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2018-12-02 12:38:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-02 12:38:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2018-12-02 12:38:27,968 INFO L728 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2018-12-02 12:38:27,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 12:38:27,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-02 12:38:27,969 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2018-12-02 12:38:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:38:28,046 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2018-12-02 12:38:28,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 12:38:28,046 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2018-12-02 12:38:28,048 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-12-02 12:38:28,049 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2018-12-02 12:38:28,049 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2018-12-02 12:38:28,049 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2018-12-02 12:38:28,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2018-12-02 12:38:28,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:28,050 INFO L705 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2018-12-02 12:38:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2018-12-02 12:38:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2018-12-02 12:38:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-02 12:38:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2018-12-02 12:38:28,053 INFO L728 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2018-12-02 12:38:28,053 INFO L608 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2018-12-02 12:38:28,053 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-02 12:38:28,053 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2018-12-02 12:38:28,053 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-12-02 12:38:28,054 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:28,054 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:28,054 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:28,054 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-02 12:38:28,054 INFO L794 eck$LassoCheckResult]: Stem: 6075#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6076#L25 call main_#t~ret6 := rec2(main_~x~0);< 6080#rec2ENTRY ~j := #in~j; 6108#L18 assume !(~j <= 0); 6105#L20 call #t~ret3 := rec1(~j - 1);< 6107#rec1ENTRY ~i := #in~i; 6106#L12 assume !(~i <= 0); 6060#L14 call #t~ret0 := rec1(~i - 2);< 6082#rec1ENTRY ~i := #in~i; 6070#L12 assume !(~i <= 0); 6063#L14 [2018-12-02 12:38:28,054 INFO L796 eck$LassoCheckResult]: Loop: 6063#L14 call #t~ret0 := rec1(~i - 2);< 6113#rec1ENTRY ~i := #in~i; 6070#L12 assume !(~i <= 0); 6063#L14 [2018-12-02 12:38:28,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2018-12-02 12:38:28,055 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:28,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:28,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:28,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:28,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:28,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2018-12-02 12:38:28,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:28,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:28,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:28,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:28,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:28,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2018-12-02 12:38:28,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:28,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:28,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:28,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:28,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:28,085 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:28,085 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:28,085 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:28,085 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:28,085 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:28,085 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:28,085 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:28,085 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:28,085 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-12-02 12:38:28,085 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:28,085 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:28,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:28,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:28,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:28,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:28,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:28,115 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:28,115 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:28,117 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:28,117 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:28,136 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:28,136 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:30,816 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:30,818 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:30,818 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:30,818 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:30,818 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:30,818 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:30,818 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:30,819 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:30,819 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:30,819 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-12-02 12:38:30,819 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:30,819 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:30,819 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:30,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:30,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:30,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:30,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:30,847 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:30,848 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:30,848 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:30,848 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:30,848 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:30,848 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:30,848 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:30,848 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:30,849 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:30,849 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:30,850 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:30,851 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 12:38:30,852 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 12:38:30,852 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:30,852 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:30,852 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:30,852 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2018-12-02 12:38:30,852 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:30,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:30,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:30,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:30,893 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 12:38:30,893 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-12-02 12:38:30,893 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2018-12-02 12:38:30,911 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2018-12-02 12:38:30,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-02 12:38:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-12-02 12:38:30,911 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2018-12-02 12:38:30,911 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:30,911 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2018-12-02 12:38:30,911 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:30,912 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2018-12-02 12:38:30,912 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:30,912 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2018-12-02 12:38:30,912 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-12-02 12:38:30,913 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2018-12-02 12:38:30,913 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2018-12-02 12:38:30,914 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2018-12-02 12:38:30,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2018-12-02 12:38:30,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:30,914 INFO L705 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2018-12-02 12:38:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2018-12-02 12:38:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2018-12-02 12:38:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-02 12:38:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2018-12-02 12:38:30,917 INFO L728 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2018-12-02 12:38:30,917 INFO L608 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2018-12-02 12:38:30,917 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-02 12:38:30,918 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2018-12-02 12:38:30,918 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-12-02 12:38:30,918 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 12:38:30,918 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 12:38:30,919 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:38:30,919 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-12-02 12:38:30,919 INFO L794 eck$LassoCheckResult]: Stem: 6332#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6333#L25 call main_#t~ret6 := rec2(main_~x~0);< 6339#rec2ENTRY ~j := #in~j; 6338#L18 assume !(~j <= 0); 6334#L20 call #t~ret3 := rec1(~j - 1);< 6362#rec1ENTRY ~i := #in~i; 6363#L12 assume !(~i <= 0); 6318#L14 call #t~ret0 := rec1(~i - 2);< 6335#rec1ENTRY ~i := #in~i; 6366#L12 assume !(~i <= 0); 6301#L14 call #t~ret0 := rec1(~i - 2);< 6300#rec1ENTRY ~i := #in~i; 6302#L12 assume ~i <= 0;#res := 0; 6307#rec1FINAL assume true; 6308#rec1EXIT >#27#return; 6331#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6379#rec1ENTRY ~i := #in~i; 6381#L12 assume ~i <= 0;#res := 0; 6380#rec1FINAL assume true; 6378#rec1EXIT >#29#return; 6346#L14-2 call #t~ret2 := rec1(#t~ret1);< 6347#rec1ENTRY ~i := #in~i; 6361#L12 assume ~i <= 0;#res := 0; 6358#rec1FINAL assume true; 6351#rec1EXIT >#31#return; 6317#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6325#rec1FINAL assume true; 6350#rec1EXIT >#27#return; 6320#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6349#rec1ENTRY [2018-12-02 12:38:30,920 INFO L796 eck$LassoCheckResult]: Loop: 6349#rec1ENTRY ~i := #in~i; 6354#L12 assume !(~i <= 0); 6324#L14 call #t~ret0 := rec1(~i - 2);< 6353#rec1ENTRY ~i := #in~i; 6374#L12 assume !(~i <= 0); 6319#L14 call #t~ret0 := rec1(~i - 2);< 6336#rec1ENTRY ~i := #in~i; 6326#L12 assume ~i <= 0;#res := 0; 6327#rec1FINAL assume true; 6364#rec1EXIT >#27#return; 6331#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6379#rec1ENTRY ~i := #in~i; 6381#L12 assume ~i <= 0;#res := 0; 6380#rec1FINAL assume true; 6378#rec1EXIT >#29#return; 6346#L14-2 call #t~ret2 := rec1(#t~ret1);< 6347#rec1ENTRY ~i := #in~i; 6361#L12 assume ~i <= 0;#res := 0; 6358#rec1FINAL assume true; 6351#rec1EXIT >#31#return; 6317#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6325#rec1FINAL assume true; 6350#rec1EXIT >#27#return; 6321#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6349#rec1ENTRY [2018-12-02 12:38:30,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2018-12-02 12:38:30,920 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:30,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:30,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:30,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 12:38:30,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:30,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2018-12-02 12:38:30,929 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:30,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:30,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:30,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:30,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:38:30,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2018-12-02 12:38:30,937 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 12:38:30,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 12:38:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:30,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:38:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:38:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-12-02 12:38:30,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 12:38:30,962 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 12:38:30,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 12:38:30,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 12:38:30,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 12:38:30,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-12-02 12:38:30,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 12:38:30,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-02 12:38:31,128 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:31,128 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:31,128 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:31,128 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:31,129 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 12:38:31,129 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,129 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:31,129 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:31,129 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-12-02 12:38:31,129 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:31,129 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:31,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,152 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:31,152 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,153 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:31,154 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:31,155 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:31,155 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,169 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:31,170 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:31,171 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:31,171 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,186 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:31,186 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:31,187 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 12:38:31,187 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,202 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 12:38:31,202 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6298b3b-588a-46f1-94ee-8253858a5f7f/bin-2019/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,218 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 12:38:31,218 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 12:38:31,221 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 12:38:31,234 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 12:38:31,234 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 12:38:31,234 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 12:38:31,234 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 12:38:31,234 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 12:38:31,234 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 12:38:31,235 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 12:38:31,235 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 12:38:31,235 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-12-02 12:38:31,235 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 12:38:31,235 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 12:38:31,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 12:38:31,276 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 12:38:31,276 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 12:38:31,277 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:31,277 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:31,277 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:31,277 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:31,277 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:31,277 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:31,278 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:31,278 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:31,278 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:31,278 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:31,279 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:31,279 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:31,279 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:31,279 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:31,279 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:31,279 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:31,279 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:31,280 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 12:38:31,280 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 12:38:31,280 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 12:38:31,280 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 12:38:31,281 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 12:38:31,281 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 12:38:31,281 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 12:38:31,281 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 12:38:31,281 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 12:38:31,282 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 12:38:31,283 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 12:38:31,283 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 12:38:31,284 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 12:38:31,284 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 12:38:31,284 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 12:38:31,284 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-02 12:38:31,284 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 12:38:31,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 12:38:31,409 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-12-02 12:38:31,409 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-12-02 12:38:31,443 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2018-12-02 12:38:31,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-02 12:38:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-12-02 12:38:31,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2018-12-02 12:38:31,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:31,444 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 12:38:31,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 12:38:31,562 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-12-02 12:38:31,562 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-12-02 12:38:31,598 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2018-12-02 12:38:31,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-02 12:38:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-12-02 12:38:31,598 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2018-12-02 12:38:31,598 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:31,598 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 12:38:31,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 12:38:31,707 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-12-02 12:38:31,707 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-12-02 12:38:31,883 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2018-12-02 12:38:31,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-02 12:38:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2018-12-02 12:38:31,883 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2018-12-02 12:38:31,884 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:31,884 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 12:38:31,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:38:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:38:31,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:38:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 12:38:32,012 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-12-02 12:38:32,012 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-12-02 12:38:32,273 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2018-12-02 12:38:32,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2018-12-02 12:38:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-02 12:38:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2018-12-02 12:38:32,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2018-12-02 12:38:32,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:32,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2018-12-02 12:38:32,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:32,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2018-12-02 12:38:32,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 12:38:32,276 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2018-12-02 12:38:32,278 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2018-12-02 12:38:32,279 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2018-12-02 12:38:32,280 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-12-02 12:38:32,280 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2018-12-02 12:38:32,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2018-12-02 12:38:32,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 12:38:32,280 INFO L705 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2018-12-02 12:38:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2018-12-02 12:38:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2018-12-02 12:38:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-12-02 12:38:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2018-12-02 12:38:32,284 INFO L728 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2018-12-02 12:38:32,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 12:38:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-02 12:38:32,285 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 8 states. [2018-12-02 12:38:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:38:32,319 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-12-02 12:38:32,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 12:38:32,320 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2018-12-02 12:38:32,320 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-02 12:38:32,321 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2018-12-02 12:38:32,321 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-02 12:38:32,321 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-02 12:38:32,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-02 12:38:32,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-02 12:38:32,321 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 12:38:32,321 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 12:38:32,321 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 12:38:32,321 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-12-02 12:38:32,321 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-02 12:38:32,321 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-02 12:38:32,321 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-02 12:38:32,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.12 12:38:32 BoogieIcfgContainer [2018-12-02 12:38:32,327 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-02 12:38:32,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 12:38:32,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 12:38:32,328 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 12:38:32,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:22" (3/4) ... [2018-12-02 12:38:32,331 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 12:38:32,331 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 12:38:32,332 INFO L168 Benchmark]: Toolchain (without parser) took 10233.04 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 326.6 MB). Free memory was 962.4 MB in the beginning and 1.2 GB in the end (delta: -244.7 MB). Peak memory consumption was 82.0 MB. Max. memory is 11.5 GB. [2018-12-02 12:38:32,333 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:38:32,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.75 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 12:38:32,334 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:38:32,334 INFO L168 Benchmark]: Boogie Preprocessor took 11.79 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-02 12:38:32,334 INFO L168 Benchmark]: RCFGBuilder took 163.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -174.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-12-02 12:38:32,335 INFO L168 Benchmark]: BuchiAutomizer took 9912.71 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 186.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -86.8 MB). Peak memory consumption was 99.8 MB. Max. memory is 11.5 GB. [2018-12-02 12:38:32,335 INFO L168 Benchmark]: Witness Printer took 3.86 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:38:32,337 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.75 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 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 20.52 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.79 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -174.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 9912.71 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 186.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -86.8 MB). Peak memory consumption was 99.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.86 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 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 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@285d3578 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.8s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 6.9s. Construction of modules took 0.5s. Büchi inclusion checks took 2.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 288 SDtfs, 336 SDslu, 538 SDs, 0 SdLazy, 951 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...