./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 0837a1e1d82be1b28ccf3514392f1b01c88a9160 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:08:22,851 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:08:22,852 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:08:22,860 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:08:22,861 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:08:22,861 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:08:22,862 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:08:22,863 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:08:22,864 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:08:22,865 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:08:22,866 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:08:22,866 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:08:22,866 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:08:22,867 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:08:22,868 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:08:22,868 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:08:22,869 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:08:22,870 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:08:22,871 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:08:22,872 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:08:22,873 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:08:22,874 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:08:22,875 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:08:22,876 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:08:22,876 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:08:22,876 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:08:22,877 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:08:22,878 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:08:22,878 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:08:22,879 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:08:22,880 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:08:22,880 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:08:22,880 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:08:22,880 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:08:22,881 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:08:22,882 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:08:22,882 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-10-27 06:08:22,896 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:08:22,897 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:08:22,898 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 06:08:22,899 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 06:08:22,899 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 06:08:22,899 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * Use old map elimination=false [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-10-27 06:08:22,900 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 06:08:22,900 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-10-27 06:08:22,901 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-10-27 06:08:22,902 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:08:22,902 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:08:22,902 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-10-27 06:08:22,902 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:08:22,902 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 06:08:22,902 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-10-27 06:08:22,903 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-27 06:08:22,903 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2018-10-27 06:08:22,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:08:22,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:08:22,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:08:22,948 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:08:22,948 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:08:22,949 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-10-27 06:08:22,990 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/data/16674860a/f43dfea2d4b544f79bbc55ab97b4834a/FLAG510e9d42d [2018-10-27 06:08:23,387 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:08:23,387 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-10-27 06:08:23,393 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/data/16674860a/f43dfea2d4b544f79bbc55ab97b4834a/FLAG510e9d42d [2018-10-27 06:08:23,405 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/data/16674860a/f43dfea2d4b544f79bbc55ab97b4834a [2018-10-27 06:08:23,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:08:23,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 06:08:23,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:08:23,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:08:23,418 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:08:23,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29b7c699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23, skipping insertion in model container [2018-10-27 06:08:23,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:08:23,447 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:08:23,586 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:08:23,589 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:08:23,602 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:08:23,614 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:08:23,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23 WrapperNode [2018-10-27 06:08:23,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:08:23,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:08:23,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:08:23,616 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:08:23,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:08:23,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:08:23,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:08:23,644 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:08:23,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... [2018-10-27 06:08:23,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:08:23,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:08:23,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:08:23,661 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:08:23,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-10-27 06:08:23,782 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-10-27 06:08:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-10-27 06:08:23,782 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-10-27 06:08:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:08:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:08:24,012 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:08:24,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:08:24 BoogieIcfgContainer [2018-10-27 06:08:24,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:08:24,013 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-10-27 06:08:24,014 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-10-27 06:08:24,017 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-10-27 06:08:24,018 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:08:24,018 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.10 06:08:23" (1/3) ... [2018-10-27 06:08:24,019 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4c9f8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:08:24, skipping insertion in model container [2018-10-27 06:08:24,019 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:08:24,019 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:08:23" (2/3) ... [2018-10-27 06:08:24,019 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4c9f8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:08:24, skipping insertion in model container [2018-10-27 06:08:24,019 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:08:24,020 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:08:24" (3/3) ... [2018-10-27 06:08:24,023 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-10-27 06:08:24,083 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 06:08:24,084 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-10-27 06:08:24,084 INFO L375 BuchiCegarLoop]: Hoare is false [2018-10-27 06:08:24,084 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-10-27 06:08:24,084 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:08:24,084 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:08:24,084 INFO L379 BuchiCegarLoop]: Difference is false [2018-10-27 06:08:24,084 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:08:24,084 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-10-27 06:08:24,097 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-10-27 06:08:24,122 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:24,122 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:24,122 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:24,130 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:08:24,130 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:24,130 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-10-27 06:08:24,130 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-10-27 06:08:24,133 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:24,133 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:24,133 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:24,133 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:08:24,133 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:24,141 INFO L793 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 23#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-10-27 06:08:24,141 INFO L795 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 21#L18true assume !(~j <= 0); 19#L20true call #t~ret3 := rec1(~j);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 13#rec1EXITtrue >#34#return; 24#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 3#rec2ENTRYtrue [2018-10-27 06:08:24,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:24,147 INFO L82 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2018-10-27 06:08:24,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:24,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:24,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:24,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2018-10-27 06:08:24,215 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:24,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:24,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:24,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:08:24,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:08:24,368 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:08:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 06:08:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 06:08:24,388 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2018-10-27 06:08:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:24,533 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-27 06:08:24,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 06:08:24,535 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 34 transitions. [2018-10-27 06:08:24,539 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:24,546 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2018-10-27 06:08:24,547 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-10-27 06:08:24,547 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-10-27 06:08:24,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2018-10-27 06:08:24,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:08:24,550 INFO L705 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-10-27 06:08:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2018-10-27 06:08:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-27 06:08:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 06:08:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2018-10-27 06:08:24,578 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-10-27 06:08:24,578 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-10-27 06:08:24,578 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-10-27 06:08:24,578 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2018-10-27 06:08:24,579 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:24,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:24,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:24,581 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:08:24,581 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:24,581 INFO L793 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 75#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 62#L25 call main_#t~ret6 := rec2(main_~x~0);< 61#rec2ENTRY [2018-10-27 06:08:24,582 INFO L795 eck$LassoCheckResult]: Loop: 61#rec2ENTRY ~j := #in~j; 64#L18 assume !(~j <= 0); 69#L20 call #t~ret3 := rec1(~j);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume !(~i <= 0); 66#L14 call #t~ret0 := rec1(~i - 2);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume ~i <= 0;#res := 0; 71#rec1FINAL assume true; 72#rec1EXIT >#28#return; 67#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume ~i <= 0;#res := 0; 71#rec1FINAL assume true; 72#rec1EXIT >#30#return; 68#L14-2 call #t~ret2 := rec1(#t~ret1);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume ~i <= 0;#res := 0; 71#rec1FINAL assume true; 72#rec1EXIT >#32#return; 73#L14-3 #res := #t~ret2 + 1;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 74#rec1FINAL assume true; 77#rec1EXIT >#34#return; 63#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 61#rec2ENTRY [2018-10-27 06:08:24,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 2 times [2018-10-27 06:08:24,582 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:24,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:24,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:24,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash -204878921, now seen corresponding path program 1 times [2018-10-27 06:08:24,587 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:24,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:24,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:24,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -482494696, now seen corresponding path program 1 times [2018-10-27 06:08:24,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:24,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:24,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:24,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:25,215 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2018-10-27 06:08:25,518 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-10-27 06:08:25,658 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-27 06:08:25,725 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:25,728 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:25,728 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:25,728 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:25,728 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:08:25,728 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:25,729 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:25,729 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:25,729 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-10-27 06:08:25,729 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:25,729 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:25,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:25,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:25,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:25,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:25,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:25,844 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:25,845 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:25,854 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:25,854 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:25,864 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:25,864 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:25,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:25,908 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:25,922 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:25,922 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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) [2018-10-27 06:08:25,957 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:25,957 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:25,970 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:25,970 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:26,007 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:26,007 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:26,037 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:26,037 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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) [2018-10-27 06:08:26,074 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:26,074 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:26,120 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:08:26,121 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:26,161 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:08:26,162 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:26,163 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:26,163 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:26,163 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:26,163 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:08:26,163 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:26,163 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:26,163 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:26,163 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-10-27 06:08:26,164 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:26,164 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:26,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:26,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:26,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:26,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:26,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:26,247 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:26,251 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:08:26,252 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 [2018-10-27 06:08:26,253 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:26,254 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:26,254 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:26,254 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:26,255 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:26,256 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:26,256 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:26,259 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:26,259 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 [2018-10-27 06:08:26,260 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:26,260 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:26,260 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:26,260 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:26,260 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:26,261 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:26,261 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:26,262 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:26,263 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 [2018-10-27 06:08:26,263 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:26,263 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:26,264 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:26,264 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:26,264 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:26,264 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:26,265 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:26,268 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:26,269 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 [2018-10-27 06:08:26,269 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:26,269 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:26,270 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:26,270 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:26,270 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:26,271 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:26,271 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:26,276 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:08:26,280 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:08:26,280 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:08:26,283 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:08:26,283 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:08:26,283 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:08:26,284 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-10-27 06:08:26,286 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:08:26,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:26,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:26,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 06:08:26,884 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2018-10-27 06:08:26,885 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8 Second operand 9 states. [2018-10-27 06:08:27,849 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 102 states and 148 transitions. Complement of second has 42 states. [2018-10-27 06:08:27,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2018-10-27 06:08:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-27 06:08:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2018-10-27 06:08:27,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 24 letters. [2018-10-27 06:08:27,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:27,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 27 letters. Loop has 24 letters. [2018-10-27 06:08:27,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:27,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 48 letters. [2018-10-27 06:08:27,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:27,861 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 148 transitions. [2018-10-27 06:08:27,869 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:27,874 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 90 states and 136 transitions. [2018-10-27 06:08:27,874 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2018-10-27 06:08:27,875 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-10-27 06:08:27,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 136 transitions. [2018-10-27 06:08:27,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:27,876 INFO L705 BuchiCegarLoop]: Abstraction has 90 states and 136 transitions. [2018-10-27 06:08:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states and 136 transitions. [2018-10-27 06:08:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2018-10-27 06:08:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-27 06:08:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2018-10-27 06:08:27,894 INFO L728 BuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2018-10-27 06:08:27,894 INFO L608 BuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2018-10-27 06:08:27,895 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-10-27 06:08:27,895 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 99 transitions. [2018-10-27 06:08:27,897 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:27,897 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:27,897 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:27,899 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:27,899 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:08:27,900 INFO L793 eck$LassoCheckResult]: Stem: 381#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 377#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 341#L25 call main_#t~ret6 := rec2(main_~x~0);< 340#rec2ENTRY ~j := #in~j; 343#L18 assume !(~j <= 0); 369#L20 call #t~ret3 := rec1(~j);< 390#rec1ENTRY ~i := #in~i; 374#L12 assume !(~i <= 0); 350#L14 call #t~ret0 := rec1(~i - 2);< 346#rec1ENTRY [2018-10-27 06:08:27,900 INFO L795 eck$LassoCheckResult]: Loop: 346#rec1ENTRY ~i := #in~i; 354#L12 assume !(~i <= 0); 347#L14 call #t~ret0 := rec1(~i - 2);< 346#rec1ENTRY [2018-10-27 06:08:27,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:27,900 INFO L82 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2018-10-27 06:08:27,900 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:27,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:27,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:27,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:27,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:27,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2018-10-27 06:08:27,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:27,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:27,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:27,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2018-10-27 06:08:27,923 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:27,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:27,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:27,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:27,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:27,972 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:27,972 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:27,972 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:27,973 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:27,973 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:08:27,973 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:27,973 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:27,973 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:27,973 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-10-27 06:08:27,973 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:27,973 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:27,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:27,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:27,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:27,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:27,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:27,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,017 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:28,017 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,021 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,022 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,026 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,026 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,046 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,047 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,049 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,049 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,071 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,072 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,074 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,074 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,096 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,096 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,100 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,100 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,122 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,122 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,146 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:08:28,146 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,169 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:08:28,171 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:28,171 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:28,171 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:28,171 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:28,171 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:08:28,171 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:28,172 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:28,172 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:28,172 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-10-27 06:08:28,172 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:28,172 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:28,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,282 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:28,282 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:08:28,282 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 [2018-10-27 06:08:28,283 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,283 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,284 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,284 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,284 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,285 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,285 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,288 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:28,289 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 [2018-10-27 06:08:28,289 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,290 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,290 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,290 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,290 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,291 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,291 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,292 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:28,292 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 [2018-10-27 06:08:28,293 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,293 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,293 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,297 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,297 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,299 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,299 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,300 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:28,301 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 [2018-10-27 06:08:28,302 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,302 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,302 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,302 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,302 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,303 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,303 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,311 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:08:28,313 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-10-27 06:08:28,313 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:08:28,314 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:08:28,314 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:08:28,314 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:08:28,314 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-10-27 06:08:28,315 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:08:28,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:28,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:28,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:28,416 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 [2018-10-27 06:08:28,417 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40 Second operand 4 states. [2018-10-27 06:08:28,462 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40. Second operand 4 states. Result 109 states and 166 transitions. Complement of second has 13 states. [2018-10-27 06:08:28,463 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 [2018-10-27 06:08:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-27 06:08:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2018-10-27 06:08:28,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 3 letters. [2018-10-27 06:08:28,464 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:28,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 3 letters. [2018-10-27 06:08:28,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:28,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 6 letters. [2018-10-27 06:08:28,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:28,465 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 166 transitions. [2018-10-27 06:08:28,469 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:28,474 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 97 states and 154 transitions. [2018-10-27 06:08:28,474 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2018-10-27 06:08:28,474 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2018-10-27 06:08:28,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 154 transitions. [2018-10-27 06:08:28,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:28,475 INFO L705 BuchiCegarLoop]: Abstraction has 97 states and 154 transitions. [2018-10-27 06:08:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 154 transitions. [2018-10-27 06:08:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2018-10-27 06:08:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-27 06:08:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2018-10-27 06:08:28,491 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2018-10-27 06:08:28,491 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2018-10-27 06:08:28,491 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-10-27 06:08:28,491 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 144 transitions. [2018-10-27 06:08:28,495 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:28,495 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:28,495 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:28,496 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:28,496 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:08:28,496 INFO L793 eck$LassoCheckResult]: Stem: 625#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 622#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 623#L25 call main_#t~ret6 := rec2(main_~x~0);< 629#rec2ENTRY ~j := #in~j; 655#L18 assume !(~j <= 0); 588#L20 call #t~ret3 := rec1(~j);< 587#rec1ENTRY ~i := #in~i; 589#L12 assume !(~i <= 0); 608#L14 call #t~ret0 := rec1(~i - 2);< 626#rec1ENTRY ~i := #in~i; 647#L12 assume ~i <= 0;#res := 0; 646#rec1FINAL assume true; 643#rec1EXIT >#28#return; 613#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 615#rec1ENTRY [2018-10-27 06:08:28,496 INFO L795 eck$LassoCheckResult]: Loop: 615#rec1ENTRY ~i := #in~i; 642#L12 assume !(~i <= 0); 609#L14 call #t~ret0 := rec1(~i - 2);< 615#rec1ENTRY [2018-10-27 06:08:28,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2018-10-27 06:08:28,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:28,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:28,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:28,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:28,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:28,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:28,511 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2018-10-27 06:08:28,512 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:28,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:28,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:28,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:28,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2018-10-27 06:08:28,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:28,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:28,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:28,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:28,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 06:08:28,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:08:28,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 06:08:28,592 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:28,592 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:28,592 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:28,592 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:28,592 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:08:28,592 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:28,592 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:28,592 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:28,592 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-10-27 06:08:28,592 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:28,593 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:28,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,629 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:28,629 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,633 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,633 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,635 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,635 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,656 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,656 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,659 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,659 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,679 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,679 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,682 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:28,682 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:28,703 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:28,703 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/z3 Starting monitored process 18 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:28,726 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:08:28,726 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:28,747 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:08:28,748 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:28,748 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:28,748 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:28,748 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:28,748 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:08:28,748 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:28,749 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:28,749 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:28,749 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-10-27 06:08:28,749 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:28,749 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:28,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:28,836 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:28,837 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:08:28,837 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 [2018-10-27 06:08:28,837 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,838 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,838 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,838 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,838 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,838 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,839 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,840 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:28,840 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 [2018-10-27 06:08:28,840 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,841 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,841 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,841 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,841 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,845 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,846 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,846 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:28,847 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 [2018-10-27 06:08:28,847 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:28,847 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:28,847 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:28,848 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:28,848 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:28,848 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:28,848 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:28,856 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:08:28,858 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-10-27 06:08:28,858 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:08:28,858 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:08:28,858 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:08:28,859 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:08:28,859 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-10-27 06:08:28,859 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:08:28,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:28,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:28,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:28,966 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 [2018-10-27 06:08:28,967 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57 Second operand 5 states. [2018-10-27 06:08:29,080 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57. Second operand 5 states. Result 133 states and 208 transitions. Complement of second has 14 states. [2018-10-27 06:08:29,085 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 [2018-10-27 06:08:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2018-10-27 06:08:29,086 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 3 letters. [2018-10-27 06:08:29,087 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:29,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 17 letters. Loop has 3 letters. [2018-10-27 06:08:29,087 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:29,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 6 letters. [2018-10-27 06:08:29,087 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:29,088 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 208 transitions. [2018-10-27 06:08:29,098 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:29,104 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 121 states and 196 transitions. [2018-10-27 06:08:29,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2018-10-27 06:08:29,110 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2018-10-27 06:08:29,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 196 transitions. [2018-10-27 06:08:29,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:29,110 INFO L705 BuchiCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-10-27 06:08:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 196 transitions. [2018-10-27 06:08:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2018-10-27 06:08:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-27 06:08:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 186 transitions. [2018-10-27 06:08:29,133 INFO L728 BuchiCegarLoop]: Abstraction has 117 states and 186 transitions. [2018-10-27 06:08:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:08:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:08:29,133 INFO L87 Difference]: Start difference. First operand 117 states and 186 transitions. Second operand 6 states. [2018-10-27 06:08:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:29,198 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2018-10-27 06:08:29,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 06:08:29,199 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 130 states and 196 transitions. [2018-10-27 06:08:29,202 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-10-27 06:08:29,206 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 130 states to 128 states and 194 transitions. [2018-10-27 06:08:29,207 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 60 [2018-10-27 06:08:29,207 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2018-10-27 06:08:29,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 194 transitions. [2018-10-27 06:08:29,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:29,208 INFO L705 BuchiCegarLoop]: Abstraction has 128 states and 194 transitions. [2018-10-27 06:08:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 194 transitions. [2018-10-27 06:08:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2018-10-27 06:08:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-27 06:08:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2018-10-27 06:08:29,222 INFO L728 BuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2018-10-27 06:08:29,222 INFO L608 BuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2018-10-27 06:08:29,222 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-10-27 06:08:29,222 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 158 transitions. [2018-10-27 06:08:29,224 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:08:29,224 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:29,224 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:29,225 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:29,225 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:29,227 INFO L793 eck$LassoCheckResult]: Stem: 1201#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1197#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1198#L25 call main_#t~ret6 := rec2(main_~x~0);< 1205#rec2ENTRY ~j := #in~j; 1218#L18 assume !(~j <= 0); 1194#L20 call #t~ret3 := rec1(~j);< 1217#rec1ENTRY ~i := #in~i; 1216#L12 assume !(~i <= 0); 1165#L14 call #t~ret0 := rec1(~i - 2);< 1215#rec1ENTRY ~i := #in~i; 1213#L12 assume !(~i <= 0); 1169#L14 call #t~ret0 := rec1(~i - 2);< 1212#rec1ENTRY ~i := #in~i; 1214#L12 assume ~i <= 0;#res := 0; 1254#rec1FINAL assume true; 1199#rec1EXIT >#28#return; 1158#L14-1 [2018-10-27 06:08:29,228 INFO L795 eck$LassoCheckResult]: Loop: 1158#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1156#rec1ENTRY ~i := #in~i; 1159#L12 assume ~i <= 0;#res := 0; 1253#rec1FINAL assume true; 1251#rec1EXIT >#30#return; 1171#L14-2 call #t~ret2 := rec1(#t~ret1);< 1195#rec1ENTRY ~i := #in~i; 1250#L12 assume !(~i <= 0); 1173#L14 call #t~ret0 := rec1(~i - 2);< 1195#rec1ENTRY ~i := #in~i; 1250#L12 assume ~i <= 0;#res := 0; 1249#rec1FINAL assume true; 1248#rec1EXIT >#28#return; 1158#L14-1 [2018-10-27 06:08:29,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2018-10-27 06:08:29,228 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:29,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:29,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:29,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:29,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2018-10-27 06:08:29,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:29,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:29,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:29,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 06:08:29,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:08:29,485 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:29,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:29,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:29,519 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:08:29,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-10-27 06:08:29,519 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:08:29,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:08:29,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:08:29,520 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. cyclomatic complexity: 59 Second operand 6 states. [2018-10-27 06:08:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:29,559 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2018-10-27 06:08:29,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 06:08:29,568 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 120 states and 174 transitions. [2018-10-27 06:08:29,571 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:29,574 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 120 states to 115 states and 165 transitions. [2018-10-27 06:08:29,574 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2018-10-27 06:08:29,574 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2018-10-27 06:08:29,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 165 transitions. [2018-10-27 06:08:29,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:29,575 INFO L705 BuchiCegarLoop]: Abstraction has 115 states and 165 transitions. [2018-10-27 06:08:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states and 165 transitions. [2018-10-27 06:08:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-10-27 06:08:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-27 06:08:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2018-10-27 06:08:29,587 INFO L728 BuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2018-10-27 06:08:29,587 INFO L608 BuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2018-10-27 06:08:29,587 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-10-27 06:08:29,587 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 162 transitions. [2018-10-27 06:08:29,589 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-10-27 06:08:29,589 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:29,589 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:29,593 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:29,593 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:08:29,593 INFO L793 eck$LassoCheckResult]: Stem: 1477#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1475#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1427#L25 call main_#t~ret6 := rec2(main_~x~0);< 1426#rec2ENTRY ~j := #in~j; 1428#L18 assume !(~j <= 0); 1478#L20 call #t~ret3 := rec1(~j);< 1480#rec1ENTRY ~i := #in~i; 1509#L12 assume !(~i <= 0); 1434#L14 call #t~ret0 := rec1(~i - 2);< 1433#rec1ENTRY ~i := #in~i; 1435#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1490#rec1ENTRY ~i := #in~i; 1466#L12 assume ~i <= 0;#res := 0; 1467#rec1FINAL assume true; 1493#rec1EXIT >#28#return; 1453#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1454#rec1ENTRY ~i := #in~i; 1500#L12 assume ~i <= 0;#res := 0; 1499#rec1FINAL assume true; 1492#rec1EXIT >#30#return; 1469#L14-2 call #t~ret2 := rec1(#t~ret1);< 1470#rec1ENTRY ~i := #in~i; 1511#L12 assume ~i <= 0;#res := 0; 1510#rec1FINAL assume true; 1476#rec1EXIT >#32#return; 1463#L14-3 #res := #t~ret2 + 1;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 1440#rec1FINAL assume true; 1449#rec1EXIT >#28#return; 1441#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1489#rec1ENTRY [2018-10-27 06:08:29,593 INFO L795 eck$LassoCheckResult]: Loop: 1489#rec1ENTRY ~i := #in~i; 1498#L12 assume !(~i <= 0); 1443#L14 call #t~ret0 := rec1(~i - 2);< 1489#rec1ENTRY [2018-10-27 06:08:29,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2018-10-27 06:08:29,593 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:29,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:29,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:29,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:29,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2018-10-27 06:08:29,617 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:29,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:08:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:29,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1475637376, now seen corresponding path program 2 times [2018-10-27 06:08:29,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:29,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:29,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:29,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-27 06:08:29,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:08:29,678 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:08:29,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:08:29,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 06:08:29,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:08:29,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-27 06:08:29,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:08:29,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-27 06:08:29,795 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:29,795 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:29,796 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:29,796 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:29,796 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:08:29,796 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:29,796 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:29,796 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:29,796 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-10-27 06:08:29,796 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:29,796 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:29,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,833 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:29,834 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:29,847 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:29,847 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:29,852 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:29,852 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/z3 Starting monitored process 22 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:29,875 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:29,875 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:29,877 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:29,877 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:29,899 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:29,899 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:29,909 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:29,910 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:29,931 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:29,931 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:29,955 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:08:29,955 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:29,977 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:08:29,979 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:29,979 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:29,979 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:29,979 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:29,979 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:08:29,979 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:29,979 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:29,979 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:29,979 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-10-27 06:08:29,980 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:29,980 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:29,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:29,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:30,015 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:30,016 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:08:30,016 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 [2018-10-27 06:08:30,016 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:30,017 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:30,017 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:30,017 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:30,017 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:30,017 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:30,017 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:30,018 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:30,019 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 [2018-10-27 06:08:30,019 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:30,019 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:30,019 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:30,019 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:30,020 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:30,020 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:30,020 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:30,021 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:30,030 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 [2018-10-27 06:08:30,030 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:30,030 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:30,031 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:30,031 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:30,031 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:30,031 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:30,031 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:30,034 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:08:30,036 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-10-27 06:08:30,036 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:08:30,036 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:08:30,036 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:08:30,037 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:08:30,037 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-10-27 06:08:30,037 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:08:30,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:30,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:30,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:30,176 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 [2018-10-27 06:08:30,176 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-10-27 06:08:30,277 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 129 states and 180 transitions. Complement of second has 7 states. [2018-10-27 06:08:30,281 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 [2018-10-27 06:08:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-10-27 06:08:30,282 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2018-10-27 06:08:30,282 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:30,282 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:08:30,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:30,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:30,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:30,809 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 [2018-10-27 06:08:30,809 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-10-27 06:08:30,919 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 129 states and 180 transitions. Complement of second has 7 states. [2018-10-27 06:08:30,922 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 [2018-10-27 06:08:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-10-27 06:08:30,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2018-10-27 06:08:30,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:30,923 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:08:31,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:31,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:31,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:31,106 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 [2018-10-27 06:08:31,107 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-10-27 06:08:31,240 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 157 states and 219 transitions. Complement of second has 13 states. [2018-10-27 06:08:31,242 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 [2018-10-27 06:08:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2018-10-27 06:08:31,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2018-10-27 06:08:31,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:31,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2018-10-27 06:08:31,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:31,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2018-10-27 06:08:31,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:31,245 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 219 transitions. [2018-10-27 06:08:31,247 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2018-10-27 06:08:31,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 139 states and 201 transitions. [2018-10-27 06:08:31,250 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-10-27 06:08:31,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 58 [2018-10-27 06:08:31,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 201 transitions. [2018-10-27 06:08:31,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:31,251 INFO L705 BuchiCegarLoop]: Abstraction has 139 states and 201 transitions. [2018-10-27 06:08:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 201 transitions. [2018-10-27 06:08:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2018-10-27 06:08:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-27 06:08:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2018-10-27 06:08:31,264 INFO L728 BuchiCegarLoop]: Abstraction has 120 states and 170 transitions. [2018-10-27 06:08:31,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 06:08:31,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-10-27 06:08:31,264 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand 8 states. [2018-10-27 06:08:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:31,379 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2018-10-27 06:08:31,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 06:08:31,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98 states and 116 transitions. [2018-10-27 06:08:31,382 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-10-27 06:08:31,383 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98 states to 63 states and 75 transitions. [2018-10-27 06:08:31,383 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-10-27 06:08:31,383 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-10-27 06:08:31,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 75 transitions. [2018-10-27 06:08:31,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:08:31,383 INFO L705 BuchiCegarLoop]: Abstraction has 63 states and 75 transitions. [2018-10-27 06:08:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 75 transitions. [2018-10-27 06:08:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-10-27 06:08:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-27 06:08:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-10-27 06:08:31,386 INFO L728 BuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-10-27 06:08:31,387 INFO L608 BuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-10-27 06:08:31,387 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-10-27 06:08:31,387 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 65 transitions. [2018-10-27 06:08:31,387 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-10-27 06:08:31,387 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:08:31,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:08:31,388 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:08:31,388 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:08:31,389 INFO L793 eck$LassoCheckResult]: Stem: 2669#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2666#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2641#L25 call main_#t~ret6 := rec2(main_~x~0);< 2640#rec2ENTRY ~j := #in~j; 2642#L18 assume !(~j <= 0); 2673#L20 call #t~ret3 := rec1(~j);< 2689#rec1ENTRY ~i := #in~i; 2687#L12 assume !(~i <= 0); 2656#L14 call #t~ret0 := rec1(~i - 2);< 2685#rec1ENTRY ~i := #in~i; 2688#L12 assume ~i <= 0;#res := 0; 2686#rec1FINAL assume true; 2667#rec1EXIT >#28#return; 2668#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2660#rec1ENTRY ~i := #in~i; 2682#L12 assume ~i <= 0;#res := 0; 2681#rec1FINAL assume true; 2679#rec1EXIT >#30#return; 2677#L14-2 call #t~ret2 := rec1(#t~ret1);< 2665#rec1ENTRY ~i := #in~i; 2680#L12 assume ~i <= 0;#res := 0; 2678#rec1FINAL assume true; 2676#rec1EXIT >#32#return; 2675#L14-3 #res := #t~ret2 + 1;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 2674#rec1FINAL assume true; 2672#rec1EXIT >#34#return; 2644#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2643#rec2ENTRY ~j := #in~j; 2645#L18 assume !(~j <= 0); 2648#L20 call #t~ret3 := rec1(~j);< 2647#rec1ENTRY [2018-10-27 06:08:31,389 INFO L795 eck$LassoCheckResult]: Loop: 2647#rec1ENTRY ~i := #in~i; 2649#L12 assume !(~i <= 0); 2650#L14 call #t~ret0 := rec1(~i - 2);< 2647#rec1ENTRY [2018-10-27 06:08:31,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1256061253, now seen corresponding path program 2 times [2018-10-27 06:08:31,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:31,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:31,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:31,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:31,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 06:08:31,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:08:31,594 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:08:31,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:08:31,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 06:08:31,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:08:31,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 06:08:31,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:08:31,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-27 06:08:31,646 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:08:31,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 4 times [2018-10-27 06:08:31,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:08:31,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:08:31,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:31,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:08:31,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:08:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:08:31,691 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:31,691 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:31,691 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:31,691 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:31,691 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:08:31,692 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:31,692 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:31,692 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:31,692 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-10-27 06:08:31,692 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:31,692 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:31,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,814 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:31,814 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:31,817 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:31,817 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:31,821 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:31,822 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/bin-2019/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:31,843 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:31,843 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:31,846 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:31,846 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:31,867 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:31,867 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:31,870 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:31,870 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:31,895 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:31,896 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:31,898 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:08:31,898 INFO L446 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_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:31,918 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:08:31,918 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a283ac24-1390-40c4-b5e9-229ffc1a63f1/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 [2018-10-27 06:08:31,940 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:08:31,940 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:08:31,961 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:08:31,962 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:08:31,962 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:08:31,962 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:08:31,962 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:08:31,962 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:08:31,962 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:08:31,962 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:08:31,963 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:08:31,963 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-10-27 06:08:31,963 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:08:31,963 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:08:31,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:31,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:32,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:32,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:32,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:08:32,060 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:08:32,060 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:08:32,060 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 [2018-10-27 06:08:32,061 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:32,061 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:32,061 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:32,061 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:32,061 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:32,062 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:32,062 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:32,062 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:32,063 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 [2018-10-27 06:08:32,063 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:32,063 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:32,063 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:32,063 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:32,064 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:32,064 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:32,064 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:32,065 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:32,065 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 [2018-10-27 06:08:32,065 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:32,066 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:32,066 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:32,066 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:32,066 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:32,066 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:32,066 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:32,067 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:32,067 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 [2018-10-27 06:08:32,068 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:32,068 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:32,068 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:32,068 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:32,068 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:32,069 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:32,069 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:32,069 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:08:32,070 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 [2018-10-27 06:08:32,070 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:08:32,070 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:08:32,070 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:08:32,070 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:08:32,071 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:08:32,071 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:08:32,071 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:08:32,074 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:08:32,075 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-10-27 06:08:32,075 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:08:32,075 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:08:32,075 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:08:32,076 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:08:32,076 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-10-27 06:08:32,076 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:08:32,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:32,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:32,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:32,217 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 [2018-10-27 06:08:32,217 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-10-27 06:08:32,268 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 64 states and 76 transitions. Complement of second has 13 states. [2018-10-27 06:08:32,268 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 [2018-10-27 06:08:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2018-10-27 06:08:32,269 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2018-10-27 06:08:32,269 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:32,270 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:08:32,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:32,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:32,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:32,400 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 [2018-10-27 06:08:32,400 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-10-27 06:08:32,448 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 64 states and 76 transitions. Complement of second has 13 states. [2018-10-27 06:08:32,449 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 [2018-10-27 06:08:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2018-10-27 06:08:32,450 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2018-10-27 06:08:32,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:32,450 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:08:32,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:08:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:32,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:08:32,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:08:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:08:32,528 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 [2018-10-27 06:08:32,528 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-10-27 06:08:32,613 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 78 states and 90 transitions. Complement of second has 13 states. [2018-10-27 06:08:32,614 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 [2018-10-27 06:08:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:08:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2018-10-27 06:08:32,615 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2018-10-27 06:08:32,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:32,615 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2018-10-27 06:08:32,616 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:32,616 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2018-10-27 06:08:32,616 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:08:32,616 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 90 transitions. [2018-10-27 06:08:32,617 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:08:32,617 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 0 states and 0 transitions. [2018-10-27 06:08:32,617 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:08:32,618 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:08:32,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:08:32,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:08:32,618 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:08:32,618 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:08:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 06:08:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-10-27 06:08:32,618 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2018-10-27 06:08:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:08:32,619 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-10-27 06:08:32,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 06:08:32,619 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-10-27 06:08:32,619 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:08:32,619 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 06:08:32,619 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:08:32,619 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:08:32,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:08:32,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:08:32,619 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:08:32,620 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:08:32,620 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:08:32,620 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-10-27 06:08:32,620 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-10-27 06:08:32,620 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:08:32,620 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-10-27 06:08:32,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.10 06:08:32 BoogieIcfgContainer [2018-10-27 06:08:32,635 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-10-27 06:08:32,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 06:08:32,635 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 06:08:32,635 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 06:08:32,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:08:24" (3/4) ... [2018-10-27 06:08:32,639 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 06:08:32,639 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 06:08:32,640 INFO L168 Benchmark]: Toolchain (without parser) took 9229.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 188.7 MB). Free memory was 959.3 MB in the beginning and 981.8 MB in the end (delta: -22.6 MB). Peak memory consumption was 166.2 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:32,641 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:08:32,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.86 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:32,642 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.51 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:08:32,642 INFO L168 Benchmark]: Boogie Preprocessor took 17.02 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:32,642 INFO L168 Benchmark]: RCFGBuilder took 351.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:32,643 INFO L168 Benchmark]: BuchiAutomizer took 8621.91 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 35.1 MB). Free memory was 1.1 GB in the beginning and 981.8 MB in the end (delta: 159.4 MB). Peak memory consumption was 194.5 MB. Max. memory is 11.5 GB. [2018-10-27 06:08:32,644 INFO L168 Benchmark]: Witness Printer took 4.17 ms. Allocated memory is still 1.2 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:08:32,646 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 203.86 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 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 27.51 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.02 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 351.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 8621.91 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 35.1 MB). Free memory was 1.1 GB in the beginning and 981.8 MB in the end (delta: 159.4 MB). Peak memory consumption was 194.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.17 ms. Allocated memory is still 1.2 GB. Free memory is still 981.8 MB. 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 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 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 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 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.5s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 4.2s. Construction of modules took 0.8s. Büchi inclusion checks took 3.2s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 112 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 201 SDtfs, 193 SDslu, 335 SDs, 0 SdLazy, 312 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...