./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb528549fa76ae8087cf7043645dfa20323a0116 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 05:29:23,884 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 05:29:23,885 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 05:29:23,893 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 05:29:23,893 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 05:29:23,894 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 05:29:23,895 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 05:29:23,896 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 05:29:23,897 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 05:29:23,898 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 05:29:23,899 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 05:29:23,899 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 05:29:23,899 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 05:29:23,900 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 05:29:23,901 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 05:29:23,901 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 05:29:23,902 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 05:29:23,904 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 05:29:23,905 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 05:29:23,906 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 05:29:23,907 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 05:29:23,908 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 05:29:23,910 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 05:29:23,910 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 05:29:23,910 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 05:29:23,911 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 05:29:23,912 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 05:29:23,912 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 05:29:23,913 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 05:29:23,913 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 05:29:23,914 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 05:29:23,915 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 05:29:23,915 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 05:29:23,915 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 05:29:23,916 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 05:29:23,916 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 05:29:23,917 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-23 05:29:23,927 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 05:29:23,928 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 05:29:23,928 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 05:29:23,929 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 05:29:23,929 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 05:29:23,929 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 05:29:23,929 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 05:29:23,929 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 05:29:23,929 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 05:29:23,929 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 05:29:23,930 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 05:29:23,930 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 05:29:23,930 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 05:29:23,931 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 05:29:23,932 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 05:29:23,932 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 05:29:23,932 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 05:29:23,932 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 05:29:23,932 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 05:29:23,932 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 05:29:23,932 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 05:29:23,933 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 05:29:23,933 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_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2018-11-23 05:29:23,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 05:29:23,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 05:29:23,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 05:29:23,968 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 05:29:23,968 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 05:29:23,969 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 05:29:24,006 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/data/979f14aca/bf3dc527ff604adcbc52daaf9daa70f2/FLAG0b83a4bb1 [2018-11-23 05:29:24,345 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 05:29:24,345 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 05:29:24,350 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/data/979f14aca/bf3dc527ff604adcbc52daaf9daa70f2/FLAG0b83a4bb1 [2018-11-23 05:29:24,769 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/data/979f14aca/bf3dc527ff604adcbc52daaf9daa70f2 [2018-11-23 05:29:24,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 05:29:24,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 05:29:24,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 05:29:24,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 05:29:24,776 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 05:29:24,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725d32ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24, skipping insertion in model container [2018-11-23 05:29:24,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 05:29:24,800 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 05:29:24,905 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 05:29:24,907 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 05:29:24,916 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 05:29:24,924 INFO L195 MainTranslator]: Completed translation [2018-11-23 05:29:24,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24 WrapperNode [2018-11-23 05:29:24,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 05:29:24,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 05:29:24,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 05:29:24,925 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 05:29:24,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 05:29:24,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 05:29:24,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 05:29:24,944 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 05:29:24,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... [2018-11-23 05:29:24,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 05:29:24,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 05:29:24,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 05:29:24,954 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 05:29:24,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-23 05:29:25,044 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-23 05:29:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-23 05:29:25,044 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-23 05:29:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 05:29:25,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 05:29:25,143 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 05:29:25,143 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 05:29:25,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:29:25 BoogieIcfgContainer [2018-11-23 05:29:25,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 05:29:25,144 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 05:29:25,144 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 05:29:25,146 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 05:29:25,147 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 05:29:25,147 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 05:29:24" (1/3) ... [2018-11-23 05:29:25,148 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70dcc447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 05:29:25, skipping insertion in model container [2018-11-23 05:29:25,148 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 05:29:25,148 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:29:24" (2/3) ... [2018-11-23 05:29:25,148 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70dcc447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 05:29:25, skipping insertion in model container [2018-11-23 05:29:25,149 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 05:29:25,149 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:29:25" (3/3) ... [2018-11-23 05:29:25,150 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 05:29:25,200 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 05:29:25,200 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 05:29:25,201 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 05:29:25,201 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 05:29:25,201 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 05:29:25,201 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 05:29:25,201 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 05:29:25,201 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 05:29:25,201 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 05:29:25,216 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-23 05:29:25,240 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:25,240 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:25,240 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:25,247 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 05:29:25,248 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:25,248 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 05:29:25,248 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-23 05:29:25,250 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:25,250 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:25,250 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:25,251 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 05:29:25,251 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:25,259 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-23 05:29:25,259 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2018-11-23 05:29:25,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-11-23 05:29:25,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:25,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:25,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:25,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:25,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:25,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2018-11-23 05:29:25,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:25,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:25,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:25,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:25,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:25,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2018-11-23 05:29:25,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:25,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:25,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:25,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:25,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:25,481 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:25,482 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:25,482 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:25,482 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:25,482 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:25,482 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:25,482 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:25,482 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:25,483 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-23 05:29:25,483 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:25,483 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:25,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,575 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:25,576 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:25,579 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:25,579 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:25,585 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:25,585 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:25,611 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:25,611 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:25,613 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:25,613 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:25,628 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:25,628 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:25,630 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:25,630 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:25,645 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:25,645 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:25,647 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:25,647 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:25,662 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:25,662 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:25,679 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:25,680 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:25,685 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:25,699 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:25,700 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:25,700 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:25,700 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:25,700 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:25,700 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:25,700 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:25,700 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:25,700 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-23 05:29:25,700 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:25,700 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:25,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:25,741 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:25,744 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:25,745 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 [2018-11-23 05:29:25,746 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:25,747 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:25,747 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:25,747 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:25,747 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:25,748 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:25,749 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:25,752 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:25,752 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 [2018-11-23 05:29:25,753 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:25,753 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:25,753 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:25,753 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:25,753 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:25,754 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:25,754 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:25,755 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:25,756 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 [2018-11-23 05:29:25,756 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:25,756 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:25,756 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:25,756 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:25,756 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:25,757 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:25,757 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:25,758 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:25,759 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 [2018-11-23 05:29:25,759 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:25,759 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:25,759 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:25,759 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:25,760 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:25,760 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:25,760 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:25,765 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:25,769 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 05:29:25,769 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 05:29:25,770 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:25,771 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:25,771 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:25,771 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-23 05:29:25,772 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:25,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:25,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:25,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:25,901 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2018-11-23 05:29:25,902 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2018-11-23 05:29:26,299 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2018-11-23 05:29:26,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2018-11-23 05:29:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 05:29:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2018-11-23 05:29:26,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 05:29:26,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:26,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2018-11-23 05:29:26,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:26,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2018-11-23 05:29:26,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:26,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2018-11-23 05:29:26,313 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:26,321 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2018-11-23 05:29:26,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2018-11-23 05:29:26,322 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2018-11-23 05:29:26,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2018-11-23 05:29:26,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:26,323 INFO L705 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2018-11-23 05:29:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2018-11-23 05:29:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2018-11-23 05:29:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-23 05:29:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2018-11-23 05:29:26,348 INFO L728 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2018-11-23 05:29:26,348 INFO L608 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2018-11-23 05:29:26,348 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 05:29:26,349 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2018-11-23 05:29:26,350 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:26,350 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:26,350 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:26,351 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:26,351 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 05:29:26,351 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2018-11-23 05:29:26,351 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2018-11-23 05:29:26,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2018-11-23 05:29:26,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:26,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:26,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:26,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,358 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-11-23 05:29:26,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:26,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:26,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:26,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2018-11-23 05:29:26,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:26,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:26,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,413 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:26,413 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:26,413 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:26,414 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:26,414 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:26,414 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:26,414 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:26,414 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:26,414 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-23 05:29:26,414 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:26,414 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:26,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,457 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:26,458 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,462 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,462 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,464 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:26,465 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,479 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,479 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,481 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:26,481 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,495 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,495 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,497 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:26,497 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,512 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,512 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,514 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:26,514 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,529 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,529 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,530 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:26,530 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,545 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,545 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,562 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:26,562 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,578 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:26,579 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:26,580 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:26,580 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:26,580 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:26,580 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:26,580 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:26,580 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:26,580 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:26,580 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-23 05:29:26,581 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:26,581 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:26,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,607 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:26,607 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:26,607 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 [2018-11-23 05:29:26,608 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,608 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,608 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,608 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,609 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,609 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,609 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,611 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:26,611 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 [2018-11-23 05:29:26,612 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,612 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,612 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,612 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,612 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,613 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,614 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,614 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:26,615 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 [2018-11-23 05:29:26,615 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,615 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,615 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,616 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,616 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,616 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,616 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,617 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:26,617 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 [2018-11-23 05:29:26,618 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,618 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,618 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,618 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,618 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,619 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,619 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,620 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:26,620 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 [2018-11-23 05:29:26,620 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,620 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,621 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,621 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,621 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,621 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,621 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,626 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:26,629 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 05:29:26,629 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 05:29:26,629 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:26,630 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:26,630 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:26,630 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 05:29:26,630 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:26,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:26,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:26,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:26,674 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 [2018-11-23 05:29:26,674 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2018-11-23 05:29:26,704 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2018-11-23 05:29:26,705 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 [2018-11-23 05:29:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 05:29:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2018-11-23 05:29:26,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2018-11-23 05:29:26,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:26,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2018-11-23 05:29:26,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:26,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2018-11-23 05:29:26,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:26,706 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2018-11-23 05:29:26,709 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:26,711 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2018-11-23 05:29:26,711 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2018-11-23 05:29:26,711 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2018-11-23 05:29:26,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2018-11-23 05:29:26,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:26,712 INFO L705 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2018-11-23 05:29:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2018-11-23 05:29:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-11-23 05:29:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-23 05:29:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2018-11-23 05:29:26,718 INFO L728 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2018-11-23 05:29:26,718 INFO L608 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2018-11-23 05:29:26,718 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 05:29:26,718 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2018-11-23 05:29:26,719 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:26,719 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:26,719 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:26,719 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:26,720 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 05:29:26,720 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2018-11-23 05:29:26,720 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2018-11-23 05:29:26,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2018-11-23 05:29:26,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:26,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:26,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:26,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-11-23 05:29:26,728 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:26,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:26,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:26,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:26,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,732 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2018-11-23 05:29:26,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:26,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:26,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:26,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 05:29:26,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 05:29:26,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 05:29:26,792 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:26,792 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:26,792 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:26,792 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:26,792 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:26,793 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:26,793 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:26,793 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:26,793 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-23 05:29:26,793 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:26,793 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:26,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,795 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,832 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:26,833 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,835 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,835 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,837 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:26,837 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,852 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:26,852 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:26,869 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:26,869 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:26,884 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:26,885 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:26,885 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:26,885 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:26,886 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:26,886 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:26,886 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:26,886 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:26,886 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:26,886 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-23 05:29:26,886 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:26,886 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:26,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:26,912 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:26,912 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:26,912 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 [2018-11-23 05:29:26,913 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,913 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,913 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,913 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,913 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,913 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,913 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,914 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:26,914 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 [2018-11-23 05:29:26,914 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:26,914 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:26,914 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:26,914 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:26,914 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:26,915 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:26,915 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:26,917 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:26,919 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 05:29:26,919 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 05:29:26,919 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:26,919 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:26,919 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:26,919 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 05:29:26,920 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:26,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:26,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:26,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:26,974 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 [2018-11-23 05:29:26,974 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2018-11-23 05:29:27,025 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2018-11-23 05:29:27,025 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 [2018-11-23 05:29:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 05:29:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2018-11-23 05:29:27,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-23 05:29:27,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:27,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2018-11-23 05:29:27,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:27,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2018-11-23 05:29:27,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:27,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2018-11-23 05:29:27,029 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:27,031 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2018-11-23 05:29:27,031 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2018-11-23 05:29:27,031 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2018-11-23 05:29:27,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2018-11-23 05:29:27,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:27,032 INFO L705 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2018-11-23 05:29:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2018-11-23 05:29:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2018-11-23 05:29:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-23 05:29:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2018-11-23 05:29:27,040 INFO L728 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2018-11-23 05:29:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 05:29:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 05:29:27,043 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2018-11-23 05:29:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:29:27,070 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2018-11-23 05:29:27,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 05:29:27,071 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2018-11-23 05:29:27,073 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-23 05:29:27,075 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2018-11-23 05:29:27,075 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-11-23 05:29:27,076 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2018-11-23 05:29:27,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2018-11-23 05:29:27,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:27,076 INFO L705 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2018-11-23 05:29:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2018-11-23 05:29:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2018-11-23 05:29:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-11-23 05:29:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2018-11-23 05:29:27,082 INFO L728 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2018-11-23 05:29:27,082 INFO L608 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2018-11-23 05:29:27,082 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 05:29:27,082 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2018-11-23 05:29:27,084 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 05:29:27,084 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:27,084 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:27,084 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:27,084 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:27,085 INFO L794 eck$LassoCheckResult]: Stem: 1162#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1163#L25 call main_#t~ret6 := rec2(main_~x~0);< 1170#rec2ENTRY ~j := #in~j; 1181#L18 assume !(~j <= 0); 1140#L20 call #t~ret3 := rec1(~j - 1);< 1180#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1176#rec1ENTRY ~i := #in~i; 1175#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1174#rec1ENTRY ~i := #in~i; 1178#L12 assume ~i <= 0;#res := 0; 1220#rec1FINAL assume true; 1160#rec1EXIT >#27#return; 1129#L14-1 [2018-11-23 05:29:27,085 INFO L796 eck$LassoCheckResult]: Loop: 1129#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1128#rec1ENTRY ~i := #in~i; 1131#L12 assume ~i <= 0;#res := 0; 1136#rec1FINAL assume true; 1137#rec1EXIT >#29#return; 1148#L14-2 call #t~ret2 := rec1(#t~ret1);< 1157#rec1ENTRY ~i := #in~i; 1200#L12 assume !(~i <= 0); 1149#L14 call #t~ret0 := rec1(~i - 2);< 1157#rec1ENTRY ~i := #in~i; 1200#L12 assume ~i <= 0;#res := 0; 1201#rec1FINAL assume true; 1209#rec1EXIT >#27#return; 1129#L14-1 [2018-11-23 05:29:27,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2018-11-23 05:29:27,085 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:27,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:27,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2018-11-23 05:29:27,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:27,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 05:29:27,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:29:27,138 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:29:27,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:27,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:27,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 05:29:27,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-23 05:29:27,168 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 05:29:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 05:29:27,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 05:29:27,168 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2018-11-23 05:29:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:29:27,208 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2018-11-23 05:29:27,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 05:29:27,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2018-11-23 05:29:27,210 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:27,212 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2018-11-23 05:29:27,212 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2018-11-23 05:29:27,213 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2018-11-23 05:29:27,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2018-11-23 05:29:27,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:27,213 INFO L705 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2018-11-23 05:29:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2018-11-23 05:29:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2018-11-23 05:29:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-23 05:29:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2018-11-23 05:29:27,218 INFO L728 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2018-11-23 05:29:27,218 INFO L608 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2018-11-23 05:29:27,218 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 05:29:27,218 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2018-11-23 05:29:27,219 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 05:29:27,219 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:27,219 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:27,220 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:27,220 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:27,220 INFO L794 eck$LassoCheckResult]: Stem: 1425#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1426#L25 call main_#t~ret6 := rec2(main_~x~0);< 1442#rec2ENTRY ~j := #in~j; 1453#L18 assume !(~j <= 0); 1411#L20 call #t~ret3 := rec1(~j - 1);< 1452#rec1ENTRY ~i := #in~i; 1451#L12 assume !(~i <= 0); 1406#L14 call #t~ret0 := rec1(~i - 2);< 1450#rec1ENTRY ~i := #in~i; 1419#L12 assume ~i <= 0;#res := 0; 1405#rec1FINAL assume true; 1407#rec1EXIT >#27#return; 1399#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1397#rec1ENTRY ~i := #in~i; 1400#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1488#rec1EXIT >#29#return; 1421#L14-2 call #t~ret2 := rec1(#t~ret1);< 1422#rec1ENTRY ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1485#rec1FINAL assume true; 1482#rec1EXIT >#31#return; 1415#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret0;havoc #t~ret2; 1416#rec1FINAL assume true; 1446#rec1EXIT >#33#return; 1392#L20-1 [2018-11-23 05:29:27,221 INFO L796 eck$LassoCheckResult]: Loop: 1392#L20-1 call #t~ret4 := rec2(#t~ret3);< 1391#rec2ENTRY ~j := #in~j; 1393#L18 assume !(~j <= 0); 1429#L20 call #t~ret3 := rec1(~j - 1);< 1434#rec1ENTRY ~i := #in~i; 1492#L12 assume !(~i <= 0); 1427#L14 call #t~ret0 := rec1(~i - 2);< 1434#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1487#rec1FINAL assume true; 1484#rec1EXIT >#27#return; 1398#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1397#rec1ENTRY ~i := #in~i; 1400#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1488#rec1EXIT >#29#return; 1483#L14-2 call #t~ret2 := rec1(#t~ret1);< 1422#rec1ENTRY ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1485#rec1FINAL assume true; 1482#rec1EXIT >#31#return; 1445#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret0;havoc #t~ret2; 1457#rec1FINAL assume true; 1443#rec1EXIT >#33#return; 1392#L20-1 [2018-11-23 05:29:27,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2018-11-23 05:29:27,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:27,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:27,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:27,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:27,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:27,231 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2018-11-23 05:29:27,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:27,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:27,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:27,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:27,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:27,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2018-11-23 05:29:27,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:27,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:27,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:27,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-23 05:29:27,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:29:27,323 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:27,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:27,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-23 05:29:27,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:29:27,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 05:29:27,519 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:27,520 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:27,520 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:27,520 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:27,520 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:27,520 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:27,520 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:27,520 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:27,520 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-23 05:29:27,520 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:27,520 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:27,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:27,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:27,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:27,545 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:27,545 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:27,547 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:27,547 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:27,565 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:27,565 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:30,399 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:30,401 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:30,401 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:30,401 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:30,401 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:30,401 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:30,401 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:30,401 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:30,402 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:30,402 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-23 05:29:30,402 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:30,402 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:30,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:30,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:30,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:30,446 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:30,446 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:30,446 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 [2018-11-23 05:29:30,447 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:30,447 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:30,447 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:30,447 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:30,447 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:30,447 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:30,448 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:30,448 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:30,449 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 [2018-11-23 05:29:30,449 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:30,449 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:30,449 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:30,449 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:30,450 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:30,450 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:30,450 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:30,451 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:30,451 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 [2018-11-23 05:29:30,451 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:30,451 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:30,452 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:30,452 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:30,452 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:30,452 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:30,453 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:30,457 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:30,460 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 05:29:30,460 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 05:29:30,460 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:30,460 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:30,461 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:30,461 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2018-11-23 05:29:30,461 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:30,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:30,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:30,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 05:29:30,642 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-23 05:29:30,642 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2018-11-23 05:29:30,953 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2018-11-23 05:29:30,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-23 05:29:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-23 05:29:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2018-11-23 05:29:30,954 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2018-11-23 05:29:30,955 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:30,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2018-11-23 05:29:30,955 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:30,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2018-11-23 05:29:30,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:30,956 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2018-11-23 05:29:30,964 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-23 05:29:30,973 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2018-11-23 05:29:30,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2018-11-23 05:29:30,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2018-11-23 05:29:30,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2018-11-23 05:29:30,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:30,974 INFO L705 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2018-11-23 05:29:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2018-11-23 05:29:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2018-11-23 05:29:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-23 05:29:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2018-11-23 05:29:30,998 INFO L728 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2018-11-23 05:29:30,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 05:29:30,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-23 05:29:30,999 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 10 states. [2018-11-23 05:29:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:29:31,156 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2018-11-23 05:29:31,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 05:29:31,156 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2018-11-23 05:29:31,160 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-23 05:29:31,166 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2018-11-23 05:29:31,166 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2018-11-23 05:29:31,167 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2018-11-23 05:29:31,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2018-11-23 05:29:31,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:31,168 INFO L705 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2018-11-23 05:29:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2018-11-23 05:29:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2018-11-23 05:29:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-11-23 05:29:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2018-11-23 05:29:31,182 INFO L728 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2018-11-23 05:29:31,182 INFO L608 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2018-11-23 05:29:31,182 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 05:29:31,182 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2018-11-23 05:29:31,184 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-23 05:29:31,185 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:31,185 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:31,186 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:31,186 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 05:29:31,186 INFO L794 eck$LassoCheckResult]: Stem: 3358#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3359#L25 call main_#t~ret6 := rec2(main_~x~0);< 3375#rec2ENTRY ~j := #in~j; 3398#L18 assume !(~j <= 0); 3336#L20 call #t~ret3 := rec1(~j - 1);< 3396#rec1ENTRY ~i := #in~i; 3411#L12 assume !(~i <= 0); 3407#L14 call #t~ret0 := rec1(~i - 2);< 3410#rec1ENTRY ~i := #in~i; 3415#L12 assume ~i <= 0;#res := 0; 3515#rec1FINAL assume true; 3512#rec1EXIT >#27#return; 3335#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3337#rec1ENTRY ~i := #in~i; 3514#L12 assume ~i <= 0;#res := 0; 3513#rec1FINAL assume true; 3509#rec1EXIT >#29#return; 3317#L14-2 call #t~ret2 := rec1(#t~ret1);< 3316#rec1ENTRY ~i := #in~i; 3319#L12 assume ~i <= 0;#res := 0; 3508#rec1FINAL assume true; 3507#rec1EXIT >#31#return; 3340#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret0;havoc #t~ret2; 3341#rec1FINAL assume true; 3376#rec1EXIT >#33#return; 3377#L20-1 call #t~ret4 := rec2(#t~ret3);< 3496#rec2ENTRY ~j := #in~j; 3494#L18 assume !(~j <= 0); 3361#L20 call #t~ret3 := rec1(~j - 1);< 3491#rec1ENTRY ~i := #in~i; 3490#L12 assume !(~i <= 0); 3360#L14 call #t~ret0 := rec1(~i - 2);< 3363#rec1ENTRY [2018-11-23 05:29:31,186 INFO L796 eck$LassoCheckResult]: Loop: 3363#rec1ENTRY ~i := #in~i; 3464#L12 assume !(~i <= 0); 3445#L14 call #t~ret0 := rec1(~i - 2);< 3363#rec1ENTRY [2018-11-23 05:29:31,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2018-11-23 05:29:31,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:31,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:31,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:31,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:31,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-23 05:29:31,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:29:31,239 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:29:31,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 05:29:31,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 05:29:31,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:29:31,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-23 05:29:31,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:29:31,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-23 05:29:31,292 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 05:29:31,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2018-11-23 05:29:31,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:31,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:31,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:31,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:31,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:31,318 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:31,318 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:31,318 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:31,318 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:31,318 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:31,318 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:31,318 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:31,318 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:31,318 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-23 05:29:31,318 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:31,319 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:31,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,346 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:31,346 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:31,349 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:31,349 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:31,351 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:31,351 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:31,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:31,370 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:31,391 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:31,391 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:31,411 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:31,413 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:31,413 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:31,413 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:31,413 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:31,413 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:31,413 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:31,413 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:31,413 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:31,413 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-23 05:29:31,413 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:31,414 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:31,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:31,444 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:31,444 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:31,444 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 [2018-11-23 05:29:31,445 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:31,445 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:31,445 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:31,445 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:31,445 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:31,446 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:31,446 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:31,447 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:31,447 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 [2018-11-23 05:29:31,447 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:31,447 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:31,448 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:31,448 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:31,448 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:31,448 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:31,448 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:31,450 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:31,451 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 05:29:31,452 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 05:29:31,452 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:31,452 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:31,452 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:31,452 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 05:29:31,452 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:31,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:31,554 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 [2018-11-23 05:29:31,554 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-23 05:29:31,608 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2018-11-23 05:29:31,609 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 [2018-11-23 05:29:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 05:29:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-11-23 05:29:31,610 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-23 05:29:31,610 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:31,610 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 05:29:31,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:31,694 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 [2018-11-23 05:29:31,694 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-23 05:29:31,748 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2018-11-23 05:29:31,749 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 [2018-11-23 05:29:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 05:29:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-11-23 05:29:31,750 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-23 05:29:31,750 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:31,750 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 05:29:31,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:31,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:31,856 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 [2018-11-23 05:29:31,856 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-23 05:29:31,953 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2018-11-23 05:29:31,954 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 [2018-11-23 05:29:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 05:29:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-11-23 05:29:31,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-23 05:29:31,955 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:31,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2018-11-23 05:29:31,955 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:31,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2018-11-23 05:29:31,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:31,956 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2018-11-23 05:29:31,965 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2018-11-23 05:29:31,970 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2018-11-23 05:29:31,970 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2018-11-23 05:29:31,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2018-11-23 05:29:31,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2018-11-23 05:29:31,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:31,971 INFO L705 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2018-11-23 05:29:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2018-11-23 05:29:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2018-11-23 05:29:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-23 05:29:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2018-11-23 05:29:31,983 INFO L728 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2018-11-23 05:29:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 05:29:31,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-23 05:29:31,984 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2018-11-23 05:29:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:29:32,083 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2018-11-23 05:29:32,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 05:29:32,084 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2018-11-23 05:29:32,088 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-23 05:29:32,090 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2018-11-23 05:29:32,090 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2018-11-23 05:29:32,090 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2018-11-23 05:29:32,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2018-11-23 05:29:32,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:32,091 INFO L705 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2018-11-23 05:29:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2018-11-23 05:29:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2018-11-23 05:29:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-23 05:29:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2018-11-23 05:29:32,096 INFO L728 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2018-11-23 05:29:32,096 INFO L608 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2018-11-23 05:29:32,096 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-23 05:29:32,096 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2018-11-23 05:29:32,097 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-23 05:29:32,097 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:32,097 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:32,097 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:32,097 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 05:29:32,098 INFO L794 eck$LassoCheckResult]: Stem: 6075#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6076#L25 call main_#t~ret6 := rec2(main_~x~0);< 6080#rec2ENTRY ~j := #in~j; 6108#L18 assume !(~j <= 0); 6105#L20 call #t~ret3 := rec1(~j - 1);< 6107#rec1ENTRY ~i := #in~i; 6106#L12 assume !(~i <= 0); 6060#L14 call #t~ret0 := rec1(~i - 2);< 6082#rec1ENTRY ~i := #in~i; 6070#L12 assume !(~i <= 0); 6063#L14 [2018-11-23 05:29:32,098 INFO L796 eck$LassoCheckResult]: Loop: 6063#L14 call #t~ret0 := rec1(~i - 2);< 6113#rec1ENTRY ~i := #in~i; 6070#L12 assume !(~i <= 0); 6063#L14 [2018-11-23 05:29:32,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:32,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2018-11-23 05:29:32,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:32,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:32,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:32,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:32,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:32,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2018-11-23 05:29:32,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:32,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:32,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:32,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:32,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:32,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2018-11-23 05:29:32,110 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:32,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:32,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:32,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:32,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:32,145 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:32,145 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:32,145 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:32,145 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:32,145 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:32,145 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:32,145 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:32,145 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:32,145 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-23 05:29:32,145 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:32,145 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:32,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:32,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:32,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:32,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:32,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:32,175 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:32,175 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:32,177 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:32,177 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:32,219 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:32,219 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:35,533 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:35,535 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:35,535 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:35,535 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:35,535 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:35,535 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:35,535 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:35,535 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:35,535 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:35,535 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-23 05:29:35,535 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:35,535 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:35,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,564 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:35,564 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:35,565 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 [2018-11-23 05:29:35,565 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:35,565 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:35,565 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:35,565 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:35,565 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:35,566 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:35,566 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:35,567 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:35,569 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 05:29:35,569 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 05:29:35,569 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:35,569 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:35,569 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:35,569 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2018-11-23 05:29:35,569 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:35,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:35,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:35,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:29:35,618 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 [2018-11-23 05:29:35,618 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2018-11-23 05:29:35,641 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2018-11-23 05:29:35,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 05:29:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 05:29:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-23 05:29:35,646 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2018-11-23 05:29:35,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:35,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-23 05:29:35,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:35,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2018-11-23 05:29:35,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:35,647 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2018-11-23 05:29:35,648 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-23 05:29:35,649 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2018-11-23 05:29:35,649 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2018-11-23 05:29:35,650 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2018-11-23 05:29:35,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2018-11-23 05:29:35,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:35,650 INFO L705 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2018-11-23 05:29:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2018-11-23 05:29:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2018-11-23 05:29:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-23 05:29:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2018-11-23 05:29:35,653 INFO L728 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2018-11-23 05:29:35,653 INFO L608 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2018-11-23 05:29:35,653 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-23 05:29:35,654 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2018-11-23 05:29:35,654 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-23 05:29:35,654 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 05:29:35,654 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 05:29:35,658 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:29:35,658 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-23 05:29:35,658 INFO L794 eck$LassoCheckResult]: Stem: 6332#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6333#L25 call main_#t~ret6 := rec2(main_~x~0);< 6339#rec2ENTRY ~j := #in~j; 6338#L18 assume !(~j <= 0); 6334#L20 call #t~ret3 := rec1(~j - 1);< 6362#rec1ENTRY ~i := #in~i; 6363#L12 assume !(~i <= 0); 6318#L14 call #t~ret0 := rec1(~i - 2);< 6335#rec1ENTRY ~i := #in~i; 6366#L12 assume !(~i <= 0); 6301#L14 call #t~ret0 := rec1(~i - 2);< 6300#rec1ENTRY ~i := #in~i; 6302#L12 assume ~i <= 0;#res := 0; 6307#rec1FINAL assume true; 6308#rec1EXIT >#27#return; 6331#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6379#rec1ENTRY ~i := #in~i; 6381#L12 assume ~i <= 0;#res := 0; 6380#rec1FINAL assume true; 6378#rec1EXIT >#29#return; 6346#L14-2 call #t~ret2 := rec1(#t~ret1);< 6347#rec1ENTRY ~i := #in~i; 6361#L12 assume ~i <= 0;#res := 0; 6358#rec1FINAL assume true; 6351#rec1EXIT >#31#return; 6317#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret0;havoc #t~ret2; 6325#rec1FINAL assume true; 6350#rec1EXIT >#27#return; 6320#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6349#rec1ENTRY [2018-11-23 05:29:35,658 INFO L796 eck$LassoCheckResult]: Loop: 6349#rec1ENTRY ~i := #in~i; 6354#L12 assume !(~i <= 0); 6324#L14 call #t~ret0 := rec1(~i - 2);< 6353#rec1ENTRY ~i := #in~i; 6374#L12 assume !(~i <= 0); 6319#L14 call #t~ret0 := rec1(~i - 2);< 6336#rec1ENTRY ~i := #in~i; 6326#L12 assume ~i <= 0;#res := 0; 6327#rec1FINAL assume true; 6364#rec1EXIT >#27#return; 6331#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6379#rec1ENTRY ~i := #in~i; 6381#L12 assume ~i <= 0;#res := 0; 6380#rec1FINAL assume true; 6378#rec1EXIT >#29#return; 6346#L14-2 call #t~ret2 := rec1(#t~ret1);< 6347#rec1ENTRY ~i := #in~i; 6361#L12 assume ~i <= 0;#res := 0; 6358#rec1FINAL assume true; 6351#rec1EXIT >#31#return; 6317#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret0;havoc #t~ret2; 6325#rec1FINAL assume true; 6350#rec1EXIT >#27#return; 6321#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6349#rec1ENTRY [2018-11-23 05:29:35,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:35,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2018-11-23 05:29:35,658 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:35,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:35,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:35,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:29:35,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:35,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2018-11-23 05:29:35,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:35,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:35,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:35,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:35,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 05:29:35,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2018-11-23 05:29:35,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:29:35,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:29:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:35,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:29:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:29:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-23 05:29:35,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:29:35,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:29:35,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 05:29:35,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 05:29:35,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:29:35,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-23 05:29:35,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:29:35,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 05:29:35,905 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:35,906 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:35,906 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:35,906 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:35,906 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 05:29:35,906 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:35,906 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:35,906 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:35,906 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-11-23 05:29:35,906 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:35,906 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:35,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:35,956 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:35,956 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:35,959 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:35,959 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:35,960 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:35,961 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:35,976 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:35,976 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:35,978 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:35,978 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:36,006 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:36,007 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:36,008 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 05:29:36,009 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/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 [2018-11-23 05:29:36,035 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 05:29:36,035 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cacc2707-3d1b-40fe-b6f9-64c6128a8e78/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:36,054 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 05:29:36,054 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 05:29:36,058 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 05:29:36,072 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 05:29:36,072 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 05:29:36,072 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 05:29:36,072 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 05:29:36,072 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 05:29:36,072 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 05:29:36,072 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 05:29:36,072 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 05:29:36,072 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-11-23 05:29:36,072 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 05:29:36,072 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 05:29:36,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:36,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:36,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:36,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:36,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:36,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 05:29:36,098 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 05:29:36,098 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 05:29:36,099 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 [2018-11-23 05:29:36,099 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:36,099 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:36,099 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:36,099 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:36,099 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:36,100 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:36,100 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:36,100 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:36,101 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 [2018-11-23 05:29:36,101 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:36,101 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:36,101 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:36,101 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:36,101 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:36,102 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:36,102 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:36,102 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 05:29:36,103 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 [2018-11-23 05:29:36,103 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 05:29:36,103 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 05:29:36,103 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 05:29:36,103 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 05:29:36,103 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 05:29:36,104 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 05:29:36,104 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 05:29:36,105 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 05:29:36,107 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 05:29:36,107 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 05:29:36,107 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 05:29:36,107 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 05:29:36,107 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 05:29:36,107 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 05:29:36,108 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 05:29:36,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 05:29:36,269 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-23 05:29:36,269 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-23 05:29:36,308 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2018-11-23 05:29:36,309 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 [2018-11-23 05:29:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-23 05:29:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-23 05:29:36,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-23 05:29:36,310 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:36,310 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 05:29:36,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 05:29:36,451 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-23 05:29:36,451 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-23 05:29:36,494 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2018-11-23 05:29:36,494 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 [2018-11-23 05:29:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-23 05:29:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-23 05:29:36,495 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-23 05:29:36,495 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:36,495 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 05:29:36,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 05:29:36,637 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-23 05:29:36,637 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-23 05:29:36,839 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2018-11-23 05:29:36,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-23 05:29:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-23 05:29:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2018-11-23 05:29:36,840 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-23 05:29:36,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:36,840 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 05:29:36,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:29:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:29:36,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:29:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 05:29:36,956 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-23 05:29:36,956 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-23 05:29:37,267 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2018-11-23 05:29:37,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2018-11-23 05:29:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-23 05:29:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2018-11-23 05:29:37,269 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-23 05:29:37,269 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:37,269 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2018-11-23 05:29:37,270 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:37,270 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2018-11-23 05:29:37,271 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 05:29:37,271 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2018-11-23 05:29:37,275 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2018-11-23 05:29:37,277 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2018-11-23 05:29:37,277 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-11-23 05:29:37,278 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2018-11-23 05:29:37,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2018-11-23 05:29:37,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 05:29:37,278 INFO L705 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2018-11-23 05:29:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2018-11-23 05:29:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2018-11-23 05:29:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-11-23 05:29:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2018-11-23 05:29:37,285 INFO L728 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2018-11-23 05:29:37,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 05:29:37,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-23 05:29:37,286 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 8 states. [2018-11-23 05:29:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:29:37,322 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-11-23 05:29:37,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 05:29:37,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2018-11-23 05:29:37,323 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 05:29:37,323 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2018-11-23 05:29:37,323 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 05:29:37,323 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 05:29:37,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 05:29:37,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 05:29:37,324 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 05:29:37,324 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 05:29:37,324 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 05:29:37,324 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-23 05:29:37,324 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 05:29:37,324 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 05:29:37,324 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 05:29:37,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 05:29:37 BoogieIcfgContainer [2018-11-23 05:29:37,329 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 05:29:37,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 05:29:37,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 05:29:37,330 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 05:29:37,330 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:29:25" (3/4) ... [2018-11-23 05:29:37,332 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 05:29:37,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 05:29:37,333 INFO L168 Benchmark]: Toolchain (without parser) took 12561.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.8 MB). Free memory was 953.8 MB in the beginning and 1.0 GB in the end (delta: -91.9 MB). Peak memory consumption was 107.9 MB. Max. memory is 11.5 GB. [2018-11-23 05:29:37,334 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 05:29:37,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.64 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 05:29:37,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.26 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 05:29:37,335 INFO L168 Benchmark]: Boogie Preprocessor took 10.13 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 05:29:37,335 INFO L168 Benchmark]: RCFGBuilder took 189.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -173.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 05:29:37,336 INFO L168 Benchmark]: BuchiAutomizer took 12185.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 62.2 MB). Peak memory consumption was 132.9 MB. Max. memory is 11.5 GB. [2018-11-23 05:29:37,336 INFO L168 Benchmark]: Witness Printer took 3.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 11.5 GB. [2018-11-23 05:29:37,338 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.64 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.26 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.13 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 189.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -173.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 12185.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 62.2 MB). Peak memory consumption was 132.9 MB. Max. memory is 11.5 GB. * Witness Printer took 3.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6beaebad and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 12.1s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 8.5s. Construction of modules took 0.7s. Büchi inclusion checks took 2.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 288 SDtfs, 336 SDslu, 538 SDs, 0 SdLazy, 951 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...