./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0837a1e1d82be1b28ccf3514392f1b01c88a9160 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 00:22:30,158 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 00:22:30,159 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 00:22:30,165 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 00:22:30,166 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 00:22:30,166 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 00:22:30,167 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 00:22:30,168 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 00:22:30,168 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 00:22:30,169 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 00:22:30,169 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 00:22:30,169 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 00:22:30,170 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 00:22:30,170 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 00:22:30,171 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 00:22:30,171 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 00:22:30,172 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 00:22:30,173 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 00:22:30,173 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 00:22:30,174 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 00:22:30,175 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 00:22:30,175 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 00:22:30,176 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 00:22:30,177 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 00:22:30,177 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 00:22:30,177 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 00:22:30,178 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 00:22:30,178 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 00:22:30,178 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 00:22:30,179 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 00:22:30,179 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 00:22:30,179 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 00:22:30,179 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 00:22:30,180 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 00:22:30,180 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 00:22:30,180 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 00:22:30,181 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-12-09 00:22:30,188 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 00:22:30,189 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 00:22:30,189 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 00:22:30,189 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 00:22:30,189 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 00:22:30,190 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-09 00:22:30,190 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 00:22:30,190 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-09 00:22:30,191 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-09 00:22:30,191 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 00:22:30,191 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 00:22:30,192 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-09 00:22:30,192 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-09 00:22:30,192 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2018-12-09 00:22:30,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 00:22:30,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 00:22:30,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 00:22:30,221 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 00:22:30,222 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 00:22:30,222 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-09 00:22:30,269 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/data/ca5b29358/5c16c28e7d8548b5bbd373ed7f11448f/FLAGd2c1d0def [2018-12-09 00:22:30,707 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 00:22:30,707 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-09 00:22:30,711 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/data/ca5b29358/5c16c28e7d8548b5bbd373ed7f11448f/FLAGd2c1d0def [2018-12-09 00:22:30,719 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/data/ca5b29358/5c16c28e7d8548b5bbd373ed7f11448f [2018-12-09 00:22:30,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 00:22:30,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 00:22:30,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 00:22:30,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 00:22:30,724 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 00:22:30,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216e4883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30, skipping insertion in model container [2018-12-09 00:22:30,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 00:22:30,739 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 00:22:30,826 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:22:30,829 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 00:22:30,837 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:22:30,844 INFO L195 MainTranslator]: Completed translation [2018-12-09 00:22:30,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30 WrapperNode [2018-12-09 00:22:30,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 00:22:30,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 00:22:30,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 00:22:30,845 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 00:22:30,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 00:22:30,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 00:22:30,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 00:22:30,867 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 00:22:30,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... [2018-12-09 00:22:30,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 00:22:30,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 00:22:30,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 00:22:30,877 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 00:22:30,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:30,940 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-12-09 00:22:30,940 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-12-09 00:22:30,940 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-12-09 00:22:30,940 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-12-09 00:22:30,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 00:22:30,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 00:22:31,018 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 00:22:31,018 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-09 00:22:31,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:22:31 BoogieIcfgContainer [2018-12-09 00:22:31,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 00:22:31,019 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-09 00:22:31,019 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-09 00:22:31,021 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-09 00:22:31,022 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 00:22:31,022 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.12 12:22:30" (1/3) ... [2018-12-09 00:22:31,022 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7e959411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.12 12:22:31, skipping insertion in model container [2018-12-09 00:22:31,022 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 00:22:31,023 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:22:30" (2/3) ... [2018-12-09 00:22:31,023 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7e959411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.12 12:22:31, skipping insertion in model container [2018-12-09 00:22:31,023 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 00:22:31,023 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:22:31" (3/3) ... [2018-12-09 00:22:31,024 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-09 00:22:31,058 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 00:22:31,058 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-09 00:22:31,058 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-09 00:22:31,058 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-09 00:22:31,058 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 00:22:31,058 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 00:22:31,058 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-09 00:22:31,058 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 00:22:31,058 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-09 00:22:31,067 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-12-09 00:22:31,083 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:31,083 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:31,083 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:31,088 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-09 00:22:31,088 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:31,088 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-09 00:22:31,089 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-12-09 00:22:31,090 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:31,090 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:31,090 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:31,090 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-09 00:22:31,090 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:31,095 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-12-09 00:22:31,096 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j);< 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 - 1);< 3#rec2ENTRYtrue [2018-12-09 00:22:31,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-12-09 00:22:31,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:31,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:31,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:31,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2018-12-09 00:22:31,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:31,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:31,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:31,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:31,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:22:31,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 00:22:31,219 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-09 00:22:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 00:22:31,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 00:22:31,228 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-12-09 00:22:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:31,285 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-12-09 00:22:31,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 00:22:31,287 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2018-12-09 00:22:31,289 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:31,292 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2018-12-09 00:22:31,293 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-12-09 00:22:31,293 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2018-12-09 00:22:31,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2018-12-09 00:22:31,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 00:22:31,295 INFO L705 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-12-09 00:22:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2018-12-09 00:22:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-09 00:22:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 00:22:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-12-09 00:22:31,313 INFO L728 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-12-09 00:22:31,313 INFO L608 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-12-09 00:22:31,313 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-09 00:22:31,313 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2018-12-09 00:22:31,314 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:31,314 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:31,314 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:31,315 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-09 00:22:31,315 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:31,315 INFO L794 eck$LassoCheckResult]: Stem: 73#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; 60#L25 call main_#t~ret6 := rec2(main_~x~0);< 59#rec2ENTRY [2018-12-09 00:22:31,315 INFO L796 eck$LassoCheckResult]: Loop: 59#rec2ENTRY ~j := #in~j; 62#L18 assume !(~j <= 0); 66#L20 call #t~ret3 := rec1(~j);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume !(~i <= 0); 67#L14 call #t~ret0 := rec1(~i - 2);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume ~i <= 0;#res := 0; 69#rec1FINAL assume true; 70#rec1EXIT >#27#return; 64#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume ~i <= 0;#res := 0; 69#rec1FINAL assume true; 70#rec1EXIT >#29#return; 65#L14-2 call #t~ret2 := rec1(#t~ret1);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume ~i <= 0;#res := 0; 69#rec1FINAL assume true; 70#rec1EXIT >#31#return; 71#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret2;havoc #t~ret1; 72#rec1FINAL assume true; 74#rec1EXIT >#33#return; 61#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 59#rec2ENTRY [2018-12-09 00:22:31,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2018-12-09 00:22:31,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:31,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:31,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:31,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2018-12-09 00:22:31,319 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:31,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:31,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:31,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2018-12-09 00:22:31,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:31,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:31,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:31,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:31,548 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:31,549 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:31,549 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:31,549 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:31,549 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 00:22:31,549 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,549 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:31,549 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:31,549 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-09 00:22:31,549 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:31,550 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:31,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,572 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,603 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:31,604 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,607 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:31,607 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:31,612 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:31,612 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,627 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:31,627 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:31,629 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:31,629 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,644 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:31,644 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:31,647 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:31,647 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,663 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:31,664 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:31,666 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:31,666 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,681 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:31,681 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,708 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 00:22:31,708 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:31,712 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 00:22:31,725 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:31,725 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:31,725 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:31,725 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:31,725 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 00:22:31,725 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:31,725 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:31,725 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:31,725 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-09 00:22:31,725 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:31,725 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:31,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:31,756 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:31,759 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 00:22:31,760 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:31,761 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:31,761 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:31,762 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:31,762 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:31,762 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:31,763 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:31,763 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:31,764 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:31,764 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:31,765 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:31,765 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:31,765 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:31,765 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:31,765 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:31,766 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:31,766 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:31,766 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:31,767 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:31,767 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:31,767 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:31,767 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:31,767 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:31,767 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:31,768 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:31,768 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:31,768 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:31,769 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:31,769 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:31,769 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:31,769 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:31,769 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:31,769 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:31,770 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:31,770 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:31,772 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 00:22:31,774 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-09 00:22:31,775 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-09 00:22:31,776 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 00:22:31,776 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 00:22:31,776 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 00:22:31,776 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-12-09 00:22:31,777 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 00:22:31,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:31,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:31,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 00:22:31,903 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2018-12-09 00:22:31,903 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand 9 states. [2018-12-09 00:22:32,132 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 101 states and 147 transitions. Complement of second has 42 states. [2018-12-09 00:22:32,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-09 00:22:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2018-12-09 00:22:32,135 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2018-12-09 00:22:32,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2018-12-09 00:22:32,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2018-12-09 00:22:32,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,137 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2018-12-09 00:22:32,140 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,142 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2018-12-09 00:22:32,142 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2018-12-09 00:22:32,143 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2018-12-09 00:22:32,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2018-12-09 00:22:32,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:32,143 INFO L705 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2018-12-09 00:22:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2018-12-09 00:22:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-12-09 00:22:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 00:22:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2018-12-09 00:22:32,151 INFO L728 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2018-12-09 00:22:32,151 INFO L608 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2018-12-09 00:22:32,151 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-09 00:22:32,152 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2018-12-09 00:22:32,152 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,153 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:32,153 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:32,153 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:32,153 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 00:22:32,153 INFO L794 eck$LassoCheckResult]: Stem: 371#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; 334#L25 call main_#t~ret6 := rec2(main_~x~0);< 333#rec2ENTRY ~j := #in~j; 336#L18 assume !(~j <= 0); 366#L20 call #t~ret3 := rec1(~j);< 378#rec1ENTRY ~i := #in~i; 365#L12 assume !(~i <= 0); 345#L14 call #t~ret0 := rec1(~i - 2);< 339#rec1ENTRY [2018-12-09 00:22:32,153 INFO L796 eck$LassoCheckResult]: Loop: 339#rec1ENTRY ~i := #in~i; 347#L12 assume !(~i <= 0); 344#L14 call #t~ret0 := rec1(~i - 2);< 339#rec1ENTRY [2018-12-09 00:22:32,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2018-12-09 00:22:32,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-12-09 00:22:32,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,163 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2018-12-09 00:22:32,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,188 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:32,188 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:32,188 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:32,188 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:32,188 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 00:22:32,188 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,188 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:32,188 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:32,188 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-09 00:22:32,188 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:32,188 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:32,189 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,216 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:32,217 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,218 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,218 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,220 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,220 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,234 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,235 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,236 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,237 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,251 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,251 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,252 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,253 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,267 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,268 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,269 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,270 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,284 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,284 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,299 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 00:22:32,300 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,315 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 00:22:32,316 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:32,316 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:32,316 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:32,316 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:32,316 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 00:22:32,316 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,316 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:32,316 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:32,316 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-09 00:22:32,316 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:32,316 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:32,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,341 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:32,341 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 00:22:32,342 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,342 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,342 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,342 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,342 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,342 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,343 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,343 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,344 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:32,344 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,344 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,344 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,344 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,345 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,345 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,345 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,345 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,345 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:32,346 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,346 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,346 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,346 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,346 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,346 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,347 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,347 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,347 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:32,347 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,348 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,348 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,348 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,348 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,348 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,348 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,348 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,350 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 00:22:32,351 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-09 00:22:32,352 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 00:22:32,352 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 00:22:32,352 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 00:22:32,352 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 00:22:32,352 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-09 00:22:32,352 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 00:22:32,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:32,396 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-12-09 00:22:32,396 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand 4 states. [2018-12-09 00:22:32,428 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40. Second operand 4 states. Result 108 states and 165 transitions. Complement of second has 13 states. [2018-12-09 00:22:32,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-09 00:22:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-12-09 00:22:32,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2018-12-09 00:22:32,430 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2018-12-09 00:22:32,430 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2018-12-09 00:22:32,430 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,430 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2018-12-09 00:22:32,433 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,435 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2018-12-09 00:22:32,435 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2018-12-09 00:22:32,436 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-12-09 00:22:32,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2018-12-09 00:22:32,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:32,436 INFO L705 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2018-12-09 00:22:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2018-12-09 00:22:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2018-12-09 00:22:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-09 00:22:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2018-12-09 00:22:32,443 INFO L728 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2018-12-09 00:22:32,443 INFO L608 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2018-12-09 00:22:32,443 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-09 00:22:32,443 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2018-12-09 00:22:32,444 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,444 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:32,444 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:32,444 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:32,444 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 00:22:32,445 INFO L794 eck$LassoCheckResult]: Stem: 604#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; 605#L25 call main_#t~ret6 := rec2(main_~x~0);< 609#rec2ENTRY ~j := #in~j; 629#L18 assume !(~j <= 0); 576#L20 call #t~ret3 := rec1(~j);< 575#rec1ENTRY ~i := #in~i; 577#L12 assume !(~i <= 0); 595#L14 call #t~ret0 := rec1(~i - 2);< 606#rec1ENTRY ~i := #in~i; 641#L12 assume ~i <= 0;#res := 0; 640#rec1FINAL assume true; 614#rec1EXIT >#27#return; 588#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 590#rec1ENTRY [2018-12-09 00:22:32,445 INFO L796 eck$LassoCheckResult]: Loop: 590#rec1ENTRY ~i := #in~i; 624#L12 assume !(~i <= 0); 596#L14 call #t~ret0 := rec1(~i - 2);< 590#rec1ENTRY [2018-12-09 00:22:32,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2018-12-09 00:22:32,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:32,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-12-09 00:22:32,453 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2018-12-09 00:22:32,457 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:32,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 00:22:32,480 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:22:32,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 00:22:32,501 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:32,501 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:32,501 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:32,501 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:32,502 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 00:22:32,502 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,502 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:32,502 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:32,502 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-12-09 00:22:32,502 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:32,502 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:32,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,525 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:32,525 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,526 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,526 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,528 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,528 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,543 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,543 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,545 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,545 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,569 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,569 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,571 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:32,571 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,585 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:32,585 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,601 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 00:22:32,601 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:32,616 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 00:22:32,617 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:32,617 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:32,617 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:32,617 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:32,618 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 00:22:32,618 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:32,618 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:32,618 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:32,618 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-12-09 00:22:32,618 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:32,618 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:32,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:32,643 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:32,643 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 00:22:32,644 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,644 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,644 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,644 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,644 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,644 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,644 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,644 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,645 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:32,645 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,646 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,646 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,646 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,646 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,646 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,646 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,646 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,647 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:32,647 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:32,647 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:32,647 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:32,647 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:32,647 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:32,647 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:32,647 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:32,648 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:32,649 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 00:22:32,650 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-09 00:22:32,650 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 00:22:32,650 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 00:22:32,650 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 00:22:32,650 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 00:22:32,650 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-09 00:22:32,651 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 00:22:32,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:32,705 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:32,705 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand 5 states. [2018-12-09 00:22:32,753 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57. Second operand 5 states. Result 132 states and 207 transitions. Complement of second has 14 states. [2018-12-09 00:22:32,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-12-09 00:22:32,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2018-12-09 00:22:32,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2018-12-09 00:22:32,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2018-12-09 00:22:32,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:32,755 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2018-12-09 00:22:32,757 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,760 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2018-12-09 00:22:32,760 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2018-12-09 00:22:32,761 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2018-12-09 00:22:32,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2018-12-09 00:22:32,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:32,761 INFO L705 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2018-12-09 00:22:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2018-12-09 00:22:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2018-12-09 00:22:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-12-09 00:22:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2018-12-09 00:22:32,771 INFO L728 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2018-12-09 00:22:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 00:22:32,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 00:22:32,771 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand 6 states. [2018-12-09 00:22:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:32,795 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2018-12-09 00:22:32,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 00:22:32,795 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2018-12-09 00:22:32,797 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-12-09 00:22:32,798 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2018-12-09 00:22:32,798 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2018-12-09 00:22:32,799 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2018-12-09 00:22:32,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2018-12-09 00:22:32,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:32,799 INFO L705 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2018-12-09 00:22:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2018-12-09 00:22:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2018-12-09 00:22:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-09 00:22:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2018-12-09 00:22:32,804 INFO L728 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2018-12-09 00:22:32,804 INFO L608 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2018-12-09 00:22:32,804 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-09 00:22:32,804 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2018-12-09 00:22:32,806 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-09 00:22:32,806 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:32,806 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:32,806 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:32,806 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:32,806 INFO L794 eck$LassoCheckResult]: Stem: 1181#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; 1182#L25 call main_#t~ret6 := rec2(main_~x~0);< 1187#rec2ENTRY ~j := #in~j; 1200#L18 assume !(~j <= 0); 1150#L20 call #t~ret3 := rec1(~j);< 1199#rec1ENTRY ~i := #in~i; 1198#L12 assume !(~i <= 0); 1146#L14 call #t~ret0 := rec1(~i - 2);< 1196#rec1ENTRY ~i := #in~i; 1195#L12 assume !(~i <= 0); 1168#L14 call #t~ret0 := rec1(~i - 2);< 1194#rec1ENTRY ~i := #in~i; 1197#L12 assume ~i <= 0;#res := 0; 1213#rec1FINAL assume true; 1212#rec1EXIT >#27#return; 1139#L14-1 [2018-12-09 00:22:32,807 INFO L796 eck$LassoCheckResult]: Loop: 1139#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1137#rec1ENTRY ~i := #in~i; 1140#L12 assume ~i <= 0;#res := 0; 1216#rec1FINAL assume true; 1207#rec1EXIT >#29#return; 1164#L14-2 call #t~ret2 := rec1(#t~ret1);< 1178#rec1ENTRY ~i := #in~i; 1210#L12 assume !(~i <= 0); 1162#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1210#L12 assume ~i <= 0;#res := 0; 1209#rec1FINAL assume true; 1208#rec1EXIT >#27#return; 1139#L14-1 [2018-12-09 00:22:32,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2018-12-09 00:22:32,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:32,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2018-12-09 00:22:32,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 00:22:32,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:22:32,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:22:32,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:32,855 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 00:22:32,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-09 00:22:32,856 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-09 00:22:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 00:22:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 00:22:32,856 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 Second operand 6 states. [2018-12-09 00:22:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:32,887 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2018-12-09 00:22:32,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 00:22:32,887 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2018-12-09 00:22:32,888 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,889 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2018-12-09 00:22:32,889 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2018-12-09 00:22:32,890 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2018-12-09 00:22:32,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2018-12-09 00:22:32,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:32,890 INFO L705 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2018-12-09 00:22:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2018-12-09 00:22:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2018-12-09 00:22:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-12-09 00:22:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2018-12-09 00:22:32,895 INFO L728 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2018-12-09 00:22:32,895 INFO L608 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2018-12-09 00:22:32,895 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-09 00:22:32,895 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2018-12-09 00:22:32,896 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-09 00:22:32,896 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:32,896 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:32,896 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:32,896 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 00:22:32,897 INFO L794 eck$LassoCheckResult]: Stem: 1455#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1456#L25 call main_#t~ret6 := rec2(main_~x~0);< 1463#rec2ENTRY ~j := #in~j; 1485#L18 assume !(~j <= 0); 1465#L20 call #t~ret3 := rec1(~j);< 1478#rec1ENTRY ~i := #in~i; 1475#L12 assume !(~i <= 0); 1425#L14 call #t~ret0 := rec1(~i - 2);< 1472#rec1ENTRY ~i := #in~i; 1470#L12 assume !(~i <= 0); 1423#L14 call #t~ret0 := rec1(~i - 2);< 1469#rec1ENTRY ~i := #in~i; 1471#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1480#rec1EXIT >#27#return; 1432#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1433#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1491#rec1FINAL assume true; 1490#rec1EXIT >#29#return; 1412#L14-2 call #t~ret2 := rec1(#t~ret1);< 1411#rec1ENTRY ~i := #in~i; 1413#L12 assume ~i <= 0;#res := 0; 1449#rec1FINAL assume true; 1451#rec1EXIT >#31#return; 1444#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret2;havoc #t~ret1; 1418#rec1FINAL assume true; 1428#rec1EXIT >#27#return; 1427#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1458#rec1ENTRY [2018-12-09 00:22:32,897 INFO L796 eck$LassoCheckResult]: Loop: 1458#rec1ENTRY ~i := #in~i; 1488#L12 assume !(~i <= 0); 1419#L14 call #t~ret0 := rec1(~i - 2);< 1458#rec1ENTRY [2018-12-09 00:22:32,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2018-12-09 00:22:32,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2018-12-09 00:22:32,906 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:22:32,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:32,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2018-12-09 00:22:32,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:32,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:32,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:32,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-09 00:22:32,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:22:32,956 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:22:32,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 00:22:32,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:22:32,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:22:32,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-09 00:22:33,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 00:22:33,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-09 00:22:33,016 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:33,016 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:33,016 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:33,016 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:33,016 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 00:22:33,016 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,016 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:33,016 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:33,016 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-12-09 00:22:33,016 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:33,016 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:33,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,038 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:33,038 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,040 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,040 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,043 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,044 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,058 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,059 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,060 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,060 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,076 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,076 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,078 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,078 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,093 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,093 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,109 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 00:22:33,109 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,124 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 00:22:33,126 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:33,126 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:33,126 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:33,126 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:33,126 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 00:22:33,126 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,126 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:33,126 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:33,126 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-12-09 00:22:33,126 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:33,127 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:33,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,152 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:33,152 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 00:22:33,152 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,153 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,153 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,153 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,153 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,153 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,153 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,153 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,154 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:33,154 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,154 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,154 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,154 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,154 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,154 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,154 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,154 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,155 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:33,155 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,155 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,155 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,155 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,155 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,155 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,156 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,156 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,157 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 00:22:33,158 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-09 00:22:33,158 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 00:22:33,158 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 00:22:33,158 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 00:22:33,158 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 00:22:33,158 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-09 00:22:33,158 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 00:22:33,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:33,217 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:33,217 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-12-09 00:22:33,248 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2018-12-09 00:22:33,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-12-09 00:22:33,249 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-09 00:22:33,249 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:33,250 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 00:22:33,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:33,327 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:33,327 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-12-09 00:22:33,360 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2018-12-09 00:22:33,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-12-09 00:22:33,361 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-09 00:22:33,361 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:33,361 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 00:22:33,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:33,420 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:33,421 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-12-09 00:22:33,489 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 156 states and 218 transitions. Complement of second has 13 states. [2018-12-09 00:22:33,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-12-09 00:22:33,489 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-09 00:22:33,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:33,490 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-09 00:22:33,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:33,490 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2018-12-09 00:22:33,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:33,491 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2018-12-09 00:22:33,493 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2018-12-09 00:22:33,495 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2018-12-09 00:22:33,495 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2018-12-09 00:22:33,496 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2018-12-09 00:22:33,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2018-12-09 00:22:33,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:33,496 INFO L705 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2018-12-09 00:22:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2018-12-09 00:22:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2018-12-09 00:22:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-09 00:22:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2018-12-09 00:22:33,504 INFO L728 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2018-12-09 00:22:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 00:22:33,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-09 00:22:33,505 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 8 states. [2018-12-09 00:22:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:33,541 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2018-12-09 00:22:33,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 00:22:33,542 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2018-12-09 00:22:33,543 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-12-09 00:22:33,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2018-12-09 00:22:33,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-12-09 00:22:33,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-12-09 00:22:33,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2018-12-09 00:22:33,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 00:22:33,544 INFO L705 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-09 00:22:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2018-12-09 00:22:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2018-12-09 00:22:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-09 00:22:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2018-12-09 00:22:33,547 INFO L728 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2018-12-09 00:22:33,547 INFO L608 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2018-12-09 00:22:33,547 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-09 00:22:33,547 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2018-12-09 00:22:33,548 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-12-09 00:22:33,548 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 00:22:33,548 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 00:22:33,548 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:22:33,548 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 00:22:33,549 INFO L794 eck$LassoCheckResult]: Stem: 2631#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2602#L25 call main_#t~ret6 := rec2(main_~x~0);< 2601#rec2ENTRY ~j := #in~j; 2603#L18 assume !(~j <= 0); 2633#L20 call #t~ret3 := rec1(~j);< 2651#rec1ENTRY ~i := #in~i; 2649#L12 assume !(~i <= 0); 2621#L14 call #t~ret0 := rec1(~i - 2);< 2647#rec1ENTRY ~i := #in~i; 2650#L12 assume ~i <= 0;#res := 0; 2648#rec1FINAL assume true; 2629#rec1EXIT >#27#return; 2630#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2622#rec1ENTRY ~i := #in~i; 2645#L12 assume ~i <= 0;#res := 0; 2643#rec1FINAL assume true; 2639#rec1EXIT >#29#return; 2638#L14-2 call #t~ret2 := rec1(#t~ret1);< 2628#rec1ENTRY ~i := #in~i; 2641#L12 assume ~i <= 0;#res := 0; 2640#rec1FINAL assume true; 2637#rec1EXIT >#31#return; 2636#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret2;havoc #t~ret1; 2635#rec1FINAL assume true; 2634#rec1EXIT >#33#return; 2605#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2604#rec2ENTRY ~j := #in~j; 2607#L18 assume !(~j <= 0); 2611#L20 call #t~ret3 := rec1(~j);< 2608#rec1ENTRY [2018-12-09 00:22:33,549 INFO L796 eck$LassoCheckResult]: Loop: 2608#rec1ENTRY ~i := #in~i; 2610#L12 assume !(~i <= 0); 2609#L14 call #t~ret0 := rec1(~i - 2);< 2608#rec1ENTRY [2018-12-09 00:22:33,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2018-12-09 00:22:33,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:33,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:33,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:33,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:33,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 00:22:33,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:22:33,582 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:22:33,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 00:22:33,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 00:22:33,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:22:33,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 00:22:33,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 00:22:33,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-09 00:22:33,612 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-09 00:22:33,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2018-12-09 00:22:33,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 00:22:33,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 00:22:33,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:33,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 00:22:33,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:22:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:22:33,636 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:33,636 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:33,636 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:33,636 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:33,636 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 00:22:33,636 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,636 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:33,636 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:33,636 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-12-09 00:22:33,636 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:33,636 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:33,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,659 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:33,659 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,661 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,661 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,663 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,663 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,678 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,678 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,680 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,680 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,695 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,695 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,697 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,697 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,711 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,712 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,713 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 00:22:33,713 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_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,728 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 00:22:33,728 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43bae1c0-cb3c-42e5-8562-dec496580492/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,744 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 00:22:33,744 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 00:22:33,759 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 00:22:33,761 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 00:22:33,761 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 00:22:33,761 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 00:22:33,761 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 00:22:33,761 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 00:22:33,761 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 00:22:33,761 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 00:22:33,761 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 00:22:33,761 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-12-09 00:22:33,761 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 00:22:33,761 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 00:22:33,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 00:22:33,788 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 00:22:33,788 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 00:22:33,788 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,788 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,789 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,789 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,789 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,789 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,789 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,789 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,789 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:33,790 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,790 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,790 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,790 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,790 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,790 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,790 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,791 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,791 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:33,791 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,791 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,791 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,792 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,792 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,792 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,792 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,792 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,792 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:33,793 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,793 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,793 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,793 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,793 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,793 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,793 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,793 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,794 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 00:22:33,794 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-09 00:22:33,794 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 00:22:33,794 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 00:22:33,794 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 00:22:33,794 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 00:22:33,795 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 00:22:33,795 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 00:22:33,795 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 00:22:33,796 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 00:22:33,797 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-09 00:22:33,797 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 00:22:33,797 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 00:22:33,797 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 00:22:33,797 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 00:22:33,797 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-09 00:22:33,797 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 00:22:33,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:33,867 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:33,868 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-12-09 00:22:33,901 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2018-12-09 00:22:33,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2018-12-09 00:22:33,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-09 00:22:33,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:33,902 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 00:22:33,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:33,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:33,966 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:33,966 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-12-09 00:22:34,000 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2018-12-09 00:22:34,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2018-12-09 00:22:34,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-09 00:22:34,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:34,001 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 00:22:34,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:22:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:34,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:22:34,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:22:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:22:34,064 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-09 00:22:34,064 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-12-09 00:22:34,116 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 77 states and 89 transitions. Complement of second has 13 states. [2018-12-09 00:22:34,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-09 00:22:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 00:22:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-12-09 00:22:34,116 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-09 00:22:34,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:34,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-09 00:22:34,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:34,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2018-12-09 00:22:34,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 00:22:34,117 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2018-12-09 00:22:34,118 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 00:22:34,118 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2018-12-09 00:22:34,118 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-09 00:22:34,118 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-09 00:22:34,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-09 00:22:34,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 00:22:34,118 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 00:22:34,118 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 00:22:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 00:22:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-09 00:22:34,119 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2018-12-09 00:22:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:22:34,119 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-09 00:22:34,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 00:22:34,119 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-12-09 00:22:34,119 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 00:22:34,119 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 00:22:34,119 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-09 00:22:34,119 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-09 00:22:34,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-09 00:22:34,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 00:22:34,119 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 00:22:34,119 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 00:22:34,119 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 00:22:34,120 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-09 00:22:34,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-09 00:22:34,120 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 00:22:34,120 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-09 00:22:34,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.12 12:22:34 BoogieIcfgContainer [2018-12-09 00:22:34,124 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-09 00:22:34,124 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 00:22:34,124 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 00:22:34,124 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 00:22:34,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:22:31" (3/4) ... [2018-12-09 00:22:34,127 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 00:22:34,127 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 00:22:34,127 INFO L168 Benchmark]: Toolchain (without parser) took 3406.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 962.4 MB in the beginning and 713.5 MB in the end (delta: 249.0 MB). Peak memory consumption was 425.1 MB. Max. memory is 11.5 GB. [2018-12-09 00:22:34,128 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:22:34,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 122.55 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 00:22:34,129 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.80 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:22:34,129 INFO L168 Benchmark]: Boogie Preprocessor took 9.20 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 00:22:34,129 INFO L168 Benchmark]: RCFGBuilder took 142.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 946.3 MB in the beginning and 1.0 GB in the end (delta: -103.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-12-09 00:22:34,130 INFO L168 Benchmark]: BuchiAutomizer took 3105.24 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 104.9 MB). Free memory was 1.0 GB in the beginning and 713.5 MB in the end (delta: 336.4 MB). Peak memory consumption was 441.2 MB. Max. memory is 11.5 GB. [2018-12-09 00:22:34,130 INFO L168 Benchmark]: Witness Printer took 2.86 ms. Allocated memory is still 1.2 GB. Free memory is still 713.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:22:34,131 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 122.55 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.80 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.20 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 142.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 946.3 MB in the beginning and 1.0 GB in the end (delta: -103.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3105.24 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 104.9 MB). Free memory was 1.0 GB in the beginning and 713.5 MB in the end (delta: 336.4 MB). Peak memory consumption was 441.2 MB. Max. memory is 11.5 GB. * Witness Printer took 2.86 ms. Allocated memory is still 1.2 GB. Free memory is still 713.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.0s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 1.5s. Construction of modules took 0.2s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 111 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 188 SDtfs, 186 SDslu, 311 SDs, 0 SdLazy, 306 SolverSat, 135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 4ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...