./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 aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/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-aa41828 [2018-11-23 08:32:54,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 08:32:54,514 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 08:32:54,520 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 08:32:54,521 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 08:32:54,521 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 08:32:54,522 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 08:32:54,523 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 08:32:54,525 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 08:32:54,525 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 08:32:54,526 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 08:32:54,526 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 08:32:54,527 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 08:32:54,527 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 08:32:54,528 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 08:32:54,528 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 08:32:54,528 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 08:32:54,530 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 08:32:54,531 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 08:32:54,532 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 08:32:54,533 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 08:32:54,533 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 08:32:54,534 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 08:32:54,534 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 08:32:54,535 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 08:32:54,535 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 08:32:54,536 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 08:32:54,536 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 08:32:54,537 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 08:32:54,537 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 08:32:54,538 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 08:32:54,538 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 08:32:54,538 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 08:32:54,538 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 08:32:54,539 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 08:32:54,540 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 08:32:54,540 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-23 08:32:54,549 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 08:32:54,549 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 08:32:54,550 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 08:32:54,550 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 08:32:54,550 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 08:32:54,550 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 08:32:54,551 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 08:32:54,551 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 08:32:54,552 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 08:32:54,553 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 08:32:54,553 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 08:32:54,553 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 08:32:54,553 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 08:32:54,553 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 08:32:54,553 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 08:32:54,554 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 08:32:54,554 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_4259cf03-67ef-4589-82ba-db1782cade64/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 [2018-11-23 08:32:54,578 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 08:32:54,587 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 08:32:54,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 08:32:54,590 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 08:32:54,591 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 08:32:54,591 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 08:32:54,633 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/data/7b151330b/02ce05d442a34adb843f96808988f82e/FLAG0cc6f67eb [2018-11-23 08:32:54,969 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 08:32:54,970 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 08:32:54,976 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/data/7b151330b/02ce05d442a34adb843f96808988f82e/FLAG0cc6f67eb [2018-11-23 08:32:54,989 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/data/7b151330b/02ce05d442a34adb843f96808988f82e [2018-11-23 08:32:54,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 08:32:54,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 08:32:54,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 08:32:54,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 08:32:54,997 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 08:32:54,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:54" (1/1) ... [2018-11-23 08:32:55,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12858536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54, skipping insertion in model container [2018-11-23 08:32:55,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:54" (1/1) ... [2018-11-23 08:32:55,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 08:32:55,022 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 08:32:55,152 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 08:32:55,155 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 08:32:55,166 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 08:32:55,175 INFO L195 MainTranslator]: Completed translation [2018-11-23 08:32:55,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55 WrapperNode [2018-11-23 08:32:55,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 08:32:55,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 08:32:55,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 08:32:55,176 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 08:32:55,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 08:32:55,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 08:32:55,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 08:32:55,198 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 08:32:55,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2018-11-23 08:32:55,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 08:32:55,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 08:32:55,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 08:32:55,209 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 08:32:55,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-23 08:32:55,285 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-23 08:32:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-23 08:32:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-23 08:32:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 08:32:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 08:32:55,372 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 08:32:55,373 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 08:32:55,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:55 BoogieIcfgContainer [2018-11-23 08:32:55,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 08:32:55,373 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 08:32:55,373 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 08:32:55,376 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 08:32:55,376 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 08:32:55,377 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 08:32:54" (1/3) ... [2018-11-23 08:32:55,377 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@583d1dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 08:32:55, skipping insertion in model container [2018-11-23 08:32:55,378 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 08:32:55,378 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (2/3) ... [2018-11-23 08:32:55,378 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@583d1dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 08:32:55, skipping insertion in model container [2018-11-23 08:32:55,378 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 08:32:55,378 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:55" (3/3) ... [2018-11-23 08:32:55,380 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 08:32:55,422 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 08:32:55,423 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 08:32:55,423 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 08:32:55,423 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 08:32:55,423 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 08:32:55,423 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 08:32:55,423 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 08:32:55,423 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 08:32:55,423 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 08:32:55,432 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-23 08:32:55,448 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:55,448 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:55,448 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:55,453 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 08:32:55,453 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:55,453 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 08:32:55,453 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-23 08:32:55,456 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:55,456 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:55,456 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:55,457 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 08:32:55,457 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:55,464 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-23 08:32:55,465 INFO L796 eck$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 [2018-11-23 08:32:55,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-11-23 08:32:55,472 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:55,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:55,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:55,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2018-11-23 08:32:55,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:55,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:55,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:55,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:55,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 08:32:55,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 08:32:55,598 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 08:32:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 08:32:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 08:32:55,610 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-11-23 08:32:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:32:55,673 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-11-23 08:32:55,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 08:32:55,676 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2018-11-23 08:32:55,678 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:55,684 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2018-11-23 08:32:55,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 08:32:55,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2018-11-23 08:32:55,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2018-11-23 08:32:55,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 08:32:55,688 INFO L705 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-11-23 08:32:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2018-11-23 08:32:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-23 08:32:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-23 08:32:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-11-23 08:32:55,714 INFO L728 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-11-23 08:32:55,714 INFO L608 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-11-23 08:32:55,714 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 08:32:55,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2018-11-23 08:32:55,715 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:55,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:55,715 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:55,716 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 08:32:55,716 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:55,717 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 [2018-11-23 08:32:55,718 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~ret2;havoc #t~ret1;havoc #t~ret0; 72#rec1FINAL assume true; 74#rec1EXIT >#33#return; 61#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 59#rec2ENTRY [2018-11-23 08:32:55,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2018-11-23 08:32:55,718 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:55,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2018-11-23 08:32:55,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:55,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:55,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:55,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:55,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2018-11-23 08:32:55,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:55,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:55,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:55,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,079 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:56,080 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:56,080 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:56,080 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:56,081 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 08:32:56,081 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,081 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:56,081 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:56,081 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-23 08:32:56,081 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:56,082 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:56,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,141 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:56,141 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,145 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,145 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,151 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,151 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,167 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,167 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,170 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,170 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,186 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,186 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,189 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,189 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,214 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,214 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,217 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,217 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,234 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,234 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,253 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 08:32:56,253 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,257 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 08:32:56,271 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:56,271 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:56,271 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:56,271 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:56,272 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 08:32:56,272 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,272 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:56,272 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:56,272 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-23 08:32:56,272 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:56,272 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:56,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,311 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:56,314 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 08:32:56,315 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:56,316 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:56,316 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:56,317 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:56,317 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:56,317 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:56,318 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:56,318 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:56,321 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:56,321 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:56,322 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:56,322 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:56,322 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:56,322 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:56,322 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:56,322 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:56,323 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:56,323 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:56,324 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:56,324 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:56,327 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:56,327 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:56,327 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:56,327 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:56,328 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:56,328 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:56,329 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:56,329 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:56,329 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:56,329 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:56,330 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:56,330 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:56,330 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:56,330 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:56,330 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:56,334 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 08:32:56,337 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 08:32:56,337 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 08:32:56,339 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 08:32:56,339 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 08:32:56,340 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 08:32:56,340 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-23 08:32:56,341 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 08:32:56,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:56,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:56,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-23 08:32:56,544 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 [2018-11-23 08:32:56,545 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand 9 states. [2018-11-23 08:32:56,837 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. [2018-11-23 08:32:56,839 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 [2018-11-23 08:32:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-23 08:32:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2018-11-23 08:32:56,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2018-11-23 08:32:56,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:56,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2018-11-23 08:32:56,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:56,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2018-11-23 08:32:56,844 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:56,844 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2018-11-23 08:32:56,849 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:56,853 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2018-11-23 08:32:56,853 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2018-11-23 08:32:56,853 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2018-11-23 08:32:56,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2018-11-23 08:32:56,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:56,854 INFO L705 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2018-11-23 08:32:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2018-11-23 08:32:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-11-23 08:32:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-23 08:32:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2018-11-23 08:32:56,867 INFO L728 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2018-11-23 08:32:56,867 INFO L608 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2018-11-23 08:32:56,867 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 08:32:56,867 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2018-11-23 08:32:56,868 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:56,869 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:56,869 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:56,869 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:56,869 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 08:32:56,869 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 [2018-11-23 08:32:56,869 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 [2018-11-23 08:32:56,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2018-11-23 08:32:56,870 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:56,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:56,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:56,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:56,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-11-23 08:32:56,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:56,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:56,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2018-11-23 08:32:56,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:56,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:56,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:56,904 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:56,904 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:56,904 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:56,904 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:56,904 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 08:32:56,905 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,905 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:56,905 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:56,905 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-23 08:32:56,905 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:56,905 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:56,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:56,928 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:56,929 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,930 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,931 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,932 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,933 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,947 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,947 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,949 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,949 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,964 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,964 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,966 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,966 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:56,981 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:56,981 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:56,983 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:56,983 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,006 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,007 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,028 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 08:32:57,028 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,053 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 08:32:57,053 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:57,054 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:57,054 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:57,054 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:57,054 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 08:32:57,054 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,054 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:57,054 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:57,054 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-23 08:32:57,054 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:57,054 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:57,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,086 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:57,086 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 08:32:57,086 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,087 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,087 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,087 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,087 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,087 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,088 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,088 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,088 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:57,089 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,089 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,089 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,089 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,089 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,089 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,090 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,090 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,090 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:57,090 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,091 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,091 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,091 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,091 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,091 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,091 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,091 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,092 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:57,092 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,093 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,093 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,093 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,093 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,093 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,094 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,094 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,097 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 08:32:57,099 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 08:32:57,099 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 08:32:57,099 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 08:32:57,099 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 08:32:57,100 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 08:32:57,100 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 08:32:57,100 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 08:32:57,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:57,152 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-23 08:32:57,152 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand 4 states. [2018-11-23 08:32:57,178 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. [2018-11-23 08:32:57,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 08:32:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-11-23 08:32:57,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2018-11-23 08:32:57,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:57,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2018-11-23 08:32:57,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:57,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2018-11-23 08:32:57,181 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:57,181 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2018-11-23 08:32:57,184 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:57,187 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2018-11-23 08:32:57,188 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2018-11-23 08:32:57,188 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-11-23 08:32:57,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2018-11-23 08:32:57,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:57,189 INFO L705 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2018-11-23 08:32:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2018-11-23 08:32:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2018-11-23 08:32:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-23 08:32:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2018-11-23 08:32:57,198 INFO L728 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2018-11-23 08:32:57,198 INFO L608 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2018-11-23 08:32:57,198 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 08:32:57,198 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2018-11-23 08:32:57,199 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:57,199 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:57,199 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:57,200 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:57,200 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 08:32:57,200 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 [2018-11-23 08:32:57,200 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 [2018-11-23 08:32:57,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2018-11-23 08:32:57,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,210 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-11-23 08:32:57,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:57,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2018-11-23 08:32:57,214 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:57,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 08:32:57,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 08:32:57,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 08:32:57,248 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:57,248 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:57,248 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:57,248 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:57,248 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 08:32:57,249 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,249 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:57,249 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:57,249 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-23 08:32:57,249 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:57,249 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:57,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,268 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:57,269 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,272 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,272 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,274 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:57,274 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,289 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,290 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,291 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:57,291 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,307 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,307 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,309 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:57,309 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,324 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,324 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/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 [2018-11-23 08:32:57,341 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 08:32:57,341 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,357 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 08:32:57,358 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:57,359 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:57,359 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:57,359 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:57,359 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 08:32:57,359 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,359 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:57,359 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:57,359 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-23 08:32:57,359 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:57,359 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:57,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,393 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:57,393 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 08:32:57,393 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,394 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,394 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,394 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,394 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,394 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,394 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,395 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,395 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:57,396 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,396 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,396 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,396 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,396 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,397 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,397 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,397 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,398 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:57,398 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:57,398 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:57,398 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:57,399 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:57,399 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:57,399 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:57,399 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:57,399 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:57,402 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 08:32:57,403 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 08:32:57,403 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 08:32:57,403 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 08:32:57,403 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 08:32:57,404 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 08:32:57,404 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 08:32:57,404 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 08:32:57,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:57,469 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:57,469 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand 5 states. [2018-11-23 08:32:57,550 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. [2018-11-23 08:32:57,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-11-23 08:32:57,553 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-23 08:32:57,553 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:57,553 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2018-11-23 08:32:57,554 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:57,554 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2018-11-23 08:32:57,554 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:57,554 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2018-11-23 08:32:57,557 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:57,560 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2018-11-23 08:32:57,560 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2018-11-23 08:32:57,560 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2018-11-23 08:32:57,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2018-11-23 08:32:57,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:57,560 INFO L705 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2018-11-23 08:32:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2018-11-23 08:32:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2018-11-23 08:32:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-11-23 08:32:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2018-11-23 08:32:57,572 INFO L728 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2018-11-23 08:32:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 08:32:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 08:32:57,572 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand 6 states. [2018-11-23 08:32:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:32:57,605 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2018-11-23 08:32:57,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 08:32:57,606 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2018-11-23 08:32:57,609 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-23 08:32:57,611 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2018-11-23 08:32:57,611 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2018-11-23 08:32:57,612 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2018-11-23 08:32:57,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2018-11-23 08:32:57,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:57,612 INFO L705 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2018-11-23 08:32:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2018-11-23 08:32:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2018-11-23 08:32:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-11-23 08:32:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2018-11-23 08:32:57,624 INFO L728 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2018-11-23 08:32:57,624 INFO L608 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2018-11-23 08:32:57,624 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 08:32:57,624 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2018-11-23 08:32:57,625 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 08:32:57,626 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:57,626 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:57,626 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:57,626 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:57,626 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 [2018-11-23 08:32:57,627 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 [2018-11-23 08:32:57,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2018-11-23 08:32:57,627 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:57,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2018-11-23 08:32:57,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:57,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 08:32:57,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 08:32:57,677 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 08:32:57,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:57,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 08:32:57,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-23 08:32:57,712 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 08:32:57,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 08:32:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 08:32:57,712 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 Second operand 6 states. [2018-11-23 08:32:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:32:57,759 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2018-11-23 08:32:57,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 08:32:57,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2018-11-23 08:32:57,762 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:57,768 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2018-11-23 08:32:57,768 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2018-11-23 08:32:57,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2018-11-23 08:32:57,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2018-11-23 08:32:57,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:57,768 INFO L705 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2018-11-23 08:32:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2018-11-23 08:32:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2018-11-23 08:32:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-23 08:32:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2018-11-23 08:32:57,778 INFO L728 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2018-11-23 08:32:57,778 INFO L608 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2018-11-23 08:32:57,778 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 08:32:57,778 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2018-11-23 08:32:57,779 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-23 08:32:57,779 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:57,779 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:57,780 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:57,780 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 08:32:57,783 INFO L794 eck$LassoCheckResult]: Stem: 1455#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1456#L25 call main_#t~ret6 := rec2(main_~x~0);< 1463#rec2ENTRY ~j := #in~j; 1485#L18 assume !(~j <= 0); 1465#L20 call #t~ret3 := rec1(~j);< 1478#rec1ENTRY ~i := #in~i; 1475#L12 assume !(~i <= 0); 1425#L14 call #t~ret0 := rec1(~i - 2);< 1472#rec1ENTRY ~i := #in~i; 1470#L12 assume !(~i <= 0); 1423#L14 call #t~ret0 := rec1(~i - 2);< 1469#rec1ENTRY ~i := #in~i; 1471#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1480#rec1EXIT >#27#return; 1432#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1433#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1491#rec1FINAL assume true; 1490#rec1EXIT >#29#return; 1412#L14-2 call #t~ret2 := rec1(#t~ret1);< 1411#rec1ENTRY ~i := #in~i; 1413#L12 assume ~i <= 0;#res := 0; 1449#rec1FINAL assume true; 1451#rec1EXIT >#31#return; 1444#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 1418#rec1FINAL assume true; 1428#rec1EXIT >#27#return; 1427#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1458#rec1ENTRY [2018-11-23 08:32:57,783 INFO L796 eck$LassoCheckResult]: Loop: 1458#rec1ENTRY ~i := #in~i; 1488#L12 assume !(~i <= 0); 1419#L14 call #t~ret0 := rec1(~i - 2);< 1458#rec1ENTRY [2018-11-23 08:32:57,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2018-11-23 08:32:57,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:57,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,796 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2018-11-23 08:32:57,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:32:57,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:57,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2018-11-23 08:32:57,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:57,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:57,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:57,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-23 08:32:57,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 08:32:57,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/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 [2018-11-23 08:32:57,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 08:32:57,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 08:32:57,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 08:32:57,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-23 08:32:57,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 08:32:57,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 08:32:57,914 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:57,914 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:57,915 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:57,915 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:57,915 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 08:32:57,915 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,915 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:57,915 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:57,915 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-23 08:32:57,915 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:57,915 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:57,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:57,939 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:57,939 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,944 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,944 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,947 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:57,947 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_4259cf03-67ef-4589-82ba-db1782cade64/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 [2018-11-23 08:32:57,963 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,963 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,964 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:57,964 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,980 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,981 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:57,982 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:57,983 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:57,998 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:57,998 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,016 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 08:32:58,016 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:58,032 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 08:32:58,034 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:58,034 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:58,034 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:58,034 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:58,034 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 08:32:58,034 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,034 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:58,034 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:58,034 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-23 08:32:58,034 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:58,034 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:58,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,055 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:58,055 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 08:32:58,056 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,056 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,056 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,057 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,057 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,057 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,057 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,057 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,058 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:58,058 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,058 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,058 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,059 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,059 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,059 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,059 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,059 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,060 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:58,060 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,060 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,060 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,061 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,061 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,061 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,061 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,061 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,062 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 08:32:58,063 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 08:32:58,063 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 08:32:58,064 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 08:32:58,064 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 08:32:58,064 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 08:32:58,064 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 08:32:58,064 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 08:32:58,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:58,160 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:58,160 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-11-23 08:32:58,190 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. [2018-11-23 08:32:58,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-23 08:32:58,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2018-11-23 08:32:58,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:58,192 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 08:32:58,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:58,275 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:58,275 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-11-23 08:32:58,339 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. [2018-11-23 08:32:58,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:58,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-23 08:32:58,341 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2018-11-23 08:32:58,342 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:58,342 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 08:32:58,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:58,434 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:58,434 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-11-23 08:32:58,495 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. [2018-11-23 08:32:58,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-11-23 08:32:58,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2018-11-23 08:32:58,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:58,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-23 08:32:58,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:58,497 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2018-11-23 08:32:58,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:58,497 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2018-11-23 08:32:58,499 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2018-11-23 08:32:58,501 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2018-11-23 08:32:58,501 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2018-11-23 08:32:58,502 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2018-11-23 08:32:58,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2018-11-23 08:32:58,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:58,502 INFO L705 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2018-11-23 08:32:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2018-11-23 08:32:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2018-11-23 08:32:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-11-23 08:32:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2018-11-23 08:32:58,511 INFO L728 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2018-11-23 08:32:58,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 08:32:58,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-23 08:32:58,512 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 8 states. [2018-11-23 08:32:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:32:58,573 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2018-11-23 08:32:58,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 08:32:58,574 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2018-11-23 08:32:58,575 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-11-23 08:32:58,576 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2018-11-23 08:32:58,576 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-23 08:32:58,576 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-23 08:32:58,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2018-11-23 08:32:58,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 08:32:58,577 INFO L705 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-23 08:32:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2018-11-23 08:32:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2018-11-23 08:32:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-23 08:32:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2018-11-23 08:32:58,579 INFO L728 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2018-11-23 08:32:58,579 INFO L608 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2018-11-23 08:32:58,579 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-23 08:32:58,579 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2018-11-23 08:32:58,580 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-11-23 08:32:58,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 08:32:58,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 08:32:58,580 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:32:58,583 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 08:32:58,583 INFO L794 eck$LassoCheckResult]: Stem: 2631#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2602#L25 call main_#t~ret6 := rec2(main_~x~0);< 2601#rec2ENTRY ~j := #in~j; 2603#L18 assume !(~j <= 0); 2633#L20 call #t~ret3 := rec1(~j);< 2651#rec1ENTRY ~i := #in~i; 2649#L12 assume !(~i <= 0); 2621#L14 call #t~ret0 := rec1(~i - 2);< 2647#rec1ENTRY ~i := #in~i; 2650#L12 assume ~i <= 0;#res := 0; 2648#rec1FINAL assume true; 2629#rec1EXIT >#27#return; 2630#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2622#rec1ENTRY ~i := #in~i; 2645#L12 assume ~i <= 0;#res := 0; 2643#rec1FINAL assume true; 2639#rec1EXIT >#29#return; 2638#L14-2 call #t~ret2 := rec1(#t~ret1);< 2628#rec1ENTRY ~i := #in~i; 2641#L12 assume ~i <= 0;#res := 0; 2640#rec1FINAL assume true; 2637#rec1EXIT >#31#return; 2636#L14-3 #res := 1 + #t~ret2;havoc #t~ret2;havoc #t~ret1;havoc #t~ret0; 2635#rec1FINAL assume true; 2634#rec1EXIT >#33#return; 2605#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2604#rec2ENTRY ~j := #in~j; 2607#L18 assume !(~j <= 0); 2611#L20 call #t~ret3 := rec1(~j);< 2608#rec1ENTRY [2018-11-23 08:32:58,584 INFO L796 eck$LassoCheckResult]: Loop: 2608#rec1ENTRY ~i := #in~i; 2610#L12 assume !(~i <= 0); 2609#L14 call #t~ret0 := rec1(~i - 2);< 2608#rec1ENTRY [2018-11-23 08:32:58,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2018-11-23 08:32:58,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:58,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:58,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:58,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:58,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-23 08:32:58,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 08:32:58,613 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/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 [2018-11-23 08:32:58,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 08:32:58,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 08:32:58,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 08:32:58,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-23 08:32:58,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 08:32:58,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 08:32:58,675 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 08:32:58,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2018-11-23 08:32:58,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:32:58,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:32:58,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:58,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 08:32:58,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:32:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:32:58,699 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:58,699 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:58,699 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:58,699 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:58,699 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 08:32:58,699 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,699 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:58,699 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:58,699 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-23 08:32:58,700 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:58,700 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:58,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,726 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:58,726 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,741 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:58,741 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:58,749 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:58,749 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_4259cf03-67ef-4589-82ba-db1782cade64/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 [2018-11-23 08:32:58,770 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:58,770 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:58,773 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:58,773 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,790 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:58,790 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:58,793 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:58,793 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,809 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:58,809 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:58,811 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 08:32:58,811 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_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,827 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 08:32:58,827 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4259cf03-67ef-4589-82ba-db1782cade64/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,857 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 08:32:58,857 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 08:32:58,883 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 08:32:58,885 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 08:32:58,885 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 08:32:58,885 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 08:32:58,885 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 08:32:58,885 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 08:32:58,885 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 08:32:58,885 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 08:32:58,885 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 08:32:58,885 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-23 08:32:58,885 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 08:32:58,885 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 08:32:58,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 08:32:58,929 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 08:32:58,929 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 08:32:58,929 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,930 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,930 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,930 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,930 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,930 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,930 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,931 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,931 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:58,931 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,932 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,932 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,932 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,932 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,932 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,932 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,932 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,933 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:58,933 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,933 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,933 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,933 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,934 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,934 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,934 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,934 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,934 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:58,935 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,935 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,935 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,935 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,935 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,935 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,936 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,936 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,936 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 08:32:58,937 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 08:32:58,937 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 08:32:58,937 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 08:32:58,937 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 08:32:58,937 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 08:32:58,937 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 08:32:58,938 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 08:32:58,938 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 08:32:58,939 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 08:32:58,944 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 08:32:58,944 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 08:32:58,944 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 08:32:58,944 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 08:32:58,944 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 08:32:58,944 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 08:32:58,945 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 08:32:58,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:58,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:59,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:59,021 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:59,021 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-11-23 08:32:59,052 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. [2018-11-23 08:32:59,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2018-11-23 08:32:59,053 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2018-11-23 08:32:59,053 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:59,053 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 08:32:59,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:59,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:59,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:59,106 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:59,107 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-11-23 08:32:59,136 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. [2018-11-23 08:32:59,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2018-11-23 08:32:59,137 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2018-11-23 08:32:59,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:59,137 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 08:32:59,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:32:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:59,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:32:59,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:32:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 08:32:59,193 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 08:32:59,193 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-11-23 08:32:59,239 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. [2018-11-23 08:32:59,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 08:32:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 08:32:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-11-23 08:32:59,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2018-11-23 08:32:59,240 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:59,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-23 08:32:59,240 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:59,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2018-11-23 08:32:59,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 08:32:59,241 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2018-11-23 08:32:59,241 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 08:32:59,241 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2018-11-23 08:32:59,241 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 08:32:59,241 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 08:32:59,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 08:32:59,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 08:32:59,241 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 08:32:59,241 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 08:32:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-23 08:32:59,242 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2018-11-23 08:32:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:32:59,242 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-23 08:32:59,242 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 08:32:59,242 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 08:32:59,242 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 08:32:59,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 08:32:59,242 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-23 08:32:59,242 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 08:32:59,242 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 08:32:59,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 08:32:59,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 08:32:59 BoogieIcfgContainer [2018-11-23 08:32:59,247 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 08:32:59,247 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 08:32:59,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 08:32:59,247 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 08:32:59,248 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:55" (3/4) ... [2018-11-23 08:32:59,250 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 08:32:59,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 08:32:59,250 INFO L168 Benchmark]: Toolchain (without parser) took 4258.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.4 MB). Free memory was 958.2 MB in the beginning and 973.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 175.8 MB. Max. memory is 11.5 GB. [2018-11-23 08:32:59,251 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:32:59,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.67 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:32:59,252 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.54 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2018-11-23 08:32:59,252 INFO L168 Benchmark]: Boogie Preprocessor took 10.38 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:32:59,252 INFO L168 Benchmark]: RCFGBuilder took 164.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:32:59,253 INFO L168 Benchmark]: BuchiAutomizer took 3873.61 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 973.7 MB in the end (delta: 156.1 MB). Peak memory consumption was 203.3 MB. Max. memory is 11.5 GB. [2018-11-23 08:32:59,253 INFO L168 Benchmark]: Witness Printer took 2.83 ms. Allocated memory is still 1.2 GB. Free memory is still 973.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:32:59,255 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 181.67 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 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 22.54 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.38 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 164.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3873.61 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 973.7 MB in the end (delta: 156.1 MB). Peak memory consumption was 203.3 MB. Max. memory is 11.5 GB. * Witness Printer took 2.83 ms. Allocated memory is still 1.2 GB. Free memory is still 973.7 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 3.8s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 1.9s. Construction of modules took 0.3s. Büchi inclusion checks took 1.3s. 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, 0.3s 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: 5ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...