./Ultimate.py --spec /storage/repos/svcomp/c/properties/termination.prp --file /storage/repos/svcomp/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i /storage/repos/svcomp/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 1b7166d94206693c3f254a3c1de8d5825f8510fb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-0ed9222-m [2019-01-14 02:14:11,017 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 02:14:11,019 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 02:14:11,033 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 02:14:11,033 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 02:14:11,034 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 02:14:11,036 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 02:14:11,038 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 02:14:11,040 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 02:14:11,041 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 02:14:11,042 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 02:14:11,043 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 02:14:11,044 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 02:14:11,045 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 02:14:11,046 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 02:14:11,047 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 02:14:11,048 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 02:14:11,050 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 02:14:11,053 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 02:14:11,055 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 02:14:11,056 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 02:14:11,057 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 02:14:11,061 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 02:14:11,061 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 02:14:11,061 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 02:14:11,062 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 02:14:11,063 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 02:14:11,064 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 02:14:11,066 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 02:14:11,067 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 02:14:11,067 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 02:14:11,068 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 02:14:11,069 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 02:14:11,069 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 02:14:11,070 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 02:14:11,071 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 02:14:11,071 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-01-14 02:14:11,094 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 02:14:11,095 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 02:14:11,096 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 02:14:11,096 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 02:14:11,097 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 02:14:11,097 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-01-14 02:14:11,097 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-01-14 02:14:11,097 INFO L133 SettingsManager]: * Use old map elimination=false [2019-01-14 02:14:11,097 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2019-01-14 02:14:11,098 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2019-01-14 02:14:11,098 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-01-14 02:14:11,098 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 02:14:11,098 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-01-14 02:14:11,098 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 02:14:11,099 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 02:14:11,100 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-01-14 02:14:11,100 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-01-14 02:14:11,100 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-01-14 02:14:11,100 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-14 02:14:11,101 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-01-14 02:14:11,101 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-14 02:14:11,101 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-01-14 02:14:11,101 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 02:14:11,101 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 02:14:11,102 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-01-14 02:14:11,103 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 02:14:11,103 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 02:14:11,103 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-01-14 02:14:11,106 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-01-14 02:14:11,106 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-01-14 02:14:11,167 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 02:14:11,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 02:14:11,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 02:14:11,189 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 02:14:11,190 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 02:14:11,192 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2019-01-14 02:14:11,257 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299b44414/fcaa6e81e30942f39d2877d363b86261/FLAGa60a2b7a9 [2019-01-14 02:14:11,625 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 02:14:11,626 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2019-01-14 02:14:11,632 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299b44414/fcaa6e81e30942f39d2877d363b86261/FLAGa60a2b7a9 [2019-01-14 02:14:12,022 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299b44414/fcaa6e81e30942f39d2877d363b86261 [2019-01-14 02:14:12,029 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 02:14:12,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-14 02:14:12,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 02:14:12,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 02:14:12,037 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 02:14:12,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7a2377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12, skipping insertion in model container [2019-01-14 02:14:12,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 02:14:12,070 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 02:14:12,233 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 02:14:12,238 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 02:14:12,250 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 02:14:12,263 INFO L195 MainTranslator]: Completed translation [2019-01-14 02:14:12,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12 WrapperNode [2019-01-14 02:14:12,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 02:14:12,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-14 02:14:12,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-14 02:14:12,265 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-14 02:14:12,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-14 02:14:12,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 02:14:12,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 02:14:12,297 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 02:14:12,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... [2019-01-14 02:14:12,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 02:14:12,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 02:14:12,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 02:14:12,311 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 02:14:12,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:12,434 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-01-14 02:14:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-01-14 02:14:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 02:14:12,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 02:14:12,608 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 02:14:12,609 INFO L286 CfgBuilder]: Removed 4 assue(true) statements. [2019-01-14 02:14:12,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 02:14:12 BoogieIcfgContainer [2019-01-14 02:14:12,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 02:14:12,611 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-01-14 02:14:12,611 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-01-14 02:14:12,614 INFO L276 PluginConnector]: BuchiAutomizer initialized [2019-01-14 02:14:12,615 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-01-14 02:14:12,615 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.01 02:14:12" (1/3) ... [2019-01-14 02:14:12,616 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@572c71dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.01 02:14:12, skipping insertion in model container [2019-01-14 02:14:12,616 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-01-14 02:14:12,616 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 02:14:12" (2/3) ... [2019-01-14 02:14:12,617 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@572c71dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.01 02:14:12, skipping insertion in model container [2019-01-14 02:14:12,617 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-01-14 02:14:12,617 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 02:14:12" (3/3) ... [2019-01-14 02:14:12,619 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2019-01-14 02:14:12,686 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 02:14:12,688 INFO L374 BuchiCegarLoop]: Interprodecural is true [2019-01-14 02:14:12,688 INFO L375 BuchiCegarLoop]: Hoare is false [2019-01-14 02:14:12,688 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-01-14 02:14:12,689 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 02:14:12,689 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 02:14:12,689 INFO L379 BuchiCegarLoop]: Difference is false [2019-01-14 02:14:12,689 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 02:14:12,690 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-01-14 02:14:12,711 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-01-14 02:14:12,746 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-01-14 02:14:12,747 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-01-14 02:14:12,747 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-01-14 02:14:12,756 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-01-14 02:14:12,759 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-01-14 02:14:12,759 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2019-01-14 02:14:12,759 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-01-14 02:14:12,761 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-01-14 02:14:12,761 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-01-14 02:14:12,761 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-01-14 02:14:12,763 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-01-14 02:14:12,763 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-01-14 02:14:12,773 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2019-01-14 02:14:12,774 INFO L796 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2019-01-14 02:14:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2019-01-14 02:14:12,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:12,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:12,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:12,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:12,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2019-01-14 02:14:12,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:12,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:12,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:12,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:12,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2019-01-14 02:14:12,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:12,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:12,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:12,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:12,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:13,075 INFO L216 LassoAnalysis]: Preferences: [2019-01-14 02:14:13,076 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-01-14 02:14:13,077 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-01-14 02:14:13,077 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-01-14 02:14:13,077 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-01-14 02:14:13,077 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:13,077 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-01-14 02:14:13,078 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-01-14 02:14:13,078 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Loop [2019-01-14 02:14:13,079 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-01-14 02:14:13,079 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2019-01-14 02:14:13,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,384 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-01-14 02:14:13,392 INFO L300 LassoAnalysis]: Preprocessing complete. [2019-01-14 02:14:13,393 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-01-14 02:14:13,405 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:13,406 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:13,424 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:13,424 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-01-14 02:14:13,459 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:13,459 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:13,467 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:13,467 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:13,487 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:13,487 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:13,491 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:13,491 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:13,511 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:13,511 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:13,515 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:13,515 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:13,536 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:13,536 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:13,567 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-01-14 02:14:13,567 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:13,595 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:13,595 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=-1}, {g_#in~x=0}] Lambdas: [8, 1, 8] Nus: [0, 0] [2019-01-14 02:14:13,692 INFO L216 LassoAnalysis]: Preferences: [2019-01-14 02:14:13,692 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-01-14 02:14:13,692 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-01-14 02:14:13,692 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-01-14 02:14:13,692 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-01-14 02:14:13,692 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:13,693 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-01-14 02:14:13,693 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-01-14 02:14:13,693 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2019-01-14 02:14:13,693 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-01-14 02:14:13,693 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2019-01-14 02:14:13,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:13,911 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-01-14 02:14:14,289 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-01-14 02:14:14,366 INFO L300 LassoAnalysis]: Preprocessing complete. [2019-01-14 02:14:14,366 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-01-14 02:14:14,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,371 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:14,384 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:14,385 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,414 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,414 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:14,420 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:14,421 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,442 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,442 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:14,445 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:14,445 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,467 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,467 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:14,469 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:14,470 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,493 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,494 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:14,496 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:14,497 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,519 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,519 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:14,529 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:14,529 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,548 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:14,548 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:14,573 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-01-14 02:14:14,573 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:14,606 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-01-14 02:14:14,608 INFO L216 LassoAnalysis]: Preferences: [2019-01-14 02:14:14,608 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-01-14 02:14:14,608 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-01-14 02:14:14,608 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-01-14 02:14:14,608 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-01-14 02:14:14,608 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:14,608 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-01-14 02:14:14,609 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-01-14 02:14:14,609 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2019-01-14 02:14:14,609 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-01-14 02:14:14,609 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2019-01-14 02:14:14,611 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:14,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:15,084 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-01-14 02:14:15,087 INFO L300 LassoAnalysis]: Preprocessing complete. [2019-01-14 02:14:15,092 INFO L497 LassoAnalysis]: Using template 'affine'. [2019-01-14 02:14:15,093 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 [2019-01-14 02:14:15,095 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,095 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,095 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,095 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,096 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,097 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,097 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,101 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,101 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-01-14 02:14:15,102 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,102 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,102 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,103 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,103 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,103 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,103 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,105 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,106 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 [2019-01-14 02:14:15,106 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,106 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,107 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,107 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,107 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,107 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,108 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,109 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,110 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 [2019-01-14 02:14:15,110 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,110 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,110 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,111 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,111 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,111 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,112 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,113 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,114 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 [2019-01-14 02:14:15,114 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,114 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,115 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,115 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,115 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,115 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,116 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,117 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,117 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 [2019-01-14 02:14:15,118 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,118 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,118 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,118 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,118 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,119 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,119 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,120 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,121 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 [2019-01-14 02:14:15,121 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,122 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,122 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,122 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,122 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,123 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,123 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,124 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,124 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 [2019-01-14 02:14:15,125 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,125 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,125 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,125 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,126 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,126 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,126 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,128 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,128 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 [2019-01-14 02:14:15,129 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,129 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:15,129 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,129 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:15,130 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,130 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:15,130 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:15,132 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:15,132 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 [2019-01-14 02:14:15,133 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:15,133 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:15,133 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2019-01-14 02:14:15,133 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:15,143 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-01-14 02:14:15,143 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-01-14 02:14:15,298 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-01-14 02:14:15,349 INFO L443 ModelExtractionUtils]: Simplification made 7 calls to the SMT solver. [2019-01-14 02:14:15,349 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2019-01-14 02:14:15,354 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-01-14 02:14:15,364 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-01-14 02:14:15,365 INFO L518 LassoAnalysis]: Proved termination. [2019-01-14 02:14:15,365 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2019-01-14 02:14:15,375 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-01-14 02:14:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:15,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 02:14:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:15,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 02:14:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 02:14:15,673 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 [2019-01-14 02:14:15,674 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2019-01-14 02:14:15,935 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2019-01-14 02:14:15,936 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 [2019-01-14 02:14:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-01-14 02:14:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2019-01-14 02:14:15,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-01-14 02:14:15,941 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-01-14 02:14:15,941 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-01-14 02:14:15,941 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-01-14 02:14:15,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-01-14 02:14:15,942 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-01-14 02:14:15,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2019-01-14 02:14:15,948 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-01-14 02:14:15,955 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2019-01-14 02:14:15,956 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-01-14 02:14:15,956 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-01-14 02:14:15,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2019-01-14 02:14:15,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-01-14 02:14:15,959 INFO L706 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-01-14 02:14:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2019-01-14 02:14:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-01-14 02:14:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-14 02:14:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-01-14 02:14:15,987 INFO L729 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-01-14 02:14:15,987 INFO L609 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-01-14 02:14:15,987 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2019-01-14 02:14:15,987 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2019-01-14 02:14:15,988 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-01-14 02:14:15,989 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-01-14 02:14:15,989 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-01-14 02:14:15,990 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 02:14:15,990 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-01-14 02:14:15,990 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2019-01-14 02:14:15,990 INFO L796 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2019-01-14 02:14:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2019-01-14 02:14:15,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:15,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:15,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:15,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:15,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2019-01-14 02:14:16,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:16,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:16,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:16,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:16,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:16,014 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2019-01-14 02:14:16,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:16,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:16,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:16,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:16,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-01-14 02:14:16,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 02:14:16,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-14 02:14:16,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:16,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 02:14:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-01-14 02:14:16,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 02:14:16,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-01-14 02:14:16,420 INFO L216 LassoAnalysis]: Preferences: [2019-01-14 02:14:16,421 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-01-14 02:14:16,421 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-01-14 02:14:16,421 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-01-14 02:14:16,421 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-01-14 02:14:16,421 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:16,421 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-01-14 02:14:16,421 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-01-14 02:14:16,422 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2019-01-14 02:14:16,422 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-01-14 02:14:16,422 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2019-01-14 02:14:16,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:16,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:16,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:16,559 INFO L300 LassoAnalysis]: Preprocessing complete. [2019-01-14 02:14:16,559 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:16,563 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:16,563 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:16,588 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-01-14 02:14:16,588 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:17,799 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-01-14 02:14:17,801 INFO L216 LassoAnalysis]: Preferences: [2019-01-14 02:14:17,802 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-01-14 02:14:17,802 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-01-14 02:14:17,802 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-01-14 02:14:17,802 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-01-14 02:14:17,802 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:17,802 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-01-14 02:14:17,802 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-01-14 02:14:17,803 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2019-01-14 02:14:17,803 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-01-14 02:14:17,803 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2019-01-14 02:14:17,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:17,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:17,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:17,878 INFO L300 LassoAnalysis]: Preprocessing complete. [2019-01-14 02:14:17,879 INFO L497 LassoAnalysis]: Using template 'affine'. [2019-01-14 02:14:17,880 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 [2019-01-14 02:14:17,880 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:17,881 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:17,881 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:17,881 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:17,881 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:17,884 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:17,884 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:17,885 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-01-14 02:14:17,886 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 [2019-01-14 02:14:17,886 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2019-01-14 02:14:17,887 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-01-14 02:14:17,889 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2019-01-14 02:14:17,889 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2019-01-14 02:14:17,889 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2019-01-14 02:14:17,890 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-01-14 02:14:17,890 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-01-14 02:14:17,895 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-01-14 02:14:17,898 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-01-14 02:14:17,898 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2019-01-14 02:14:17,899 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-01-14 02:14:17,899 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-01-14 02:14:17,899 INFO L518 LassoAnalysis]: Proved termination. [2019-01-14 02:14:17,899 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2019-01-14 02:14:17,900 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-01-14 02:14:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:18,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 02:14:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:18,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 02:14:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 02:14:18,226 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-01-14 02:14:18,226 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2019-01-14 02:14:18,740 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2019-01-14 02:14:18,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2019-01-14 02:14:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-14 02:14:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-01-14 02:14:18,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2019-01-14 02:14:18,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-01-14 02:14:18,746 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2019-01-14 02:14:18,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-01-14 02:14:18,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2019-01-14 02:14:18,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-01-14 02:14:18,747 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2019-01-14 02:14:18,755 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-01-14 02:14:18,759 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2019-01-14 02:14:18,760 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2019-01-14 02:14:18,760 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2019-01-14 02:14:18,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2019-01-14 02:14:18,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-01-14 02:14:18,761 INFO L706 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2019-01-14 02:14:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2019-01-14 02:14:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-01-14 02:14:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-14 02:14:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-01-14 02:14:18,772 INFO L729 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-01-14 02:14:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-14 02:14:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-01-14 02:14:18,777 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2019-01-14 02:14:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 02:14:18,922 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-01-14 02:14:18,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-14 02:14:18,925 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2019-01-14 02:14:18,928 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-01-14 02:14:18,931 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2019-01-14 02:14:18,932 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-01-14 02:14:18,933 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2019-01-14 02:14:18,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2019-01-14 02:14:18,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-01-14 02:14:18,933 INFO L706 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-01-14 02:14:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2019-01-14 02:14:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-01-14 02:14:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-14 02:14:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-01-14 02:14:18,938 INFO L729 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-01-14 02:14:18,938 INFO L609 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-01-14 02:14:18,938 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2019-01-14 02:14:18,938 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2019-01-14 02:14:18,939 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-01-14 02:14:18,939 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-01-14 02:14:18,939 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-01-14 02:14:18,942 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 02:14:18,942 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-01-14 02:14:18,943 INFO L794 eck$LassoCheckResult]: Stem: 492#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 493#L20 assume !(main_~x~0 < 0); 490#L21 call main_#t~ret3 := g(main_~x~0);< 491#gENTRY ~x := #in~x; 488#L12 assume !(0 == ~x); 489#L15 call #t~ret0 := g(~x - 1);< 497#gENTRY ~x := #in~x; 498#L12 assume 0 == ~x;#res := 1; 506#gFINAL assume true; 504#gEXIT >#22#return; 486#L15-1 call #t~ret1 := g(1 + #t~ret0);< 509#gENTRY ~x := #in~x; 485#L12 assume !(0 == ~x); 487#L15 call #t~ret0 := g(~x - 1);< 503#gENTRY ~x := #in~x; 507#L12 assume !(0 == ~x); 500#L15 [2019-01-14 02:14:18,943 INFO L796 eck$LassoCheckResult]: Loop: 500#L15 call #t~ret0 := g(~x - 1);< 505#gENTRY ~x := #in~x; 508#L12 assume !(0 == ~x); 500#L15 [2019-01-14 02:14:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2019-01-14 02:14:18,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:18,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:18,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:18,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 02:14:18,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2019-01-14 02:14:18,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:18,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:18,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:18,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 02:14:18,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:18,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2019-01-14 02:14:18,966 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:18,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:18,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:18,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 02:14:18,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 02:14:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-14 02:14:19,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 02:14:19,145 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:19,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-14 02:14:19,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-01-14 02:14:19,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 02:14:19,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 02:14:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-14 02:14:19,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 02:14:19,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-01-14 02:14:19,297 INFO L216 LassoAnalysis]: Preferences: [2019-01-14 02:14:19,297 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-01-14 02:14:19,297 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-01-14 02:14:19,297 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-01-14 02:14:19,298 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-01-14 02:14:19,298 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:19,298 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-01-14 02:14:19,298 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-01-14 02:14:19,298 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration3_Loop [2019-01-14 02:14:19,298 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-01-14 02:14:19,299 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2019-01-14 02:14:19,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:19,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:19,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:19,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-01-14 02:14:19,384 INFO L300 LassoAnalysis]: Preprocessing complete. [2019-01-14 02:14:19,384 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-01-14 02:14:19,394 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:19,394 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:19,421 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-01-14 02:14:19,421 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:19,590 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:19,590 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8, g_~x=-8} Honda state: {g_#in~x=-8, g_~x=-8} Generalized eigenvectors: [{g_#in~x=0, g_~x=0}, {g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}] Lambdas: [8, 1, 3] Nus: [0, 0] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:19,610 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:19,610 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:19,613 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:19,613 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:19,634 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:19,634 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:19,642 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:19,642 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 02:14:19,662 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-01-14 02:14:19,662 INFO L163 nArgumentSynthesizer]: Using integer mode. [2019-01-14 02:14:19,664 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2019-01-14 02:14:19,665 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-01-14 02:14:19,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-14 02:14:19,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-01-14 02:14:19,684 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2019-01-14 02:14:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 02:14:19,948 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-01-14 02:14:19,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-14 02:14:19,950 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2019-01-14 02:14:19,952 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-01-14 02:14:19,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2019-01-14 02:14:19,953 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-01-14 02:14:19,953 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-01-14 02:14:19,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2019-01-14 02:14:19,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-01-14 02:14:19,954 INFO L706 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-01-14 02:14:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2019-01-14 02:14:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-01-14 02:14:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-14 02:14:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-01-14 02:14:19,956 INFO L729 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-01-14 02:14:19,956 INFO L609 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-01-14 02:14:19,956 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2019-01-14 02:14:19,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2019-01-14 02:14:19,957 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-01-14 02:14:19,957 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-01-14 02:14:19,957 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-01-14 02:14:19,958 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 02:14:19,958 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2019-01-14 02:14:19,958 INFO L794 eck$LassoCheckResult]: Stem: 625#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 626#L20 assume !(main_~x~0 < 0); 618#L21 call main_#t~ret3 := g(main_~x~0);< 619#gENTRY ~x := #in~x; 623#L12 assume !(0 == ~x); 624#L15 call #t~ret0 := g(~x - 1);< 628#gENTRY ~x := #in~x; 629#L12 assume 0 == ~x;#res := 1; 636#gFINAL assume true; 634#gEXIT >#22#return; 621#L15-1 [2019-01-14 02:14:19,958 INFO L796 eck$LassoCheckResult]: Loop: 621#L15-1 call #t~ret1 := g(1 + #t~ret0);< 627#gENTRY ~x := #in~x; 620#L12 assume !(0 == ~x); 622#L15 call #t~ret0 := g(~x - 1);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 631#L15 call #t~ret0 := g(~x - 1);< 635#gENTRY ~x := #in~x; 638#L12 assume 0 == ~x;#res := 1; 630#gFINAL assume true; 632#gEXIT >#22#return; 621#L15-1 [2019-01-14 02:14:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2019-01-14 02:14:19,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:19,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:19,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:19,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 02:14:19,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2019-01-14 02:14:19,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:19,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:19,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:19,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 02:14:19,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 02:14:19,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2019-01-14 02:14:19,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 02:14:19,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 02:14:19,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:19,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 02:14:19,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 02:14:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 02:14:20,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.01 02:14:20 BoogieIcfgContainer [2019-01-14 02:14:20,356 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-01-14 02:14:20,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 02:14:20,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 02:14:20,356 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 02:14:20,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 02:14:12" (3/4) ... [2019-01-14 02:14:20,360 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2019-01-14 02:14:20,410 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 02:14:20,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 02:14:20,411 INFO L168 Benchmark]: Toolchain (without parser) took 8380.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.7 MB). Free memory was 951.3 MB in the beginning and 1.0 GB in the end (delta: -96.9 MB). Peak memory consumption was 101.8 MB. Max. memory is 11.5 GB. [2019-01-14 02:14:20,418 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 02:14:20,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.45 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-14 02:14:20,421 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.64 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 02:14:20,422 INFO L168 Benchmark]: Boogie Preprocessor took 13.47 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 02:14:20,422 INFO L168 Benchmark]: RCFGBuilder took 299.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -165.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-01-14 02:14:20,423 INFO L168 Benchmark]: BuchiAutomizer took 7744.83 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.2 MB). Peak memory consumption was 134.8 MB. Max. memory is 11.5 GB. [2019-01-14 02:14:20,423 INFO L168 Benchmark]: Witness Printer took 53.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 02:14:20,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 231.45 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 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 32.64 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.47 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 299.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -165.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 7744.83 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.2 MB). Peak memory consumption was 134.8 MB. Max. memory is 11.5 GB. * Witness Printer took 53.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.6s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 5.6s. Construction of modules took 0.4s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 67 SDslu, 97 SDs, 0 SdLazy, 225 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 232ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.7s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@18a24ee4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@699a7ee2=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4e0c5e81=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5bc41a76=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...