./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 69d872c0500c15c11d149393bc821769e86dd3ec 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:21:58,781 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:21:58,782 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:21:58,790 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:21:58,791 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:21:58,791 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:21:58,792 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:21:58,793 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:21:58,794 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:21:58,795 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:21:58,796 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:21:58,796 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:21:58,797 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:21:58,797 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:21:58,798 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:21:58,798 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:21:58,799 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:21:58,800 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:21:58,802 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:21:58,803 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:21:58,803 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:21:58,804 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:21:58,806 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:21:58,806 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:21:58,806 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:21:58,807 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:21:58,807 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:21:58,808 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:21:58,808 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:21:58,809 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:21:58,809 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:21:58,810 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:21:58,810 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:21:58,810 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:21:58,811 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:21:58,811 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:21:58,811 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-28 11:21:58,823 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:21:58,823 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:21:58,824 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:21:58,824 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:21:58,824 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:21:58,824 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 11:21:58,824 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 11:21:58,825 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 11:21:58,825 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 11:21:58,825 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 11:21:58,825 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 11:21:58,825 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:21:58,825 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 11:21:58,825 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 11:21:58,826 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:21:58,827 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 11:21:58,827 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:21:58,827 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:21:58,827 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 11:21:58,827 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:21:58,827 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:21:58,828 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 11:21:58,828 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 11:21:58,828 INFO L133 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d872c0500c15c11d149393bc821769e86dd3ec [2018-11-28 11:21:58,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:21:58,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:21:58,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:21:58,864 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:21:58,864 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:21:58,864 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/../../sv-benchmarks/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c [2018-11-28 11:21:58,910 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/data/f83efdade/50b558ca01954e279dbc78ad1fdc97e2/FLAGd7ab6e399 [2018-11-28 11:21:59,292 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:21:59,293 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/sv-benchmarks/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c [2018-11-28 11:21:59,296 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/data/f83efdade/50b558ca01954e279dbc78ad1fdc97e2/FLAGd7ab6e399 [2018-11-28 11:21:59,307 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/data/f83efdade/50b558ca01954e279dbc78ad1fdc97e2 [2018-11-28 11:21:59,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:21:59,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:21:59,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:21:59,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:21:59,312 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:21:59,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5d7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59, skipping insertion in model container [2018-11-28 11:21:59,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:21:59,330 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:21:59,427 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:21:59,429 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:21:59,439 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:21:59,447 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:21:59,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59 WrapperNode [2018-11-28 11:21:59,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:21:59,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:21:59,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:21:59,448 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:21:59,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:21:59,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:21:59,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:21:59,468 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:21:59,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... [2018-11-28 11:21:59,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:21:59,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:21:59,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:21:59,479 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:21:59,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:21:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:21:59,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:21:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-11-28 11:21:59,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-11-28 11:21:59,656 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:21:59,657 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-28 11:21:59,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:21:59 BoogieIcfgContainer [2018-11-28 11:21:59,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:21:59,657 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 11:21:59,658 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 11:21:59,661 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 11:21:59,661 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:21:59,661 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 11:21:59" (1/3) ... [2018-11-28 11:21:59,662 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47068ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:21:59, skipping insertion in model container [2018-11-28 11:21:59,662 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:21:59,662 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:21:59" (2/3) ... [2018-11-28 11:21:59,663 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47068ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:21:59, skipping insertion in model container [2018-11-28 11:21:59,663 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:21:59,663 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:21:59" (3/3) ... [2018-11-28 11:21:59,664 INFO L375 chiAutomizerObserver]: Analyzing ICFG Ackermann01_true-termination_true-no-overflow.c [2018-11-28 11:21:59,703 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:21:59,703 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 11:21:59,703 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 11:21:59,703 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 11:21:59,703 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:21:59,703 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:21:59,703 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 11:21:59,704 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:21:59,704 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 11:21:59,712 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-11-28 11:21:59,727 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 11:21:59,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:21:59,728 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:21:59,735 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-28 11:21:59,735 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:21:59,735 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 11:21:59,735 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-11-28 11:21:59,737 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 11:21:59,737 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:21:59,737 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:21:59,738 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-28 11:21:59,738 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:21:59,746 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3#L27true assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 12#L31true assume !(main_~n~0 < 0 || main_~n~0 > 23); 17#L34true call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 9#ackermannENTRYtrue [2018-11-28 11:21:59,746 INFO L796 eck$LassoCheckResult]: Loop: 9#ackermannENTRYtrue ~m := #in~m;~n := #in~n; 16#L15true assume !(0 == ~m); 10#L18true assume !(0 == ~n); 5#L21true call #t~ret1 := ackermann(~m, ~n - 1);< 9#ackermannENTRYtrue [2018-11-28 11:21:59,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:21:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash 959458, now seen corresponding path program 1 times [2018-11-28 11:21:59,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:21:59,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:21:59,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:21:59,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:21:59,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:21:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:21:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:21:59,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:21:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 1 times [2018-11-28 11:21:59,824 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:21:59,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:21:59,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:21:59,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:21:59,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:21:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:21:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:21:59,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:21:59,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091631, now seen corresponding path program 1 times [2018-11-28 11:21:59,832 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:21:59,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:21:59,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:21:59,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:21:59,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:21:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:21:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:21:59,919 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:21:59,920 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:21:59,920 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:21:59,920 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:21:59,921 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:21:59,921 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:21:59,921 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:21:59,921 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:21:59,921 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration1_Loop [2018-11-28 11:21:59,921 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:21:59,921 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:21:59,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,944 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:21:59,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,072 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:00,072 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,076 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,076 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,083 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,083 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,107 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,108 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,110 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,110 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,134 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,134 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,137 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,137 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,154 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,154 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,156 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,156 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,178 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,178 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,180 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,181 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,195 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,195 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,197 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,197 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,212 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,212 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,229 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:00,229 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,240 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,240 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=-1} Honda state: {ackermann_#in~n=-1} Generalized eigenvectors: [{ackermann_#in~n=0}, {ackermann_#in~n=0}, {ackermann_#in~n=-1}] Lambdas: [0, 0, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,256 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,256 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,259 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,259 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7} Honda state: {ackermann_#in~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 11:22:00,308 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:00,308 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:00,308 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:00,308 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:00,308 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:00,308 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,308 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:00,308 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:00,309 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration1_Lasso [2018-11-28 11:22:00,309 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:00,309 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:00,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,463 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:00,463 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,473 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,473 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,475 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,475 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,491 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,491 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,496 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,496 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,513 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,513 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,520 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,521 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,537 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,537 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,540 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:00,540 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,558 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:00,558 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,589 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:00,589 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:00,616 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:22:00,617 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:00,617 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:00,617 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:00,617 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:00,618 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:22:00,618 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:00,618 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:00,618 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:00,618 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration1_Lasso [2018-11-28 11:22:00,618 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:00,618 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:00,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:00,762 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:00,767 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:22:00,768 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:00,769 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:00,770 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:00,770 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:00,770 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:00,770 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:00,772 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:00,772 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:00,775 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:00,775 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:00,776 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:00,776 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:00,776 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:00,776 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:00,776 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:00,777 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:00,777 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:00,778 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:00,778 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:00,778 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:00,778 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:00,779 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:00,779 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:00,779 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:00,779 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:00,779 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:00,780 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:00,780 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:00,781 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:00,781 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:00,781 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:00,781 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:00,781 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:00,782 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:00,782 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:00,782 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:00,783 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:00,783 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:00,783 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:00,783 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 11:22:00,783 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:00,789 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 11:22:00,789 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 11:22:00,857 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:22:00,876 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2018-11-28 11:22:00,876 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2018-11-28 11:22:00,878 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:22:00,881 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 11:22:00,882 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:22:00,882 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2018-11-28 11:22:00,888 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 11:22:00,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:00,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:00,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:01,010 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 11:22:01,011 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 5 states. [2018-11-28 11:22:01,114 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 5 states. Result 49 states and 64 transitions. Complement of second has 13 states. [2018-11-28 11:22:01,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 11:22:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2018-11-28 11:22:01,118 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2018-11-28 11:22:01,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:01,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2018-11-28 11:22:01,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:01,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2018-11-28 11:22:01,120 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:01,120 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 64 transitions. [2018-11-28 11:22:01,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 11:22:01,130 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 30 states and 41 transitions. [2018-11-28 11:22:01,131 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2018-11-28 11:22:01,132 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2018-11-28 11:22:01,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 41 transitions. [2018-11-28 11:22:01,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:01,133 INFO L705 BuchiCegarLoop]: Abstraction has 30 states and 41 transitions. [2018-11-28 11:22:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 41 transitions. [2018-11-28 11:22:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-11-28 11:22:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 11:22:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2018-11-28 11:22:01,154 INFO L728 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2018-11-28 11:22:01,154 INFO L608 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2018-11-28 11:22:01,154 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 11:22:01,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 34 transitions. [2018-11-28 11:22:01,155 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 11:22:01,155 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:01,155 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:01,155 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:01,155 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:22:01,156 INFO L794 eck$LassoCheckResult]: Stem: 159#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 140#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 141#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 148#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 152#ackermannENTRY ~m := #in~m;~n := #in~n; 154#L15 assume !(0 == ~m); 165#L18 assume 0 == ~n; 143#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2018-11-28 11:22:01,156 INFO L796 eck$LassoCheckResult]: Loop: 146#ackermannENTRY ~m := #in~m;~n := #in~n; 164#L15 assume !(0 == ~m); 162#L18 assume 0 == ~n; 145#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2018-11-28 11:22:01,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 1 times [2018-11-28 11:22:01,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:01,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:01,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:01,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1666415, now seen corresponding path program 1 times [2018-11-28 11:22:01,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:01,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:01,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:01,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1185130174, now seen corresponding path program 2 times [2018-11-28 11:22:01,169 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:01,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:01,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:01,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:01,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:22:01,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 11:22:01,254 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:01,254 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:01,254 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:01,254 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:01,254 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:01,254 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,254 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:01,254 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:01,254 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration2_Loop [2018-11-28 11:22:01,254 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:01,254 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:01,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,260 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,309 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:01,309 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,311 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,311 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,314 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,314 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,329 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,329 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,331 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,331 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,346 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,346 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,348 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,348 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,367 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,367 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,369 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,370 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,385 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,385 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,387 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,387 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,403 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,420 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:01,421 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,424 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:22:01,438 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:01,438 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:01,438 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:01,438 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:01,438 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:22:01,438 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,438 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:01,439 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:01,439 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration2_Loop [2018-11-28 11:22:01,439 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:01,439 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:01,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,499 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:01,499 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:22:01,499 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,500 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,500 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,500 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,500 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,500 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,501 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,501 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,502 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:01,502 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,502 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,502 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,502 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,503 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,503 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,503 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,503 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,503 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:01,503 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,504 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,504 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,504 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,504 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,504 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,504 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,504 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,505 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:01,505 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,505 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,505 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,505 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,505 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,505 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,505 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,505 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,506 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:01,506 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,506 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,506 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,506 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,506 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,506 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,507 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,507 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,507 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:01,507 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,507 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,508 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,508 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,508 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,508 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,508 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,508 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,509 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:01,509 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:01,509 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:01,509 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:01,509 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:01,510 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:01,510 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:01,510 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:01,510 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:01,512 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:22:01,513 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 11:22:01,513 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 11:22:01,513 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:22:01,514 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:22:01,514 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:22:01,514 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = -2*ackermann_#in~n + 1 Supporting invariants [] [2018-11-28 11:22:01,514 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:22:01,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:01,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:01,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:01,577 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-28 11:22:01,577 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10 Second operand 4 states. [2018-11-28 11:22:01,649 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10. Second operand 4 states. Result 61 states and 85 transitions. Complement of second has 13 states. [2018-11-28 11:22:01,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 11:22:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2018-11-28 11:22:01,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 4 letters. [2018-11-28 11:22:01,651 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:01,651 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 12 letters. Loop has 4 letters. [2018-11-28 11:22:01,651 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:01,651 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 8 letters. [2018-11-28 11:22:01,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:01,652 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 85 transitions. [2018-11-28 11:22:01,654 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-28 11:22:01,655 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 53 states and 77 transitions. [2018-11-28 11:22:01,655 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2018-11-28 11:22:01,655 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-11-28 11:22:01,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 77 transitions. [2018-11-28 11:22:01,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:01,655 INFO L705 BuchiCegarLoop]: Abstraction has 53 states and 77 transitions. [2018-11-28 11:22:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 77 transitions. [2018-11-28 11:22:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2018-11-28 11:22:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-28 11:22:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2018-11-28 11:22:01,661 INFO L728 BuchiCegarLoop]: Abstraction has 47 states and 67 transitions. [2018-11-28 11:22:01,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 11:22:01,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 11:22:01,664 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 4 states. [2018-11-28 11:22:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:01,701 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-11-28 11:22:01,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 11:22:01,702 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 68 transitions. [2018-11-28 11:22:01,703 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-28 11:22:01,704 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 48 states and 66 transitions. [2018-11-28 11:22:01,705 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2018-11-28 11:22:01,705 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2018-11-28 11:22:01,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 66 transitions. [2018-11-28 11:22:01,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:01,705 INFO L705 BuchiCegarLoop]: Abstraction has 48 states and 66 transitions. [2018-11-28 11:22:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 66 transitions. [2018-11-28 11:22:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2018-11-28 11:22:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 11:22:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2018-11-28 11:22:01,709 INFO L728 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2018-11-28 11:22:01,709 INFO L608 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2018-11-28 11:22:01,709 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 11:22:01,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 58 transitions. [2018-11-28 11:22:01,710 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-28 11:22:01,710 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:01,710 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:01,710 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:01,710 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:01,711 INFO L794 eck$LassoCheckResult]: Stem: 422#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 398#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 399#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 406#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 425#ackermannENTRY ~m := #in~m;~n := #in~n; 429#L15 assume !(0 == ~m); 428#L18 assume 0 == ~n; 412#L19 call #t~ret0 := ackermann(~m - 1, 1);< 413#ackermannENTRY [2018-11-28 11:22:01,711 INFO L796 eck$LassoCheckResult]: Loop: 413#ackermannENTRY ~m := #in~m;~n := #in~n; 415#L15 assume !(0 == ~m); 418#L18 assume !(0 == ~n); 402#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 404#ackermannENTRY ~m := #in~m;~n := #in~n; 434#L15 assume !(0 == ~m); 435#L18 assume 0 == ~n; 414#L19 call #t~ret0 := ackermann(~m - 1, 1);< 413#ackermannENTRY [2018-11-28 11:22:01,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 3 times [2018-11-28 11:22:01,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:01,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:01,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:01,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 1 times [2018-11-28 11:22:01,718 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:01,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:01,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:01,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1880893067, now seen corresponding path program 1 times [2018-11-28 11:22:01,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:01,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:01,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:01,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:01,829 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:01,829 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:01,829 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:01,829 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:01,829 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:01,829 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,829 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:01,829 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:01,829 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration3_Loop [2018-11-28 11:22:01,829 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:01,829 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:01,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:01,873 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:01,873 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,876 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,876 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,877 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,878 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,892 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,893 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,894 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,894 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,910 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,910 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,911 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,912 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,927 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,927 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,929 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,929 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,944 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,944 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,946 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,946 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,961 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,961 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,963 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,963 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:01,980 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:01,980 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:01,982 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:01,982 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,004 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,004 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,021 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:02,021 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,030 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,031 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] [2018-11-28 11:22:02,101 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:02,101 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:02,101 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:02,101 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:02,101 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:02,101 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,101 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:02,101 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:02,101 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration3_Lasso [2018-11-28 11:22:02,101 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:02,101 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:02,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,172 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:02,172 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,176 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,176 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,178 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,178 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,193 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,193 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,195 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,195 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,210 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,210 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,212 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,212 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=0} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 36 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,227 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,227 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,229 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,229 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet3=0} Honda state: {ULTIMATE.start_main_#t~nondet3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,244 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,244 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,246 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,246 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,261 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,261 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,263 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,263 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,277 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,277 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,279 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,279 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,293 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,294 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,295 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,295 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,310 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,310 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,312 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,312 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,327 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,327 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,332 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,332 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 /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,351 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,351 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,352 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,352 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~n~0=0} Honda state: {ULTIMATE.start_main_~n~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,367 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,367 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,372 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,372 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,387 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,387 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,388 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,389 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~result~0=0} Honda state: {ULTIMATE.start_main_~result~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,403 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:02,405 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,419 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:02,419 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,435 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:02,435 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:02,451 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:22:02,452 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:02,452 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:02,452 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:02,452 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:02,452 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:22:02,452 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,452 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:02,452 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:02,452 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration3_Lasso [2018-11-28 11:22:02,452 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:02,452 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:02,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,530 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:02,530 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:22:02,530 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,531 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,531 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,531 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,531 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,531 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,531 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,531 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,532 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,532 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,533 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,533 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,533 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,533 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,533 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,533 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,533 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,534 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,534 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,534 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,534 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,534 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,534 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,535 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 11:22:02,535 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 11:22:02,540 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,540 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,541 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,541 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,541 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,541 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,541 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,541 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,541 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,542 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,542 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,542 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,542 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,543 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,543 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,543 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,543 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,543 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,543 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,544 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,544 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,544 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,544 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,544 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,544 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,545 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,545 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,545 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,545 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,546 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,546 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,546 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,546 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,546 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,546 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,546 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,547 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,547 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,547 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,547 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,547 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,548 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,548 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,548 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,548 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,548 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,549 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,549 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,549 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,549 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,549 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,549 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,549 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,550 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,550 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,550 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,550 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,551 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,551 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,551 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,551 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,551 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,551 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,552 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,552 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,552 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,552 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,552 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,552 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,552 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,553 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,553 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,553 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,554 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,554 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,554 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:02,554 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,554 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:02,554 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,554 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:02,555 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:02,555 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:02,555 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:02,556 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:02,556 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:02,556 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 11:22:02,556 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:02,558 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 11:22:02,558 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 11:22:02,575 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:22:02,594 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-11-28 11:22:02,594 INFO L444 ModelExtractionUtils]: 3 out of 11 variables were initially zero. Simplification set additionally 5 variables to zero. [2018-11-28 11:22:02,594 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:22:02,597 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 11:22:02,598 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:22:02,598 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~m) = 1*ackermann_#in~m Supporting invariants [1*ackermann_#in~m >= 0] [2018-11-28 11:22:02,610 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 11:22:02,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:02,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:02,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 11:22:02,708 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.5 stem predicates 4 loop predicates [2018-11-28 11:22:02,709 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19 Second operand 9 states. [2018-11-28 11:22:02,859 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19. Second operand 9 states. Result 139 states and 195 transitions. Complement of second has 32 states. [2018-11-28 11:22:02,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 5 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-28 11:22:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2018-11-28 11:22:02,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 8 letters. [2018-11-28 11:22:02,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:02,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 16 letters. Loop has 8 letters. [2018-11-28 11:22:02,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:02,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 16 letters. [2018-11-28 11:22:02,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:02,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 139 states and 195 transitions. [2018-11-28 11:22:02,866 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2018-11-28 11:22:02,869 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 139 states to 85 states and 119 transitions. [2018-11-28 11:22:02,869 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2018-11-28 11:22:02,870 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2018-11-28 11:22:02,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 119 transitions. [2018-11-28 11:22:02,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:02,870 INFO L705 BuchiCegarLoop]: Abstraction has 85 states and 119 transitions. [2018-11-28 11:22:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 119 transitions. [2018-11-28 11:22:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2018-11-28 11:22:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 11:22:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2018-11-28 11:22:02,879 INFO L728 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2018-11-28 11:22:02,879 INFO L608 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2018-11-28 11:22:02,880 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 11:22:02,880 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 69 states and 98 transitions. [2018-11-28 11:22:02,883 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2018-11-28 11:22:02,883 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:02,883 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:02,884 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:02,884 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:22:02,884 INFO L794 eck$LassoCheckResult]: Stem: 732#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 701#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 702#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 712#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 733#ackermannENTRY ~m := #in~m;~n := #in~n; 748#L15 assume !(0 == ~m); 747#L18 assume 0 == ~n; 706#L19 call #t~ret0 := ackermann(~m - 1, 1);< 714#ackermannENTRY ~m := #in~m;~n := #in~n; 745#L15 assume !(0 == ~m); 730#L18 [2018-11-28 11:22:02,884 INFO L796 eck$LassoCheckResult]: Loop: 730#L18 assume !(0 == ~n); 703#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 704#ackermannENTRY ~m := #in~m;~n := #in~n; 722#L15 assume !(0 == ~m); 730#L18 [2018-11-28 11:22:02,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:02,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1290385452, now seen corresponding path program 4 times [2018-11-28 11:22:02,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:02,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:02,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:02,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:02,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:02,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1978510, now seen corresponding path program 2 times [2018-11-28 11:22:02,892 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:02,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:02,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:02,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:02,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:02,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash 743855841, now seen corresponding path program 2 times [2018-11-28 11:22:02,899 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:02,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:02,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:02,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:02,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:02,950 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:02,950 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:02,950 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:02,950 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:02,951 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:02,951 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:02,951 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:02,951 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:02,951 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration4_Loop [2018-11-28 11:22:02,951 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:02,951 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:02,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,967 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:02,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,055 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:03,056 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,065 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,066 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,068 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,069 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,097 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,097 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,100 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,100 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 51 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,126 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,126 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,174 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:03,174 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,443 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,443 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=-6, ackermann_#in~n=-3} Honda state: {ackermann_~n=-6, ackermann_#in~n=-3} Generalized eigenvectors: [{ackermann_~n=0, ackermann_#in~n=5}, {ackermann_~n=0, ackermann_#in~n=-8}, {ackermann_~n=-1, ackermann_#in~n=-1}] Lambdas: [0, 0, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,459 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,459 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,461 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,461 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,476 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,476 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,477 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,478 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,492 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,492 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,496 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,496 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8, ackermann_~m=-8} Honda state: {ackermann_#in~m=-8, ackermann_~m=-8} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 11:22:03,619 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:03,619 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:03,619 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:03,619 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:03,619 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:03,619 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,620 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:03,620 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:03,620 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration4_Lasso [2018-11-28 11:22:03,620 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:03,620 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:03,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:03,717 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:03,717 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,719 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,719 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,721 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,721 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,736 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,736 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,738 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,738 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 58 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,753 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,753 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,755 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,755 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,770 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,770 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,772 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,772 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~n~0=0} Honda state: {ULTIMATE.start_main_~n~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,787 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,787 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,789 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,789 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret6=0} Honda state: {ULTIMATE.start_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 61 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,806 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,806 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,807 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,808 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 62 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,823 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,823 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,825 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,825 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 63 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,840 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,840 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,842 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,842 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 64 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 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,857 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,857 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,860 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,860 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=0, ackermann_~m=0} Honda state: {ackermann_#in~m=2, ackermann_~m=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,875 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,875 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:03,877 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:03,877 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 /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 66 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,892 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:03,892 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 67 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:03,908 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:03,909 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,025 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:22:04,026 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:04,027 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:04,027 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:04,027 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:04,027 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:22:04,027 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,027 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:04,027 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:04,027 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration4_Lasso [2018-11-28 11:22:04,027 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:04,027 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:04,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,029 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,030 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,127 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:04,128 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:22:04,128 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 [2018-11-28 11:22:04,128 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,128 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,129 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,129 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,129 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,129 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,129 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,130 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,130 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,130 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,130 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,130 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,130 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,130 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,130 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,130 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,131 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,131 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,131 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,131 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,131 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,131 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,131 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,132 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,132 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,136 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,137 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,137 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,137 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,137 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,137 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,137 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,138 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,138 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,138 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,138 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,139 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,139 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,139 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,139 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,139 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,139 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,139 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,140 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,140 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,140 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,140 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,141 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,141 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,141 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,141 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,141 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,142 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,142 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,142 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,142 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,142 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 11:22:04,142 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,145 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 11:22:04,145 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 11:22:04,170 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,170 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,171 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,171 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,171 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,171 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,171 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,172 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,172 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,172 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,172 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,173 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,173 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:04,173 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,173 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:04,173 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,173 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:04,173 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:04,174 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:04,174 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:04,174 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:04,174 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:04,174 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 11:22:04,174 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:04,189 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 11:22:04,189 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 11:22:04,216 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:22:04,230 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2018-11-28 11:22:04,230 INFO L444 ModelExtractionUtils]: 11 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-11-28 11:22:04,230 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:22:04,231 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 11:22:04,231 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:22:04,232 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~n) = 1*ackermann_~n Supporting invariants [1*ackermann_~n >= 0] [2018-11-28 11:22:04,240 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 11:22:04,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:04,374 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2018-11-28 11:22:04,374 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-11-28 11:22:04,396 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 70 states and 99 transitions. Complement of second has 6 states. [2018-11-28 11:22:04,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 11:22:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-11-28 11:22:04,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-28 11:22:04,398 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:04,398 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:22:04,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:04,480 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.3 stem predicates 4 loop predicates [2018-11-28 11:22:04,480 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-11-28 11:22:04,504 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 70 states and 99 transitions. Complement of second has 6 states. [2018-11-28 11:22:04,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 11:22:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-11-28 11:22:04,508 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-28 11:22:04,508 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:04,508 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:22:04,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:04,572 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2018-11-28 11:22:04,572 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-11-28 11:22:04,636 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 141 states and 191 transitions. Complement of second has 38 states. [2018-11-28 11:22:04,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 3 stem states 3 non-accepting loop states 2 accepting loop states [2018-11-28 11:22:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 11:22:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-11-28 11:22:04,637 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-28 11:22:04,637 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:04,637 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 14 letters. Loop has 4 letters. [2018-11-28 11:22:04,637 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:04,637 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 8 letters. [2018-11-28 11:22:04,638 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:04,638 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 141 states and 191 transitions. [2018-11-28 11:22:04,641 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2018-11-28 11:22:04,643 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 141 states to 98 states and 142 transitions. [2018-11-28 11:22:04,643 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-11-28 11:22:04,643 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2018-11-28 11:22:04,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 142 transitions. [2018-11-28 11:22:04,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:04,644 INFO L705 BuchiCegarLoop]: Abstraction has 98 states and 142 transitions. [2018-11-28 11:22:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 142 transitions. [2018-11-28 11:22:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2018-11-28 11:22:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-28 11:22:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2018-11-28 11:22:04,651 INFO L728 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-11-28 11:22:04,652 INFO L608 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-11-28 11:22:04,652 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-28 11:22:04,652 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 138 transitions. [2018-11-28 11:22:04,653 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2018-11-28 11:22:04,653 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:04,653 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:04,654 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:04,654 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:22:04,654 INFO L794 eck$LassoCheckResult]: Stem: 1312#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1278#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1279#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1287#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1316#ackermannENTRY ~m := #in~m;~n := #in~n; 1343#L15 assume !(0 == ~m); 1372#L18 assume !(0 == ~n); 1285#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1286#ackermannENTRY ~m := #in~m;~n := #in~n; 1297#L15 assume 0 == ~m;#res := 1 + ~n; 1313#ackermannFINAL assume true; 1317#ackermannEXIT >#44#return; 1281#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1283#ackermannENTRY [2018-11-28 11:22:04,654 INFO L796 eck$LassoCheckResult]: Loop: 1283#ackermannENTRY ~m := #in~m;~n := #in~n; 1295#L15 assume !(0 == ~m); 1369#L18 assume !(0 == ~n); 1280#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1283#ackermannENTRY [2018-11-28 11:22:04,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash 804076149, now seen corresponding path program 1 times [2018-11-28 11:22:04,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:04,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:04,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:04,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 11:22:04,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:22:04,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:22:04,676 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:22:04,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 3 times [2018-11-28 11:22:04,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:04,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:04,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:04,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:04,715 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:04,715 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:04,715 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:04,715 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:04,715 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:04,715 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,715 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:04,715 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:04,715 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration5_Loop [2018-11-28 11:22:04,715 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:04,715 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:04,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:04,754 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:04,754 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 68 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,755 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,755 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,760 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,760 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 69 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,776 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,777 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,778 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,778 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 70 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,793 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,793 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,795 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,795 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 71 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,810 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,810 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,811 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,812 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 72 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,827 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,827 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 73 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,843 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:04,843 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,851 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,851 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=-1} Honda state: {ackermann_#in~n=-1} Generalized eigenvectors: [{ackermann_#in~n=0}, {ackermann_#in~n=0}, {ackermann_#in~n=-1}] Lambdas: [0, 0, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 74 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,866 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,866 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,869 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,869 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7} Honda state: {ackermann_#in~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 75 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,884 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,884 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,886 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,887 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 76 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:04,901 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:04,901 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:04,903 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:04,903 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 11:22:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:22:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:22:04,917 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. cyclomatic complexity: 46 Second operand 5 states. [2018-11-28 11:22:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:04,945 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2018-11-28 11:22:04,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:22:04,946 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 122 transitions. [2018-11-28 11:22:04,947 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2018-11-28 11:22:04,949 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 85 states and 116 transitions. [2018-11-28 11:22:04,949 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2018-11-28 11:22:04,949 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2018-11-28 11:22:04,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 116 transitions. [2018-11-28 11:22:04,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:04,950 INFO L705 BuchiCegarLoop]: Abstraction has 85 states and 116 transitions. [2018-11-28 11:22:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 116 transitions. [2018-11-28 11:22:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2018-11-28 11:22:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-28 11:22:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2018-11-28 11:22:04,956 INFO L728 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2018-11-28 11:22:04,956 INFO L608 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2018-11-28 11:22:04,956 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-28 11:22:04,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 82 states and 112 transitions. [2018-11-28 11:22:04,957 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2018-11-28 11:22:04,957 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:04,957 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:04,958 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:04,959 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:04,959 INFO L794 eck$LassoCheckResult]: Stem: 1508#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1477#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1478#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1489#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1511#ackermannENTRY ~m := #in~m;~n := #in~n; 1529#L15 assume !(0 == ~m); 1526#L18 assume 0 == ~n; 1491#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1492#ackermannENTRY ~m := #in~m;~n := #in~n; 1500#L15 assume !(0 == ~m); 1557#L18 assume !(0 == ~n); 1494#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1533#ackermannENTRY ~m := #in~m;~n := #in~n; 1555#L15 assume !(0 == ~m); 1517#L18 assume 0 == ~n; 1493#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1495#ackermannENTRY ~m := #in~m;~n := #in~n; 1527#L15 assume 0 == ~m;#res := 1 + ~n; 1524#ackermannFINAL assume true; 1519#ackermannEXIT >#42#return; 1521#L19-1 #res := #t~ret0;havoc #t~ret0; 1535#ackermannFINAL assume true; 1532#ackermannEXIT >#44#return; 1516#L21-1 [2018-11-28 11:22:04,959 INFO L796 eck$LassoCheckResult]: Loop: 1516#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1531#ackermannENTRY ~m := #in~m;~n := #in~n; 1536#L15 assume !(0 == ~m); 1515#L18 assume 0 == ~n; 1504#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1523#ackermannENTRY ~m := #in~m;~n := #in~n; 1546#L15 assume !(0 == ~m); 1502#L18 assume !(0 == ~n); 1505#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1553#ackermannENTRY ~m := #in~m;~n := #in~n; 1549#L15 assume !(0 == ~m); 1547#L18 assume 0 == ~n; 1504#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1523#ackermannENTRY ~m := #in~m;~n := #in~n; 1546#L15 assume 0 == ~m;#res := 1 + ~n; 1545#ackermannFINAL assume true; 1537#ackermannEXIT >#42#return; 1521#L19-1 #res := #t~ret0;havoc #t~ret0; 1535#ackermannFINAL assume true; 1532#ackermannEXIT >#44#return; 1516#L21-1 [2018-11-28 11:22:04,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1914958677, now seen corresponding path program 1 times [2018-11-28 11:22:04,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:04,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:04,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:04,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:04,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -190850389, now seen corresponding path program 1 times [2018-11-28 11:22:04,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:04,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:04,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:04,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:04,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1249696767, now seen corresponding path program 1 times [2018-11-28 11:22:04,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:04,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:04,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:04,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 11:22:05,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:05,070 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:05,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:05,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-28 11:22:05,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:05,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-11-28 11:22:05,370 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:05,370 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:05,370 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:05,370 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:05,370 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:05,370 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:05,370 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:05,370 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:05,370 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration6_Loop [2018-11-28 11:22:05,370 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:05,370 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:05,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:05,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:05,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:05,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:05,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:05,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:05,409 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:05,410 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 78 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:05,411 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:05,411 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:05,413 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:05,413 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:05,427 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:05,427 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 80 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:05,443 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:05,443 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:06,050 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:22:06,052 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:06,052 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:06,052 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:06,052 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:06,052 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:22:06,052 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:06,052 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:06,052 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:06,052 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration6_Loop [2018-11-28 11:22:06,052 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:06,052 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:06,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:06,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:06,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:06,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:06,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:06,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:06,091 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:06,091 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:22:06,091 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:06,091 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:06,092 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:06,092 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:06,092 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:06,092 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:06,092 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:06,092 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:06,092 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:06,093 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 [2018-11-28 11:22:06,093 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:06,093 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:06,093 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:06,093 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:06,093 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:06,093 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:06,093 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:06,094 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:06,094 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:06,094 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:06,094 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:06,094 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:06,094 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:06,094 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:06,094 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:06,094 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:06,095 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:06,096 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:06,096 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:06,096 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:06,096 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:06,096 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:06,096 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:06,097 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:06,097 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:06,098 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:22:06,099 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 11:22:06,099 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 11:22:06,099 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:22:06,099 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:22:06,099 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:22:06,099 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~m) = 1*ackermann_~m Supporting invariants [] [2018-11-28 11:22:06,100 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:22:06,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:06,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:06,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 11:22:06,197 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:22:06,197 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2018-11-28 11:22:06,321 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33. Second operand 11 states. Result 180 states and 253 transitions. Complement of second has 31 states. [2018-11-28 11:22:06,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:22:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 31 transitions. [2018-11-28 11:22:06,323 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 31 transitions. Stem has 23 letters. Loop has 20 letters. [2018-11-28 11:22:06,323 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:06,323 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:22:06,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:06,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:06,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 11:22:06,430 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:22:06,430 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2018-11-28 11:22:06,673 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33. Second operand 11 states. Result 288 states and 426 transitions. Complement of second has 49 states. [2018-11-28 11:22:06,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:22:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 44 transitions. [2018-11-28 11:22:06,675 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 20 letters. [2018-11-28 11:22:06,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:06,675 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 43 letters. Loop has 20 letters. [2018-11-28 11:22:06,676 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:06,676 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 40 letters. [2018-11-28 11:22:06,676 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:06,676 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 426 transitions. [2018-11-28 11:22:06,684 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 47 [2018-11-28 11:22:06,690 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 227 states and 351 transitions. [2018-11-28 11:22:06,690 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 128 [2018-11-28 11:22:06,690 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 130 [2018-11-28 11:22:06,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 227 states and 351 transitions. [2018-11-28 11:22:06,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:06,691 INFO L705 BuchiCegarLoop]: Abstraction has 227 states and 351 transitions. [2018-11-28 11:22:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states and 351 transitions. [2018-11-28 11:22:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2018-11-28 11:22:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-28 11:22:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 327 transitions. [2018-11-28 11:22:06,707 INFO L728 BuchiCegarLoop]: Abstraction has 212 states and 327 transitions. [2018-11-28 11:22:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 11:22:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2018-11-28 11:22:06,707 INFO L87 Difference]: Start difference. First operand 212 states and 327 transitions. Second operand 21 states. [2018-11-28 11:22:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:07,515 INFO L93 Difference]: Finished difference Result 458 states and 602 transitions. [2018-11-28 11:22:07,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 11:22:07,515 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 458 states and 602 transitions. [2018-11-28 11:22:07,520 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 49 [2018-11-28 11:22:07,524 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 458 states to 410 states and 537 transitions. [2018-11-28 11:22:07,525 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 277 [2018-11-28 11:22:07,525 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 310 [2018-11-28 11:22:07,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 410 states and 537 transitions. [2018-11-28 11:22:07,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:07,526 INFO L705 BuchiCegarLoop]: Abstraction has 410 states and 537 transitions. [2018-11-28 11:22:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states and 537 transitions. [2018-11-28 11:22:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2018-11-28 11:22:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-11-28 11:22:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 462 transitions. [2018-11-28 11:22:07,553 INFO L728 BuchiCegarLoop]: Abstraction has 341 states and 462 transitions. [2018-11-28 11:22:07,553 INFO L608 BuchiCegarLoop]: Abstraction has 341 states and 462 transitions. [2018-11-28 11:22:07,553 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-28 11:22:07,553 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 341 states and 462 transitions. [2018-11-28 11:22:07,555 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 34 [2018-11-28 11:22:07,555 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:07,555 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:07,559 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:07,559 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:22:07,559 INFO L794 eck$LassoCheckResult]: Stem: 3363#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3310#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 3311#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 3362#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 3368#ackermannENTRY ~m := #in~m;~n := #in~n; 3407#L15 assume !(0 == ~m); 3406#L18 assume 0 == ~n; 3336#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3399#ackermannENTRY ~m := #in~m;~n := #in~n; 3404#L15 assume !(0 == ~m); 3413#L18 assume !(0 == ~n); 3384#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3410#ackermannENTRY ~m := #in~m;~n := #in~n; 3390#L15 assume !(0 == ~m); 3383#L18 assume 0 == ~n; 3385#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3349#ackermannENTRY ~m := #in~m;~n := #in~n; 3482#L15 assume 0 == ~m;#res := 1 + ~n; 3496#ackermannFINAL assume true; 3417#ackermannEXIT >#42#return; 3418#L19-1 #res := #t~ret0;havoc #t~ret0; 3623#ackermannFINAL assume true; 3621#ackermannEXIT >#44#return; 3326#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3338#ackermannENTRY ~m := #in~m;~n := #in~n; 3645#L15 assume !(0 == ~m); 3352#L18 assume !(0 == ~n); 3312#L21 [2018-11-28 11:22:07,559 INFO L796 eck$LassoCheckResult]: Loop: 3312#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3313#ackermannENTRY ~m := #in~m;~n := #in~n; 3350#L15 assume !(0 == ~m); 3364#L18 assume !(0 == ~n); 3312#L21 [2018-11-28 11:22:07,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash 229970726, now seen corresponding path program 2 times [2018-11-28 11:22:07,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:07,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:07,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:07,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:07,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 11:22:07,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:07,615 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:07,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:22:07,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:22:07,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:22:07,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 11:22:07,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:07,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 11:22:07,682 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:22:07,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2228500, now seen corresponding path program 4 times [2018-11-28 11:22:07,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:07,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:07,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:07,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:07,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:07,719 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:07,719 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:07,720 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:07,720 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:07,720 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:07,720 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,720 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:07,720 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:07,720 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration7_Loop [2018-11-28 11:22:07,720 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:07,720 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:07,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:07,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:07,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:07,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:07,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:07,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:07,785 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:07,785 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 82 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,792 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:07,792 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:07,794 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:07,795 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 83 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 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,819 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:07,819 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:07,821 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:07,821 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 84 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,845 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:07,845 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:07,848 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:07,848 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 85 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,863 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:07,863 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:07,865 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:07,865 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 86 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,881 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:07,881 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:07,884 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:07,884 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7, ackermann_~m=7} Honda state: {ackermann_#in~m=7, ackermann_~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 87 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 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,899 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:07,900 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 88 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:07,919 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:07,919 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,064 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,064 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=-4, ackermann_#in~n=-8} Honda state: {ackermann_~n=-4, ackermann_#in~n=-8} Generalized eigenvectors: [{ackermann_~n=-1, ackermann_#in~n=0}, {ackermann_~n=0, ackermann_#in~n=-1}, {ackermann_~n=0, ackermann_#in~n=4}] Lambdas: [1, 4, 0] Nus: [1, 1] [2018-11-28 11:22:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 11:22:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 11:22:08,078 INFO L87 Difference]: Start difference. First operand 341 states and 462 transitions. cyclomatic complexity: 134 Second operand 7 states. [2018-11-28 11:22:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:08,124 INFO L93 Difference]: Finished difference Result 255 states and 320 transitions. [2018-11-28 11:22:08,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:22:08,128 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 255 states and 320 transitions. [2018-11-28 11:22:08,131 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 17 [2018-11-28 11:22:08,133 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 255 states to 229 states and 287 transitions. [2018-11-28 11:22:08,133 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 182 [2018-11-28 11:22:08,133 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 182 [2018-11-28 11:22:08,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 287 transitions. [2018-11-28 11:22:08,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:08,134 INFO L705 BuchiCegarLoop]: Abstraction has 229 states and 287 transitions. [2018-11-28 11:22:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 287 transitions. [2018-11-28 11:22:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 212. [2018-11-28 11:22:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-28 11:22:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 268 transitions. [2018-11-28 11:22:08,140 INFO L728 BuchiCegarLoop]: Abstraction has 212 states and 268 transitions. [2018-11-28 11:22:08,140 INFO L608 BuchiCegarLoop]: Abstraction has 212 states and 268 transitions. [2018-11-28 11:22:08,140 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-28 11:22:08,140 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 212 states and 268 transitions. [2018-11-28 11:22:08,142 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 17 [2018-11-28 11:22:08,142 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:08,142 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:08,143 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:08,143 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 11:22:08,143 INFO L794 eck$LassoCheckResult]: Stem: 4033#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3999#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 4000#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 4032#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 4035#ackermannENTRY ~m := #in~m;~n := #in~n; 4061#L15 assume !(0 == ~m); 4055#L18 assume 0 == ~n; 4012#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4054#ackermannENTRY ~m := #in~m;~n := #in~n; 4052#L15 assume !(0 == ~m); 4053#L18 assume !(0 == ~n); 4021#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4045#ackermannENTRY ~m := #in~m;~n := #in~n; 4046#L15 assume !(0 == ~m); 4040#L18 assume 0 == ~n; 4041#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4019#ackermannENTRY ~m := #in~m;~n := #in~n; 4111#L15 assume !(0 == ~m); 4109#L18 assume !(0 == ~n); 4105#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4106#ackermannENTRY ~m := #in~m;~n := #in~n; 4123#L15 assume !(0 == ~m); 4121#L18 assume 0 == ~n; 4114#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4116#ackermannENTRY ~m := #in~m;~n := #in~n; 4122#L15 assume 0 == ~m;#res := 1 + ~n; 4118#ackermannFINAL assume true; 4112#ackermannEXIT >#42#return; 4110#L19-1 #res := #t~ret0;havoc #t~ret0; 4108#ackermannFINAL assume true; 4104#ackermannEXIT >#44#return; 4101#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4102#ackermannENTRY ~m := #in~m;~n := #in~n; 4107#L15 assume 0 == ~m;#res := 1 + ~n; 4103#ackermannFINAL assume true; 4100#ackermannEXIT >#46#return; 4099#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4098#ackermannFINAL assume true; 4087#ackermannEXIT >#42#return; 4076#L19-1 #res := #t~ret0;havoc #t~ret0; 4074#ackermannFINAL assume true; 4069#ackermannEXIT >#44#return; 4048#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4063#ackermannENTRY ~m := #in~m;~n := #in~n; 4050#L15 assume !(0 == ~m); 4047#L18 assume !(0 == ~n); 4004#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4005#ackermannENTRY [2018-11-28 11:22:08,143 INFO L796 eck$LassoCheckResult]: Loop: 4005#ackermannENTRY ~m := #in~m;~n := #in~n; 4166#L15 assume !(0 == ~m); 4165#L18 assume !(0 == ~n); 4001#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4005#ackermannENTRY [2018-11-28 11:22:08,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2042677982, now seen corresponding path program 1 times [2018-11-28 11:22:08,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:08,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:08,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:08,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:08,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:08,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 5 times [2018-11-28 11:22:08,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:08,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:08,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:08,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:08,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:08,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:08,166 INFO L82 PathProgramCache]: Analyzing trace with hash -997227989, now seen corresponding path program 2 times [2018-11-28 11:22:08,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:08,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:08,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:08,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:08,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:08,217 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:08,217 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:08,217 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:08,217 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:08,217 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:08,217 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,217 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:08,217 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:08,217 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration8_Loop [2018-11-28 11:22:08,217 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:08,217 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:08,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,266 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:08,266 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 89 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,288 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,289 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,291 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,291 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 90 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,307 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,307 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 91 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 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,328 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:08,328 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,336 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,337 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=-1} Honda state: {ackermann_#in~n=-1} Generalized eigenvectors: [{ackermann_#in~n=0}, {ackermann_#in~n=0}, {ackermann_#in~n=-1}] Lambdas: [0, 0, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 92 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 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,354 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,354 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,356 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,356 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 93 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 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,372 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,372 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,376 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,376 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 94 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 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,394 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,394 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,396 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,396 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 11:22:08,412 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,412 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,424 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,424 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 96 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,450 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,450 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,452 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,452 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 97 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 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,468 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,468 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,472 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,472 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-1} Honda state: {ackermann_#in~m=-1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 11:22:08,846 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:08,846 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:08,846 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:08,846 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:08,846 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:08,846 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,846 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:08,846 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:08,847 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration8_Lasso [2018-11-28 11:22:08,847 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:08,847 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:08,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:08,950 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:08,950 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 98 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 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,957 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,957 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,959 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,959 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 99 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 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,975 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,975 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,977 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,977 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 100 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 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:08,992 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:08,993 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:08,995 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:08,995 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 101 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 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,011 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,011 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,012 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,013 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 102 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 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,028 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,029 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,030 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,031 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 103 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 103 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,046 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,046 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,049 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,049 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=0} Honda state: {ackermann_#in~m=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 104 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 104 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,065 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,065 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,067 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,067 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 105 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 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,083 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,083 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,085 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,085 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret6=0} Honda state: {ULTIMATE.start_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 106 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 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,100 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,100 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,102 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,102 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~result~0=0} Honda state: {ULTIMATE.start_main_~result~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 107 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 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,118 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,118 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,121 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,121 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~n~0=0} Honda state: {ULTIMATE.start_main_~n~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 108 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 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,137 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,138 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,139 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,139 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 /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 109 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 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,155 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,155 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,157 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,157 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 110 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 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,175 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,175 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,177 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:09,177 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 111 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 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,204 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:09,204 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 112 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 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,224 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:09,224 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:09,240 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:22:09,241 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:09,241 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:09,241 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:09,241 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:09,241 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:22:09,241 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:09,241 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:09,241 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:09,242 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration8_Lasso [2018-11-28 11:22:09,242 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:09,242 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:09,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:09,348 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:09,348 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:22:09,348 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,348 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,348 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,349 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,349 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,349 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,349 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,349 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,349 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,350 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,350 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,350 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,350 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,350 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,350 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,350 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,350 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,351 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,351 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,351 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,351 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,352 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,352 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,352 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,352 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,352 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,352 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,353 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,353 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,353 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,353 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,353 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,353 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,353 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,354 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,354 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,354 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,354 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,354 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,355 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 11:22:09,355 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,356 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 11:22:09,356 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 11:22:09,362 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,363 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,363 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,363 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,363 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,363 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,363 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,364 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,364 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,364 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,364 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,365 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,365 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,365 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,365 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,365 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,365 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,365 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,366 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,366 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,366 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,366 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,366 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,366 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,366 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,367 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,367 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,367 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,367 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,368 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,368 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,368 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,368 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,368 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,368 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,368 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,369 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,369 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,369 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,369 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,369 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,369 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,370 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,370 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,370 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,370 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,370 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,371 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,371 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,371 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,371 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,371 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,371 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,371 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,372 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,372 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,372 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,372 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,373 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,373 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,373 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,373 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,373 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,373 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,374 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,374 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,374 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,374 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,374 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,374 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,375 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,375 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,375 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,375 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,376 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,376 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:22:09,376 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,376 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:22:09,376 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,376 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:22:09,376 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:22:09,377 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:22:09,377 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:22:09,377 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:22:09,377 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:22:09,377 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 11:22:09,377 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:22:09,379 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 11:22:09,379 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 11:22:09,389 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:22:09,398 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2018-11-28 11:22:09,398 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 3 variables to zero. [2018-11-28 11:22:09,398 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:22:09,399 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 11:22:09,399 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:22:09,399 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2018-11-28 11:22:09,436 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 11:22:09,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:09,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:09,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:09,753 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.13 stem predicates 3 loop predicates [2018-11-28 11:22:09,753 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-11-28 11:22:09,823 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63. Second operand 16 states. Result 221 states and 282 transitions. Complement of second has 7 states. [2018-11-28 11:22:09,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 3 stem states 0 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 11:22:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-28 11:22:09,824 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 11:22:09,824 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:09,824 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:22:09,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:09,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:10,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:10,072 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.13 stem predicates 3 loop predicates [2018-11-28 11:22:10,072 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-11-28 11:22:10,132 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63. Second operand 16 states. Result 221 states and 282 transitions. Complement of second has 7 states. [2018-11-28 11:22:10,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 3 stem states 0 non-accepting loop states 1 accepting loop states [2018-11-28 11:22:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 11:22:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-28 11:22:10,137 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 11:22:10,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:10,137 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:22:10,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:10,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:10,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:22:10,381 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.13 stem predicates 3 loop predicates [2018-11-28 11:22:10,381 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-11-28 11:22:11,079 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63. Second operand 16 states. Result 506 states and 647 transitions. Complement of second has 68 states. [2018-11-28 11:22:11,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 25 states 20 stem states 2 non-accepting loop states 2 accepting loop states [2018-11-28 11:22:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 11:22:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 72 transitions. [2018-11-28 11:22:11,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 11:22:11,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:11,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-28 11:22:11,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:11,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-28 11:22:11,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:22:11,081 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 506 states and 647 transitions. [2018-11-28 11:22:11,085 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:11,088 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 506 states to 331 states and 405 transitions. [2018-11-28 11:22:11,088 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 266 [2018-11-28 11:22:11,088 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 270 [2018-11-28 11:22:11,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 331 states and 405 transitions. [2018-11-28 11:22:11,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:11,089 INFO L705 BuchiCegarLoop]: Abstraction has 331 states and 405 transitions. [2018-11-28 11:22:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states and 405 transitions. [2018-11-28 11:22:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 293. [2018-11-28 11:22:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-11-28 11:22:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 360 transitions. [2018-11-28 11:22:11,097 INFO L728 BuchiCegarLoop]: Abstraction has 293 states and 360 transitions. [2018-11-28 11:22:11,097 INFO L608 BuchiCegarLoop]: Abstraction has 293 states and 360 transitions. [2018-11-28 11:22:11,097 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-28 11:22:11,097 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 293 states and 360 transitions. [2018-11-28 11:22:11,099 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:11,099 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:11,099 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:11,100 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:11,100 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:11,100 INFO L794 eck$LassoCheckResult]: Stem: 5854#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 5821#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 5822#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 5853#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 5860#ackermannENTRY ~m := #in~m;~n := #in~n; 5880#L15 assume !(0 == ~m); 5879#L18 assume 0 == ~n; 5873#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5878#ackermannENTRY ~m := #in~m;~n := #in~n; 5876#L15 assume !(0 == ~m); 5877#L18 assume !(0 == ~n); 5837#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5875#ackermannENTRY ~m := #in~m;~n := #in~n; 5868#L15 assume !(0 == ~m); 5870#L18 assume 0 == ~n; 5836#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5838#ackermannENTRY ~m := #in~m;~n := #in~n; 5951#L15 assume !(0 == ~m); 5949#L18 assume !(0 == ~n); 5944#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5945#ackermannENTRY ~m := #in~m;~n := #in~n; 5962#L15 assume !(0 == ~m); 5958#L18 assume 0 == ~n; 5953#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5956#ackermannENTRY ~m := #in~m;~n := #in~n; 5965#L15 assume 0 == ~m;#res := 1 + ~n; 5959#ackermannFINAL assume true; 5952#ackermannEXIT >#42#return; 5950#L19-1 #res := #t~ret0;havoc #t~ret0; 5948#ackermannFINAL assume true; 5943#ackermannEXIT >#44#return; 5940#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5941#ackermannENTRY ~m := #in~m;~n := #in~n; 5946#L15 assume 0 == ~m;#res := 1 + ~n; 5942#ackermannFINAL assume true; 5939#ackermannEXIT >#46#return; 5938#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5935#ackermannFINAL assume true; 5934#ackermannEXIT >#42#return; 5914#L19-1 #res := #t~ret0;havoc #t~ret0; 5912#ackermannFINAL assume true; 5901#ackermannEXIT >#44#return; 5902#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5984#ackermannENTRY ~m := #in~m;~n := #in~n; 5991#L15 assume !(0 == ~m); 5992#L18 assume !(0 == ~n); 6012#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5825#ackermannENTRY ~m := #in~m;~n := #in~n; 6067#L15 assume !(0 == ~m); 6061#L18 assume 0 == ~n; 6056#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5835#ackermannENTRY [2018-11-28 11:22:11,100 INFO L796 eck$LassoCheckResult]: Loop: 5835#ackermannENTRY ~m := #in~m;~n := #in~n; 6062#L15 assume !(0 == ~m); 6063#L18 assume !(0 == ~n); 5834#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6071#ackermannENTRY ~m := #in~m;~n := #in~n; 6068#L15 assume !(0 == ~m); 6066#L18 assume 0 == ~n; 5833#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5835#ackermannENTRY [2018-11-28 11:22:11,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -997228084, now seen corresponding path program 3 times [2018-11-28 11:22:11,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:11,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:11,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:11,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 11:22:11,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:11,205 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:11,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:22:11,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 11:22:11,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:22:11,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 11:22:11,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:11,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 11:22:11,269 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:22:11,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 2 times [2018-11-28 11:22:11,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:11,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:11,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:11,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:11,335 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:11,335 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:11,335 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:11,335 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:11,336 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:11,336 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,336 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:11,336 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:11,336 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration9_Loop [2018-11-28 11:22:11,336 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:11,336 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:11,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:11,368 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:11,368 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 114 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 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,371 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,371 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,373 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,373 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 115 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 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,387 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,387 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,389 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,389 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 116 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,404 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,404 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,405 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 117 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 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,420 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,420 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,421 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,422 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 118 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 118 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,436 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,436 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,438 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,438 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 119 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 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,452 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,452 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,454 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,454 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 120 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 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,468 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,468 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 121 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 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,484 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:11,485 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,494 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,494 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 122 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 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:11,508 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:11,509 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:11,510 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:11,511 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 11:22:11,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 11:22:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:22:11,524 INFO L87 Difference]: Start difference. First operand 293 states and 360 transitions. cyclomatic complexity: 74 Second operand 15 states. [2018-11-28 11:22:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:11,786 INFO L93 Difference]: Finished difference Result 301 states and 365 transitions. [2018-11-28 11:22:11,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 11:22:11,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 301 states and 365 transitions. [2018-11-28 11:22:11,789 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:11,792 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 301 states to 297 states and 361 transitions. [2018-11-28 11:22:11,792 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 236 [2018-11-28 11:22:11,793 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 236 [2018-11-28 11:22:11,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 297 states and 361 transitions. [2018-11-28 11:22:11,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:11,793 INFO L705 BuchiCegarLoop]: Abstraction has 297 states and 361 transitions. [2018-11-28 11:22:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states and 361 transitions. [2018-11-28 11:22:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 277. [2018-11-28 11:22:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-11-28 11:22:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 339 transitions. [2018-11-28 11:22:11,800 INFO L728 BuchiCegarLoop]: Abstraction has 277 states and 339 transitions. [2018-11-28 11:22:11,800 INFO L608 BuchiCegarLoop]: Abstraction has 277 states and 339 transitions. [2018-11-28 11:22:11,800 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-28 11:22:11,800 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 277 states and 339 transitions. [2018-11-28 11:22:11,802 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:11,802 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:11,802 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:11,805 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 8, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:11,805 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:11,805 INFO L794 eck$LassoCheckResult]: Stem: 6664#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 6625#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 6626#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 6663#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 6669#ackermannENTRY ~m := #in~m;~n := #in~n; 6683#L15 assume !(0 == ~m); 6682#L18 assume 0 == ~n; 6679#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6681#ackermannENTRY ~m := #in~m;~n := #in~n; 6677#L15 assume !(0 == ~m); 6680#L18 assume !(0 == ~n); 6672#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6675#ackermannENTRY ~m := #in~m;~n := #in~n; 6673#L15 assume !(0 == ~m); 6671#L18 assume 0 == ~n; 6652#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6646#ackermannENTRY ~m := #in~m;~n := #in~n; 6654#L15 assume !(0 == ~m); 6668#L18 assume !(0 == ~n); 6636#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6722#ackermannENTRY ~m := #in~m;~n := #in~n; 6723#L15 assume !(0 == ~m); 6717#L18 assume 0 == ~n; 6718#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6642#ackermannENTRY ~m := #in~m;~n := #in~n; 6817#L15 assume 0 == ~m;#res := 1 + ~n; 6816#ackermannFINAL assume true; 6814#ackermannEXIT >#42#return; 6813#L19-1 #res := #t~ret0;havoc #t~ret0; 6812#ackermannFINAL assume true; 6809#ackermannEXIT >#44#return; 6807#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 6808#ackermannENTRY ~m := #in~m;~n := #in~n; 6811#L15 assume 0 == ~m;#res := 1 + ~n; 6810#ackermannFINAL assume true; 6806#ackermannEXIT >#46#return; 6805#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 6804#ackermannFINAL assume true; 6747#ackermannEXIT >#42#return; 6742#L19-1 #res := #t~ret0;havoc #t~ret0; 6740#ackermannFINAL assume true; 6729#ackermannEXIT >#44#return; 6628#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 6698#ackermannENTRY ~m := #in~m;~n := #in~n; 6692#L15 assume !(0 == ~m); 6691#L18 assume !(0 == ~n); 6627#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6629#ackermannENTRY ~m := #in~m;~n := #in~n; 6710#L15 assume !(0 == ~m); 6706#L18 assume !(0 == ~n); 6660#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6704#ackermannENTRY ~m := #in~m;~n := #in~n; 6702#L15 assume !(0 == ~m); 6703#L18 assume 0 == ~n; 6631#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6716#ackermannENTRY [2018-11-28 11:22:11,805 INFO L796 eck$LassoCheckResult]: Loop: 6716#ackermannENTRY ~m := #in~m;~n := #in~n; 6711#L15 assume !(0 == ~m); 6655#L18 assume !(0 == ~n); 6630#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6634#ackermannENTRY ~m := #in~m;~n := #in~n; 6700#L15 assume !(0 == ~m); 6699#L18 assume 0 == ~n; 6632#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6716#ackermannENTRY [2018-11-28 11:22:11,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash 258460313, now seen corresponding path program 4 times [2018-11-28 11:22:11,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:11,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:11,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:11,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 11:22:11,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:11,912 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:11,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:22:11,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:22:11,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:22:11,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 11:22:11,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:11,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-28 11:22:11,957 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:22:11,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 3 times [2018-11-28 11:22:11,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:11,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:12,018 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:12,018 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:12,018 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:12,018 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:12,018 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:12,018 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,018 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:12,018 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:12,018 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration10_Loop [2018-11-28 11:22:12,018 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:12,018 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:12,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:12,051 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:12,051 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 124 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 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,054 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,054 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,056 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,057 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 125 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 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,072 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,072 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,074 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,074 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 126 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 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,090 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,090 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,092 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,092 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 127 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 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,108 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,108 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,110 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,110 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 128 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 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,126 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,126 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,128 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,128 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 129 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 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,143 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,143 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,145 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,145 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 130 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 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,160 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,160 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,162 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,162 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 131 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 131 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,176 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:12,176 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 132 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 132 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:12,192 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:12,192 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:12,236 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:12,236 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=-1}, {ackermann_#in~m=0}] Lambdas: [0, 1, 8] Nus: [0, 0] [2018-11-28 11:22:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 11:22:12,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-11-28 11:22:12,250 INFO L87 Difference]: Start difference. First operand 277 states and 339 transitions. cyclomatic complexity: 69 Second operand 17 states. [2018-11-28 11:22:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:12,611 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2018-11-28 11:22:12,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 11:22:12,611 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 322 states and 390 transitions. [2018-11-28 11:22:12,613 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-28 11:22:12,615 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 322 states to 318 states and 386 transitions. [2018-11-28 11:22:12,616 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 248 [2018-11-28 11:22:12,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 248 [2018-11-28 11:22:12,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 318 states and 386 transitions. [2018-11-28 11:22:12,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:12,616 INFO L705 BuchiCegarLoop]: Abstraction has 318 states and 386 transitions. [2018-11-28 11:22:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states and 386 transitions. [2018-11-28 11:22:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 304. [2018-11-28 11:22:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-11-28 11:22:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2018-11-28 11:22:12,625 INFO L728 BuchiCegarLoop]: Abstraction has 304 states and 372 transitions. [2018-11-28 11:22:12,625 INFO L608 BuchiCegarLoop]: Abstraction has 304 states and 372 transitions. [2018-11-28 11:22:12,625 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-11-28 11:22:12,625 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 304 states and 372 transitions. [2018-11-28 11:22:12,627 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:12,627 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:12,627 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:12,628 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [11, 9, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:22:12,628 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:12,628 INFO L794 eck$LassoCheckResult]: Stem: 7494#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 7456#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 7457#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 7493#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 7500#ackermannENTRY ~m := #in~m;~n := #in~n; 7521#L15 assume !(0 == ~m); 7522#L18 assume 0 == ~n; 7514#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7517#ackermannENTRY ~m := #in~m;~n := #in~n; 7513#L15 assume !(0 == ~m); 7516#L18 assume !(0 == ~n); 7506#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7510#ackermannENTRY ~m := #in~m;~n := #in~n; 7511#L15 assume !(0 == ~m); 7505#L18 assume 0 == ~n; 7482#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7477#ackermannENTRY ~m := #in~m;~n := #in~n; 7484#L15 assume !(0 == ~m); 7499#L18 assume !(0 == ~n); 7616#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7662#ackermannENTRY ~m := #in~m;~n := #in~n; 7674#L15 assume !(0 == ~m); 7672#L18 assume 0 == ~n; 7667#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7670#ackermannENTRY ~m := #in~m;~n := #in~n; 7681#L15 assume 0 == ~m;#res := 1 + ~n; 7673#ackermannFINAL assume true; 7666#ackermannEXIT >#42#return; 7665#L19-1 #res := #t~ret0;havoc #t~ret0; 7664#ackermannFINAL assume true; 7661#ackermannEXIT >#44#return; 7658#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7659#ackermannENTRY ~m := #in~m;~n := #in~n; 7663#L15 assume 0 == ~m;#res := 1 + ~n; 7660#ackermannFINAL assume true; 7657#ackermannEXIT >#46#return; 7656#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 7648#ackermannFINAL assume true; 7585#ackermannEXIT >#42#return; 7584#L19-1 #res := #t~ret0;havoc #t~ret0; 7582#ackermannFINAL assume true; 7553#ackermannEXIT >#44#return; 7529#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7533#ackermannENTRY ~m := #in~m;~n := #in~n; 7531#L15 assume !(0 == ~m); 7528#L18 assume !(0 == ~n); 7530#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7460#ackermannENTRY ~m := #in~m;~n := #in~n; 7548#L15 assume !(0 == ~m); 7549#L18 assume !(0 == ~n); 7541#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7543#ackermannENTRY ~m := #in~m;~n := #in~n; 7542#L15 assume !(0 == ~m); 7540#L18 assume !(0 == ~n); 7488#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7538#ackermannENTRY ~m := #in~m;~n := #in~n; 7535#L15 assume !(0 == ~m); 7536#L18 assume 0 == ~n; 7463#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7473#ackermannENTRY [2018-11-28 11:22:12,628 INFO L796 eck$LassoCheckResult]: Loop: 7473#ackermannENTRY ~m := #in~m;~n := #in~n; 7695#L15 assume !(0 == ~m); 7491#L18 assume !(0 == ~n); 7461#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7462#ackermannENTRY ~m := #in~m;~n := #in~n; 7537#L15 assume !(0 == ~m); 7534#L18 assume 0 == ~n; 7465#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7473#ackermannENTRY [2018-11-28 11:22:12,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash 807724262, now seen corresponding path program 5 times [2018-11-28 11:22:12,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:12,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:12,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:12,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:12,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:12,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:12,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 4 times [2018-11-28 11:22:12,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:12,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:12,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:12,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:12,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:12,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1221239647, now seen corresponding path program 6 times [2018-11-28 11:22:12,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:12,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:12,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:12,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:12,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 131 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-11-28 11:22:12,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:12,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:12,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:22:12,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-28 11:22:12,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:22:12,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 128 proven. 70 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-28 11:22:12,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:12,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 18 [2018-11-28 11:22:13,039 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:13,039 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:13,039 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:13,039 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:13,039 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:13,039 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,039 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:13,039 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:13,039 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration11_Loop [2018-11-28 11:22:13,039 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:13,039 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:13,040 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,093 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:13,093 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 134 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 134 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,096 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,096 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,098 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,098 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 135 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 135 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,113 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,114 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,115 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,115 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 136 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 136 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,130 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,130 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,131 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,132 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 137 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 137 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,146 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,146 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,148 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,148 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 138 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 138 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,163 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,163 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,165 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,165 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 139 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 139 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,181 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,181 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,183 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,183 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 140 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 140 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,197 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,198 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,199 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,199 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 141 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 141 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,213 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,214 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 142 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 142 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,230 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:13,230 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,239 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,239 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] [2018-11-28 11:22:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 11:22:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-11-28 11:22:13,252 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. cyclomatic complexity: 75 Second operand 18 states. [2018-11-28 11:22:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:13,460 INFO L93 Difference]: Finished difference Result 341 states and 411 transitions. [2018-11-28 11:22:13,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 11:22:13,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 411 transitions. [2018-11-28 11:22:13,463 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:13,465 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 241 states and 286 transitions. [2018-11-28 11:22:13,465 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 172 [2018-11-28 11:22:13,465 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 172 [2018-11-28 11:22:13,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 241 states and 286 transitions. [2018-11-28 11:22:13,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:13,465 INFO L705 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-11-28 11:22:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states and 286 transitions. [2018-11-28 11:22:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-11-28 11:22:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-28 11:22:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2018-11-28 11:22:13,471 INFO L728 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-11-28 11:22:13,471 INFO L608 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-11-28 11:22:13,471 INFO L442 BuchiCegarLoop]: ======== Iteration 12============ [2018-11-28 11:22:13,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 241 states and 286 transitions. [2018-11-28 11:22:13,472 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:13,472 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:13,472 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:13,473 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [22, 16, 15, 10, 10, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-11-28 11:22:13,473 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:13,474 INFO L794 eck$LassoCheckResult]: Stem: 8381#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 8345#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 8346#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 8380#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 8388#ackermannENTRY ~m := #in~m;~n := #in~n; 8408#L15 assume !(0 == ~m); 8407#L18 assume !(0 == ~n); 8375#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8405#ackermannENTRY ~m := #in~m;~n := #in~n; 8404#L15 assume !(0 == ~m); 8403#L18 assume 0 == ~n; 8400#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8402#ackermannENTRY ~m := #in~m;~n := #in~n; 8401#L15 assume !(0 == ~m); 8399#L18 assume !(0 == ~n); 8396#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8395#ackermannENTRY ~m := #in~m;~n := #in~n; 8397#L15 assume !(0 == ~m); 8563#L18 assume 0 == ~n; 8417#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8363#ackermannENTRY ~m := #in~m;~n := #in~n; 8452#L15 assume !(0 == ~m); 8449#L18 assume !(0 == ~n); 8357#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8445#ackermannENTRY ~m := #in~m;~n := #in~n; 8488#L15 assume !(0 == ~m); 8479#L18 assume 0 == ~n; 8476#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8426#ackermannENTRY ~m := #in~m;~n := #in~n; 8500#L15 assume 0 == ~m;#res := 1 + ~n; 8499#ackermannFINAL assume true; 8475#ackermannEXIT >#42#return; 8473#L19-1 #res := #t~ret0;havoc #t~ret0; 8472#ackermannFINAL assume true; 8444#ackermannEXIT >#44#return; 8439#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8440#ackermannENTRY ~m := #in~m;~n := #in~n; 8454#L15 assume 0 == ~m;#res := 1 + ~n; 8453#ackermannFINAL assume true; 8438#ackermannEXIT >#46#return; 8434#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8430#ackermannFINAL assume true; 8416#ackermannEXIT >#42#return; 8418#L19-1 #res := #t~ret0;havoc #t~ret0; 8549#ackermannFINAL assume true; 8494#ackermannEXIT >#44#return; 8447#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8448#ackermannENTRY ~m := #in~m;~n := #in~n; 8579#L15 assume !(0 == ~m); 8498#L18 assume !(0 == ~n); 8368#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8366#ackermannENTRY ~m := #in~m;~n := #in~n; 8370#L15 assume !(0 == ~m); 8580#L18 assume !(0 == ~n); 8510#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8511#ackermannENTRY ~m := #in~m;~n := #in~n; 8574#L15 assume !(0 == ~m); 8573#L18 assume !(0 == ~n); 8384#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8524#ackermannENTRY ~m := #in~m;~n := #in~n; 8382#L15 assume !(0 == ~m); 8385#L18 assume 0 == ~n; 8412#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8492#ackermannENTRY ~m := #in~m;~n := #in~n; 8495#L15 assume 0 == ~m;#res := 1 + ~n; 8491#ackermannFINAL assume true; 8413#ackermannEXIT >#42#return; 8415#L19-1 #res := #t~ret0;havoc #t~ret0; 8526#ackermannFINAL assume true; 8523#ackermannEXIT >#44#return; 8483#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8521#ackermannENTRY ~m := #in~m;~n := #in~n; 8542#L15 assume 0 == ~m;#res := 1 + ~n; 8532#ackermannFINAL assume true; 8480#ackermannEXIT >#46#return; 8484#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8517#ackermannFINAL assume true; 8509#ackermannEXIT >#44#return; 8507#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8487#ackermannENTRY ~m := #in~m;~n := #in~n; 8548#L15 assume 0 == ~m;#res := 1 + ~n; 8547#ackermannFINAL assume true; 8505#ackermannEXIT >#46#return; 8504#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8496#ackermannFINAL assume true; 8466#ackermannEXIT >#44#return; 8460#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8464#ackermannENTRY ~m := #in~m;~n := #in~n; 8493#L15 assume 0 == ~m;#res := 1 + ~n; 8490#ackermannFINAL assume true; 8458#ackermannEXIT >#46#return; 8456#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8455#ackermannFINAL assume true; 8446#ackermannEXIT >#46#return; 8436#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8432#ackermannFINAL assume true; 8422#ackermannEXIT >#42#return; 8374#L19-1 #res := #t~ret0;havoc #t~ret0; 8377#ackermannFINAL assume true; 8582#ackermannEXIT >#44#return; 8349#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8411#ackermannENTRY ~m := #in~m;~n := #in~n; 8410#L15 assume !(0 == ~m); 8409#L18 assume !(0 == ~n); 8347#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8350#ackermannENTRY ~m := #in~m;~n := #in~n; 8577#L15 assume !(0 == ~m); 8576#L18 assume !(0 == ~n); 8372#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8371#ackermannENTRY ~m := #in~m;~n := #in~n; 8373#L15 assume !(0 == ~m); 8581#L18 assume !(0 == ~n); 8427#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8450#ackermannENTRY ~m := #in~m;~n := #in~n; 8437#L15 assume !(0 == ~m); 8433#L18 assume 0 == ~n; 8421#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8429#ackermannENTRY ~m := #in~m;~n := #in~n; 8513#L15 assume !(0 == ~m); 8514#L18 assume !(0 == ~n); 8468#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8471#ackermannENTRY ~m := #in~m;~n := #in~n; 8502#L15 assume !(0 == ~m); 8501#L18 assume 0 == ~n; 8352#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8359#ackermannENTRY [2018-11-28 11:22:13,474 INFO L796 eck$LassoCheckResult]: Loop: 8359#ackermannENTRY ~m := #in~m;~n := #in~n; 8512#L15 assume !(0 == ~m); 8378#L18 assume !(0 == ~n); 8351#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8355#ackermannENTRY ~m := #in~m;~n := #in~n; 8386#L15 assume !(0 == ~m); 8387#L18 assume 0 == ~n; 8353#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8359#ackermannENTRY [2018-11-28 11:22:13,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash 286526941, now seen corresponding path program 7 times [2018-11-28 11:22:13,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:13,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:13,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:13,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:13,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 495 proven. 85 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 11:22:13,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:13,658 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:13,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:13,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 495 proven. 85 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 11:22:13,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:13,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 11:22:13,733 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:22:13,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 5 times [2018-11-28 11:22:13,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:13,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:13,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:13,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:13,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:13,802 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:13,802 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:13,802 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:13,802 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:13,802 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:13,802 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,802 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:13,802 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:13,802 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration12_Loop [2018-11-28 11:22:13,802 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:13,802 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:13,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:13,839 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:13,839 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 144 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 144 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,842 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,842 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,843 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,844 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 145 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 145 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,858 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,858 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,860 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,860 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 146 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 146 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,874 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,875 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,876 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,876 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 147 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 147 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,890 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,890 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,892 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,893 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 148 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 148 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,907 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,909 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,909 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 149 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 149 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,923 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,923 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,925 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,925 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 150 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 150 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,939 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,939 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,942 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,942 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 151 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 151 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,957 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:13,958 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 152 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 152 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:13,974 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:13,974 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:13,983 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:13,983 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] [2018-11-28 11:22:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 11:22:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2018-11-28 11:22:13,997 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. cyclomatic complexity: 52 Second operand 25 states. [2018-11-28 11:22:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:14,779 INFO L93 Difference]: Finished difference Result 396 states and 482 transitions. [2018-11-28 11:22:14,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-28 11:22:14,780 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 396 states and 482 transitions. [2018-11-28 11:22:14,782 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:14,783 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 396 states to 392 states and 478 transitions. [2018-11-28 11:22:14,783 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 308 [2018-11-28 11:22:14,784 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2018-11-28 11:22:14,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 392 states and 478 transitions. [2018-11-28 11:22:14,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:14,785 INFO L705 BuchiCegarLoop]: Abstraction has 392 states and 478 transitions. [2018-11-28 11:22:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states and 478 transitions. [2018-11-28 11:22:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 347. [2018-11-28 11:22:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-11-28 11:22:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 420 transitions. [2018-11-28 11:22:14,793 INFO L728 BuchiCegarLoop]: Abstraction has 347 states and 420 transitions. [2018-11-28 11:22:14,793 INFO L608 BuchiCegarLoop]: Abstraction has 347 states and 420 transitions. [2018-11-28 11:22:14,794 INFO L442 BuchiCegarLoop]: ======== Iteration 13============ [2018-11-28 11:22:14,794 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 347 states and 420 transitions. [2018-11-28 11:22:14,796 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:14,796 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:14,796 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:14,797 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [23, 17, 15, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-11-28 11:22:14,797 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:14,797 INFO L794 eck$LassoCheckResult]: Stem: 9523#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 9486#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 9487#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 9522#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 9529#ackermannENTRY ~m := #in~m;~n := #in~n; 9551#L15 assume !(0 == ~m); 9552#L18 assume !(0 == ~n); 9545#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9548#ackermannENTRY ~m := #in~m;~n := #in~n; 9547#L15 assume !(0 == ~m); 9546#L18 assume 0 == ~n; 9541#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9543#ackermannENTRY ~m := #in~m;~n := #in~n; 9540#L15 assume !(0 == ~m); 9542#L18 assume !(0 == ~n); 9534#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9693#ackermannENTRY ~m := #in~m;~n := #in~n; 9533#L15 assume !(0 == ~m); 9536#L18 assume 0 == ~n; 9497#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9511#ackermannENTRY ~m := #in~m;~n := #in~n; 9585#L15 assume !(0 == ~m); 9586#L18 assume !(0 == ~n); 9575#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9579#ackermannENTRY ~m := #in~m;~n := #in~n; 9574#L15 assume !(0 == ~m); 9577#L18 assume 0 == ~n; 9764#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9766#ackermannENTRY ~m := #in~m;~n := #in~n; 9773#L15 assume 0 == ~m;#res := 1 + ~n; 9771#ackermannFINAL assume true; 9762#ackermannEXIT >#42#return; 9765#L19-1 #res := #t~ret0;havoc #t~ret0; 9768#ackermannFINAL assume true; 9723#ackermannEXIT >#44#return; 9719#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9720#ackermannENTRY ~m := #in~m;~n := #in~n; 9782#L15 assume 0 == ~m;#res := 1 + ~n; 9781#ackermannFINAL assume true; 9718#ackermannEXIT >#46#return; 9717#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9715#ackermannFINAL assume true; 9696#ackermannEXIT >#42#return; 9695#L19-1 #res := #t~ret0;havoc #t~ret0; 9694#ackermannFINAL assume true; 9692#ackermannEXIT >#44#return; 9615#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9690#ackermannENTRY ~m := #in~m;~n := #in~n; 9708#L15 assume !(0 == ~m); 9683#L18 assume !(0 == ~n); 9592#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9612#ackermannENTRY ~m := #in~m;~n := #in~n; 9613#L15 assume !(0 == ~m); 9590#L18 assume !(0 == ~n); 9593#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9803#ackermannENTRY ~m := #in~m;~n := #in~n; 9807#L15 assume !(0 == ~m); 9806#L18 assume !(0 == ~n); 9507#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9566#ackermannENTRY ~m := #in~m;~n := #in~n; 9568#L15 assume !(0 == ~m); 9573#L18 assume 0 == ~n; 9504#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9508#ackermannENTRY ~m := #in~m;~n := #in~n; 9809#L15 assume 0 == ~m;#res := 1 + ~n; 9565#ackermannFINAL assume true; 9808#ackermannEXIT >#42#return; 9776#L19-1 #res := #t~ret0;havoc #t~ret0; 9774#ackermannFINAL assume true; 9737#ackermannEXIT >#44#return; 9730#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9736#ackermannENTRY ~m := #in~m;~n := #in~n; 9743#L15 assume 0 == ~m;#res := 1 + ~n; 9742#ackermannFINAL assume true; 9728#ackermannEXIT >#46#return; 9733#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9804#ackermannFINAL assume true; 9802#ackermannEXIT >#44#return; 9792#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9798#ackermannENTRY ~m := #in~m;~n := #in~n; 9805#L15 assume 0 == ~m;#res := 1 + ~n; 9800#ackermannFINAL assume true; 9791#ackermannEXIT >#46#return; 9789#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9788#ackermannFINAL assume true; 9786#ackermannEXIT >#44#return; 9703#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9705#ackermannENTRY ~m := #in~m;~n := #in~n; 9801#L15 assume 0 == ~m;#res := 1 + ~n; 9790#ackermannFINAL assume true; 9702#ackermannEXIT >#46#return; 9641#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9714#ackermannFINAL assume true; 9716#ackermannEXIT >#46#return; 9623#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9622#ackermannFINAL assume true; 9620#ackermannEXIT >#42#return; 9618#L19-1 #res := #t~ret0;havoc #t~ret0; 9617#ackermannFINAL assume true; 9616#ackermannEXIT >#44#return; 9607#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9611#ackermannENTRY ~m := #in~m;~n := #in~n; 9610#L15 assume !(0 == ~m); 9609#L18 assume !(0 == ~n); 9603#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9606#ackermannENTRY ~m := #in~m;~n := #in~n; 9605#L15 assume !(0 == ~m); 9604#L18 assume !(0 == ~n); 9599#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9602#ackermannENTRY ~m := #in~m;~n := #in~n; 9601#L15 assume !(0 == ~m); 9600#L18 assume !(0 == ~n); 9597#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9596#ackermannENTRY ~m := #in~m;~n := #in~n; 9598#L15 assume !(0 == ~m); 9701#L18 assume !(0 == ~n); 9558#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9571#ackermannENTRY ~m := #in~m;~n := #in~n; 9562#L15 assume !(0 == ~m); 9563#L18 assume 0 == ~n; 9499#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9569#ackermannENTRY ~m := #in~m;~n := #in~n; 9570#L15 assume !(0 == ~m); 9727#L18 assume !(0 == ~n); 9518#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9724#ackermannENTRY ~m := #in~m;~n := #in~n; 9779#L15 assume !(0 == ~m); 9780#L18 assume 0 == ~n; 9492#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9572#ackermannENTRY [2018-11-28 11:22:14,798 INFO L796 eck$LassoCheckResult]: Loop: 9572#ackermannENTRY ~m := #in~m;~n := #in~n; 9564#L15 assume !(0 == ~m); 9520#L18 assume !(0 == ~n); 9491#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9495#ackermannENTRY ~m := #in~m;~n := #in~n; 9778#L15 assume !(0 == ~m); 9560#L18 assume 0 == ~n; 9493#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9572#ackermannENTRY [2018-11-28 11:22:14,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1393549654, now seen corresponding path program 8 times [2018-11-28 11:22:14,798 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:14,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:14,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:14,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:14,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 546 proven. 104 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 11:22:14,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:14,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:15,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:22:15,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:22:15,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:22:15,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 546 proven. 104 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 11:22:15,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:15,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 11:22:15,074 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:22:15,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 6 times [2018-11-28 11:22:15,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:15,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:15,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:15,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:15,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:15,145 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:15,145 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:15,146 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:15,146 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:15,146 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:15,146 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,146 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:15,146 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:15,146 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration13_Loop [2018-11-28 11:22:15,146 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:15,146 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:15,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:15,194 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:15,194 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 154 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 154 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,209 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,209 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,211 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,211 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 155 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 155 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,228 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,228 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,236 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,236 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 156 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 156 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,252 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,252 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,255 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,256 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 157 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 157 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,280 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,280 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,283 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,283 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 158 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 158 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,307 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,307 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,308 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,308 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 159 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 159 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,323 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,323 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,326 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,326 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 160 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 160 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,342 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,342 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 161 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 161 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,358 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:15,358 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,397 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,397 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=-1}, {ackermann_#in~m=0}, {ackermann_#in~m=0}] Lambdas: [1, 0, 15] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 162 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 162 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:15,412 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:15,412 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:15,414 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:15,414 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 11:22:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 11:22:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2018-11-28 11:22:15,428 INFO L87 Difference]: Start difference. First operand 347 states and 420 transitions. cyclomatic complexity: 80 Second operand 27 states. [2018-11-28 11:22:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:16,410 INFO L93 Difference]: Finished difference Result 413 states and 501 transitions. [2018-11-28 11:22:16,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-28 11:22:16,410 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 413 states and 501 transitions. [2018-11-28 11:22:16,412 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-28 11:22:16,415 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 413 states to 409 states and 497 transitions. [2018-11-28 11:22:16,415 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 316 [2018-11-28 11:22:16,415 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 316 [2018-11-28 11:22:16,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 409 states and 497 transitions. [2018-11-28 11:22:16,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:22:16,416 INFO L705 BuchiCegarLoop]: Abstraction has 409 states and 497 transitions. [2018-11-28 11:22:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states and 497 transitions. [2018-11-28 11:22:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 386. [2018-11-28 11:22:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-11-28 11:22:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 473 transitions. [2018-11-28 11:22:16,424 INFO L728 BuchiCegarLoop]: Abstraction has 386 states and 473 transitions. [2018-11-28 11:22:16,424 INFO L608 BuchiCegarLoop]: Abstraction has 386 states and 473 transitions. [2018-11-28 11:22:16,424 INFO L442 BuchiCegarLoop]: ======== Iteration 14============ [2018-11-28 11:22:16,424 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 386 states and 473 transitions. [2018-11-28 11:22:16,426 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 11:22:16,426 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:22:16,426 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:22:16,427 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [24, 18, 15, 12, 12, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-11-28 11:22:16,427 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 11:22:16,428 INFO L794 eck$LassoCheckResult]: Stem: 10814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 10772#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 10773#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 10813#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 10817#ackermannENTRY ~m := #in~m;~n := #in~n; 10838#L15 assume !(0 == ~m); 10839#L18 assume !(0 == ~n); 10832#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10835#ackermannENTRY ~m := #in~m;~n := #in~n; 10834#L15 assume !(0 == ~m); 10833#L18 assume 0 == ~n; 10828#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10830#ackermannENTRY ~m := #in~m;~n := #in~n; 10827#L15 assume !(0 == ~m); 10829#L18 assume !(0 == ~n); 10811#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10824#ackermannENTRY ~m := #in~m;~n := #in~n; 10822#L15 assume !(0 == ~m); 10820#L18 assume 0 == ~n; 10821#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10792#ackermannENTRY ~m := #in~m;~n := #in~n; 11024#L15 assume !(0 == ~m); 11022#L18 assume !(0 == ~n); 10781#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11020#ackermannENTRY ~m := #in~m;~n := #in~n; 11053#L15 assume !(0 == ~m); 11049#L18 assume 0 == ~n; 11032#L19 call #t~ret0 := ackermann(~m - 1, 1);< 11035#ackermannENTRY ~m := #in~m;~n := #in~n; 11046#L15 assume 0 == ~m;#res := 1 + ~n; 11038#ackermannFINAL assume true; 11031#ackermannEXIT >#42#return; 11030#L19-1 #res := #t~ret0;havoc #t~ret0; 11028#ackermannFINAL assume true; 11019#ackermannEXIT >#44#return; 11013#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11014#ackermannENTRY ~m := #in~m;~n := #in~n; 11029#L15 assume 0 == ~m;#res := 1 + ~n; 11018#ackermannFINAL assume true; 11012#ackermannEXIT >#46#return; 11010#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11008#ackermannFINAL assume true; 11006#ackermannEXIT >#42#return; 10810#L19-1 #res := #t~ret0;havoc #t~ret0; 10812#ackermannFINAL assume true; 11098#ackermannEXIT >#44#return; 10775#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 10842#ackermannENTRY ~m := #in~m;~n := #in~n; 10841#L15 assume !(0 == ~m); 10840#L18 assume !(0 == ~n); 10774#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10776#ackermannENTRY ~m := #in~m;~n := #in~n; 11124#L15 assume !(0 == ~m); 10862#L18 assume !(0 == ~n); 10864#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11122#ackermannENTRY ~m := #in~m;~n := #in~n; 11129#L15 assume !(0 == ~m); 11128#L18 assume !(0 == ~n); 10786#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10849#ackermannENTRY ~m := #in~m;~n := #in~n; 10850#L15 assume !(0 == ~m); 10861#L18 assume 0 == ~n; 10784#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10788#ackermannENTRY ~m := #in~m;~n := #in~n; 11070#L15 assume 0 == ~m;#res := 1 + ~n; 10859#ackermannFINAL assume true; 11065#ackermannEXIT >#42#return; 11066#L19-1 #res := #t~ret0;havoc #t~ret0; 11090#ackermannFINAL assume true; 11087#ackermannEXIT >#44#return; 11082#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11086#ackermannENTRY ~m := #in~m;~n := #in~n; 11089#L15 assume 0 == ~m;#res := 1 + ~n; 11088#ackermannFINAL assume true; 11078#ackermannEXIT >#46#return; 11084#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11125#ackermannFINAL assume true; 11121#ackermannEXIT >#44#return; 11110#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11119#ackermannENTRY ~m := #in~m;~n := #in~n; 11127#L15 assume 0 == ~m;#res := 1 + ~n; 11126#ackermannFINAL assume true; 11108#ackermannEXIT >#46#return; 11107#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11106#ackermannFINAL assume true; 11104#ackermannEXIT >#44#return; 11100#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11102#ackermannENTRY ~m := #in~m;~n := #in~n; 11131#L15 assume 0 == ~m;#res := 1 + ~n; 11130#ackermannFINAL assume true; 11099#ackermannEXIT >#46#return; 10916#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11134#ackermannFINAL assume true; 11133#ackermannEXIT >#46#return; 10900#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10899#ackermannFINAL assume true; 10897#ackermannEXIT >#42#return; 10895#L19-1 #res := #t~ret0;havoc #t~ret0; 10894#ackermannFINAL assume true; 10893#ackermannEXIT >#44#return; 10888#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 10892#ackermannENTRY ~m := #in~m;~n := #in~n; 10891#L15 assume !(0 == ~m); 10890#L18 assume !(0 == ~n); 10884#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10887#ackermannENTRY ~m := #in~m;~n := #in~n; 10886#L15 assume !(0 == ~m); 10885#L18 assume !(0 == ~n); 10880#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10883#ackermannENTRY ~m := #in~m;~n := #in~n; 10882#L15 assume !(0 == ~m); 10881#L18 assume !(0 == ~n); 10876#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10879#ackermannENTRY ~m := #in~m;~n := #in~n; 10878#L15 assume !(0 == ~m); 10877#L18 assume !(0 == ~n); 10852#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10875#ackermannENTRY ~m := #in~m;~n := #in~n; 10873#L15 assume !(0 == ~m); 10874#L18 assume !(0 == ~n); 10846#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10853#ackermannENTRY ~m := #in~m;~n := #in~n; 10844#L15 assume !(0 == ~m); 10847#L18 assume 0 == ~n; 10983#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10987#ackermannENTRY ~m := #in~m;~n := #in~n; 11047#L15 assume !(0 == ~m); 11045#L18 assume !(0 == ~n); 10782#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11027#ackermannENTRY ~m := #in~m;~n := #in~n; 11072#L15 assume !(0 == ~m); 11069#L18 assume 0 == ~n; 10807#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10860#ackermannENTRY [2018-11-28 11:22:16,428 INFO L796 eck$LassoCheckResult]: Loop: 10860#ackermannENTRY ~m := #in~m;~n := #in~n; 10858#L15 assume !(0 == ~m); 10804#L18 assume !(0 == ~n); 10808#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10854#ackermannENTRY ~m := #in~m;~n := #in~n; 10848#L15 assume !(0 == ~m); 10843#L18 assume 0 == ~n; 10805#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10860#ackermannENTRY [2018-11-28 11:22:16,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash -410189577, now seen corresponding path program 9 times [2018-11-28 11:22:16,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:16,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:16,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:16,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:16,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 7 times [2018-11-28 11:22:16,457 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:16,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:16,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:16,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:22:16,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:22:16,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:22:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash -615721038, now seen corresponding path program 10 times [2018-11-28 11:22:16,461 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:22:16,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:22:16,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:16,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:22:16,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:22:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:22:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 527 proven. 279 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2018-11-28 11:22:16,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:22:16,626 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:22:16,633 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:22:16,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:22:16,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:22:16,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:22:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 464 proven. 365 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2018-11-28 11:22:16,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:22:16,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 11:22:16,756 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:22:16,756 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:22:16,756 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:22:16,756 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:22:16,756 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:22:16,756 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,757 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:22:16,757 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:22:16,757 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration14_Loop [2018-11-28 11:22:16,757 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:22:16,757 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:22:16,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:22:16,791 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:22:16,791 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 164 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 164 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,792 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,792 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,796 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,796 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 165 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 165 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,816 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,817 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,818 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,818 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 166 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 166 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,833 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,833 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,835 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,835 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 167 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 167 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,849 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,849 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,853 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,853 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 168 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 168 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,868 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,868 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,871 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,871 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 169 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 169 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,886 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,886 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,888 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,888 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 170 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 170 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,903 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,903 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,905 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,905 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 171 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 171 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,920 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:22:16,920 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_218cb163-ebb3-476e-8389-eb57a5817cfd/bin-2019/uautomizer/z3 Starting monitored process 172 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 172 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:22:16,937 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:22:16,937 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:22:16,973 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:22:16,973 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-5} Honda state: {ackermann_#in~m=-5} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [9, 0, 1] Nus: [0, 0] [2018-11-28 11:22:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 11:22:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-28 11:22:16,987 INFO L87 Difference]: Start difference. First operand 386 states and 473 transitions. cyclomatic complexity: 94 Second operand 11 states. [2018-11-28 11:22:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:22:17,116 INFO L93 Difference]: Finished difference Result 379 states and 464 transitions. [2018-11-28 11:22:17,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:22:17,116 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 464 transitions. [2018-11-28 11:22:17,119 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 11:22:17,119 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 0 states and 0 transitions. [2018-11-28 11:22:17,119 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 11:22:17,119 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 11:22:17,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 11:22:17,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:22:17,119 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 11:22:17,119 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 11:22:17,119 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 11:22:17,119 INFO L442 BuchiCegarLoop]: ======== Iteration 15============ [2018-11-28 11:22:17,119 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-28 11:22:17,120 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 11:22:17,120 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-28 11:22:17,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 11:22:17 BoogieIcfgContainer [2018-11-28 11:22:17,125 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-28 11:22:17,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:22:17,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:22:17,126 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:22:17,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:21:59" (3/4) ... [2018-11-28 11:22:17,129 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 11:22:17,129 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:22:17,130 INFO L168 Benchmark]: Toolchain (without parser) took 17820.95 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 556.3 MB). Free memory was 953.3 MB in the beginning and 1.3 GB in the end (delta: -307.1 MB). Peak memory consumption was 249.2 MB. Max. memory is 11.5 GB. [2018-11-28 11:22:17,131 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:22:17,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.56 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:22:17,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.87 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:22:17,132 INFO L168 Benchmark]: Boogie Preprocessor took 10.15 ms. Allocated memory is still 1.0 GB. Free memory was 942.6 MB in the beginning and 939.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:22:17,132 INFO L168 Benchmark]: RCFGBuilder took 178.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -197.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:22:17,132 INFO L168 Benchmark]: BuchiAutomizer took 17467.83 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 402.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -122.7 MB). Peak memory consumption was 279.9 MB. Max. memory is 11.5 GB. [2018-11-28 11:22:17,132 INFO L168 Benchmark]: Witness Printer took 3.89 ms. Allocated memory is still 1.6 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:22:17,134 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 137.56 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 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 19.87 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.15 ms. Allocated memory is still 1.0 GB. Free memory was 942.6 MB in the beginning and 939.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -197.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 17467.83 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 402.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -122.7 MB). Peak memory consumption was 279.9 MB. Max. memory is 11.5 GB. * Witness Printer took 3.89 ms. Allocated memory is still 1.6 GB. Free memory is still 1.3 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 16 terminating modules (10 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 5 locations. One deterministic module has affine ranking function -2 * \old(n) + 1 and consists of 4 locations. One deterministic module has affine ranking function \old(m) and consists of 11 locations. One deterministic module has affine ranking function m and consists of 12 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 25 locations. 10 modules have a trivial ranking function, the largest among these consists of 27 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 17.4s and 15 iterations. TraceHistogramMax:24. Analysis of lassos took 10.2s. Construction of modules took 1.7s. Büchi inclusion checks took 5.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 278 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 386 states and ocurred in iteration 13. Nontrivial modules had stage [3, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/21 HoareTripleCheckerStatistics: 413 SDtfs, 734 SDslu, 1218 SDs, 0 SdLazy, 4001 SolverSat, 1128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc2 concLT2 SILN6 SILU0 SILI0 SILT0 lasso4 LassoPreprocessingBenchmarks: Lassos: inital24 mio100 ax100 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf94 smp95 dnf149 smp100 tf104 neg94 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 99ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 127 LassoNonterminationAnalysisSatUnbounded: 12 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...