./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 32bit --witnessprinter.graph.data.programhash dd82318ec795f8c5ba1d6bd1e94de4995b910941 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 08:44:35,433 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 08:44:35,434 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 08:44:35,440 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 08:44:35,440 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 08:44:35,441 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 08:44:35,442 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 08:44:35,442 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 08:44:35,443 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 08:44:35,444 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 08:44:35,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 08:44:35,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 08:44:35,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 08:44:35,445 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 08:44:35,446 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 08:44:35,446 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 08:44:35,447 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 08:44:35,448 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 08:44:35,449 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 08:44:35,450 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 08:44:35,450 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 08:44:35,451 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 08:44:35,452 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 08:44:35,452 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 08:44:35,452 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 08:44:35,453 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 08:44:35,453 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 08:44:35,454 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 08:44:35,454 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 08:44:35,455 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 08:44:35,455 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 08:44:35,455 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 08:44:35,455 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 08:44:35,456 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 08:44:35,456 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 08:44:35,456 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 08:44:35,457 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-12-08 08:44:35,465 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 08:44:35,466 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 08:44:35,466 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 08:44:35,466 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 08:44:35,467 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-08 08:44:35,467 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 08:44:35,467 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 08:44:35,468 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-08 08:44:35,469 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 08:44:35,469 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-08 08:44:35,469 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 08:44:35,469 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 08:44:35,469 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-08 08:44:35,469 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 08:44:35,469 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 08:44:35,469 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-08 08:44:35,470 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-08 08:44:35,470 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2018-12-08 08:44:35,487 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 08:44:35,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 08:44:35,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 08:44:35,497 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 08:44:35,497 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 08:44:35,497 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2018-12-08 08:44:35,531 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/data/e9c9b4e54/36a817705d2445d7b740f7fd12ad224b/FLAG3bfe2d550 [2018-12-08 08:44:35,851 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 08:44:35,851 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/sv-benchmarks/c/recursive/Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2018-12-08 08:44:35,856 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/data/e9c9b4e54/36a817705d2445d7b740f7fd12ad224b/FLAG3bfe2d550 [2018-12-08 08:44:35,867 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/data/e9c9b4e54/36a817705d2445d7b740f7fd12ad224b [2018-12-08 08:44:35,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 08:44:35,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 08:44:35,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 08:44:35,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 08:44:35,873 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 08:44:35,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:35,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1782ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35, skipping insertion in model container [2018-12-08 08:44:35,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:35,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 08:44:35,889 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 08:44:35,979 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 08:44:35,981 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 08:44:35,990 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 08:44:35,998 INFO L195 MainTranslator]: Completed translation [2018-12-08 08:44:35,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35 WrapperNode [2018-12-08 08:44:35,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 08:44:35,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 08:44:35,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 08:44:35,999 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 08:44:36,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 08:44:36,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 08:44:36,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 08:44:36,016 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 08:44:36,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... [2018-12-08 08:44:36,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 08:44:36,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 08:44:36,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 08:44:36,055 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 08:44:36,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 08:44:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 08:44:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-12-08 08:44:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-12-08 08:44:36,169 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 08:44:36,169 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-08 08:44:36,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:44:36 BoogieIcfgContainer [2018-12-08 08:44:36,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 08:44:36,170 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-08 08:44:36,170 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-08 08:44:36,172 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-08 08:44:36,172 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-08 08:44:36,172 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 08.12 08:44:35" (1/3) ... [2018-12-08 08:44:36,173 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5541e6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 08.12 08:44:36, skipping insertion in model container [2018-12-08 08:44:36,173 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-08 08:44:36,173 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:44:35" (2/3) ... [2018-12-08 08:44:36,173 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5541e6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 08.12 08:44:36, skipping insertion in model container [2018-12-08 08:44:36,173 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-08 08:44:36,174 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:44:36" (3/3) ... [2018-12-08 08:44:36,174 INFO L375 chiAutomizerObserver]: Analyzing ICFG Ackermann02_false-unreach-call_true-no-overflow_true-termination.c [2018-12-08 08:44:36,210 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 08:44:36,211 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-08 08:44:36,211 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-08 08:44:36,211 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-08 08:44:36,211 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 08:44:36,211 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 08:44:36,211 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-08 08:44:36,211 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 08:44:36,211 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-08 08:44:36,219 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-12-08 08:44:36,236 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-12-08 08:44:36,236 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:36,236 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:36,241 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-12-08 08:44:36,241 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:36,241 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-08 08:44:36,241 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-12-08 08:44:36,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-12-08 08:44:36,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:36,244 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:36,244 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-12-08 08:44:36,244 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:36,251 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3#L27true assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 16#L33true assume !(main_~n~0 < 0 || main_~n~0 > 23); 6#L39true call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 11#ackermannENTRYtrue [2018-12-08 08:44:36,251 INFO L796 eck$LassoCheckResult]: Loop: 11#ackermannENTRYtrue ~m := #in~m;~n := #in~n; 18#L15true assume !(0 == ~m); 12#L18true assume !(0 == ~n); 5#L21true call #t~ret1 := ackermann(~m, ~n - 1);< 11#ackermannENTRYtrue [2018-12-08 08:44:36,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 959458, now seen corresponding path program 1 times [2018-12-08 08:44:36,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:36,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:36,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:36,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:36,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:36,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:36,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 1 times [2018-12-08 08:44:36,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:36,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:36,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:36,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:36,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:36,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:36,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091631, now seen corresponding path program 1 times [2018-12-08 08:44:36,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:36,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:36,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:36,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:36,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:36,403 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:36,403 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:36,404 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:36,404 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:36,404 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:36,404 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,404 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:36,404 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:36,404 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration1_Loop [2018-12-08 08:44:36,404 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:36,404 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:36,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,495 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:36,496 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,499 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,499 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,505 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,505 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,521 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,521 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,523 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,523 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,538 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,538 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,541 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,541 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,564 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,564 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,566 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,566 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,581 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,581 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,583 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,583 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,598 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,598 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,600 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,600 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,615 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,615 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,632 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:36,632 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,642 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,642 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,657 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,657 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,660 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,660 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7} Honda state: {ackermann_#in~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-12-08 08:44:36,705 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:36,706 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:36,706 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:36,706 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:36,706 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:36,706 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,706 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:36,706 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:36,706 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration1_Lasso [2018-12-08 08:44:36,706 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:36,706 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:36,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,794 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:36,794 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,796 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,796 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,799 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,799 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,815 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,815 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,817 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,817 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,832 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,832 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,835 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,835 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,856 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,856 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,858 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:36,858 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,874 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:36,874 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,890 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:36,890 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:36,907 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 08:44:36,908 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:36,908 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:36,908 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:36,908 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:36,908 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 08:44:36,908 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:36,908 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:36,908 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:36,908 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration1_Lasso [2018-12-08 08:44:36,908 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:36,909 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:36,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:36,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,003 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:37,006 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 08:44:37,007 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,009 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,009 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,009 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,009 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,009 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,011 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,011 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,013 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,013 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,014 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,014 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,014 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,014 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,015 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,015 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,015 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,016 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,016 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,016 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,017 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,017 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,017 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,017 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,017 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,017 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,018 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,018 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,019 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,019 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,019 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,019 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,019 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,020 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,020 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,021 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,021 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,021 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,022 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,022 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-08 08:44:37,022 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,026 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-08 08:44:37,026 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-08 08:44:37,074 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 08:44:37,089 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2018-12-08 08:44:37,089 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2018-12-08 08:44:37,090 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 08:44:37,093 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-08 08:44:37,093 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 08:44:37,094 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2018-12-08 08:44:37,096 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-08 08:44:37,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:37,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:37,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:37,195 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-08 08:44:37,196 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 5 states. [2018-12-08 08:44:37,285 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. [2018-12-08 08:44:37,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-08 08:44:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-08 08:44:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2018-12-08 08:44:37,288 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2018-12-08 08:44:37,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:37,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2018-12-08 08:44:37,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:37,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2018-12-08 08:44:37,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:37,290 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 64 transitions. [2018-12-08 08:44:37,292 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-12-08 08:44:37,297 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 30 states and 41 transitions. [2018-12-08 08:44:37,298 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2018-12-08 08:44:37,298 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2018-12-08 08:44:37,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 41 transitions. [2018-12-08 08:44:37,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:37,299 INFO L705 BuchiCegarLoop]: Abstraction has 30 states and 41 transitions. [2018-12-08 08:44:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 41 transitions. [2018-12-08 08:44:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-12-08 08:44:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 08:44:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2018-12-08 08:44:37,318 INFO L728 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2018-12-08 08:44:37,318 INFO L608 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2018-12-08 08:44:37,318 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-08 08:44:37,318 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 34 transitions. [2018-12-08 08:44:37,319 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-12-08 08:44:37,319 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:37,319 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:37,319 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:37,319 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:37,320 INFO L794 eck$LassoCheckResult]: Stem: 159#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 140#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 141#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 148#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 150#ackermannENTRY ~m := #in~m;~n := #in~n; 154#L15 assume !(0 == ~m); 165#L18 assume 0 == ~n; 143#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2018-12-08 08:44:37,320 INFO L796 eck$LassoCheckResult]: Loop: 146#ackermannENTRY ~m := #in~m;~n := #in~n; 163#L15 assume !(0 == ~m); 162#L18 assume 0 == ~n; 145#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2018-12-08 08:44:37,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 1 times [2018-12-08 08:44:37,320 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:37,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:37,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:37,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1666415, now seen corresponding path program 1 times [2018-12-08 08:44:37,326 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:37,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:37,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:37,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1185130174, now seen corresponding path program 2 times [2018-12-08 08:44:37,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:37,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:37,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:37,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:37,357 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 08:44:37,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 08:44:37,387 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:37,387 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:37,387 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:37,387 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:37,387 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:37,387 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,387 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:37,387 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:37,388 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration2_Loop [2018-12-08 08:44:37,388 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:37,388 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:37,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,435 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:37,435 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,436 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,436 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,439 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,439 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,453 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,453 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,455 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,456 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:37,470 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,470 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,472 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,472 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:37,486 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,486 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,488 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,488 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,502 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,502 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,504 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,504 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,518 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,519 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,534 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:37,534 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,537 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 08:44:37,549 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:37,550 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:37,550 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:37,550 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:37,550 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 08:44:37,550 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,550 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:37,550 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:37,550 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration2_Loop [2018-12-08 08:44:37,550 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:37,550 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:37,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,598 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:37,598 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 08:44:37,599 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,599 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,599 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,599 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,600 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,600 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,600 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,600 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,601 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,601 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,601 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,602 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,602 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,602 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,602 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,602 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,602 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,603 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,603 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,604 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,604 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,604 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,604 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,604 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,605 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,605 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,605 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,606 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,606 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,606 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,606 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,606 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,606 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,607 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,607 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,607 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,608 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,608 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,608 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,608 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,608 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,609 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,609 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,609 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,610 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,610 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,610 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,610 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,611 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,611 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,611 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,611 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,611 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,612 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:37,612 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:37,612 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:37,612 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:37,613 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:37,613 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:37,613 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:37,613 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:37,613 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:37,615 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 08:44:37,626 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 08:44:37,626 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-08 08:44:37,627 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 08:44:37,627 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 08:44:37,627 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 08:44:37,627 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = -2*ackermann_#in~n + 1 Supporting invariants [] [2018-12-08 08:44:37,627 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 08:44:37,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:37,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:37,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:37,676 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-12-08 08:44:37,676 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10 Second operand 4 states. [2018-12-08 08:44:37,725 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. [2018-12-08 08:44:37,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-08 08:44:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-08 08:44:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2018-12-08 08:44:37,726 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 4 letters. [2018-12-08 08:44:37,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:37,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 12 letters. Loop has 4 letters. [2018-12-08 08:44:37,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:37,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 8 letters. [2018-12-08 08:44:37,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:37,727 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 85 transitions. [2018-12-08 08:44:37,729 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-12-08 08:44:37,730 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 53 states and 77 transitions. [2018-12-08 08:44:37,730 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2018-12-08 08:44:37,730 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-12-08 08:44:37,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 77 transitions. [2018-12-08 08:44:37,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:37,731 INFO L705 BuchiCegarLoop]: Abstraction has 53 states and 77 transitions. [2018-12-08 08:44:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 77 transitions. [2018-12-08 08:44:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2018-12-08 08:44:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-08 08:44:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2018-12-08 08:44:37,734 INFO L728 BuchiCegarLoop]: Abstraction has 47 states and 67 transitions. [2018-12-08 08:44:37,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 08:44:37,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-08 08:44:37,736 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 4 states. [2018-12-08 08:44:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:37,759 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-12-08 08:44:37,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 08:44:37,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 68 transitions. [2018-12-08 08:44:37,761 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-12-08 08:44:37,762 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 48 states and 66 transitions. [2018-12-08 08:44:37,762 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2018-12-08 08:44:37,762 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2018-12-08 08:44:37,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 66 transitions. [2018-12-08 08:44:37,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:37,762 INFO L705 BuchiCegarLoop]: Abstraction has 48 states and 66 transitions. [2018-12-08 08:44:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 66 transitions. [2018-12-08 08:44:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2018-12-08 08:44:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 08:44:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2018-12-08 08:44:37,765 INFO L728 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2018-12-08 08:44:37,765 INFO L608 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2018-12-08 08:44:37,765 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-08 08:44:37,765 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 58 transitions. [2018-12-08 08:44:37,766 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-12-08 08:44:37,766 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:37,766 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:37,766 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:37,766 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:37,766 INFO L794 eck$LassoCheckResult]: Stem: 423#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 398#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 399#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 406#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 408#ackermannENTRY ~m := #in~m;~n := #in~n; 427#L15 assume !(0 == ~m); 429#L18 assume 0 == ~n; 413#L19 call #t~ret0 := ackermann(~m - 1, 1);< 414#ackermannENTRY [2018-12-08 08:44:37,766 INFO L796 eck$LassoCheckResult]: Loop: 414#ackermannENTRY ~m := #in~m;~n := #in~n; 416#L15 assume !(0 == ~m); 419#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; 415#L19 call #t~ret0 := ackermann(~m - 1, 1);< 414#ackermannENTRY [2018-12-08 08:44:37,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 3 times [2018-12-08 08:44:37,766 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:37,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:37,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:37,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 1 times [2018-12-08 08:44:37,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:37,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:37,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:37,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1880893067, now seen corresponding path program 1 times [2018-12-08 08:44:37,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:37,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:37,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:37,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:37,867 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:37,867 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:37,867 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:37,867 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:37,867 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:37,867 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,867 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:37,867 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:37,867 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration3_Loop [2018-12-08 08:44:37,867 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:37,867 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:37,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:37,914 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:37,914 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,915 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,916 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,918 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,918 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,933 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,933 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,935 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,935 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:37,950 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,950 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,952 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,952 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,966 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,966 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,968 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,968 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,982 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,982 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:37,984 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:37,984 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:37,998 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:37,998 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,000 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,000 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:38,014 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,014 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,016 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,016 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:38,030 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,030 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:38,046 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:38,046 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,056 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,056 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] [2018-12-08 08:44:38,132 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:38,132 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:38,132 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:38,132 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:38,132 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:38,132 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:38,132 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:38,132 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:38,133 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration3_Lasso [2018-12-08 08:44:38,133 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:38,133 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:38,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,208 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:38,209 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,210 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,210 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,212 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,212 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,227 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,227 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,229 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,229 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,243 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,243 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,245 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,245 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,260 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,260 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,262 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,262 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,277 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,277 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,279 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,279 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,294 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,294 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,296 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,296 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,312 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,312 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,314 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,314 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,329 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,329 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,331 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,331 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,346 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,346 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,348 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,348 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,363 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,363 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,365 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,365 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,380 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,380 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,382 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,382 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,397 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,397 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,399 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,399 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,414 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,414 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,416 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,416 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,431 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,431 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,433 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,433 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,447 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,447 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,463 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:38,464 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,480 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 08:44:38,481 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:38,481 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:38,481 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:38,481 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:38,481 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 08:44:38,481 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:38,482 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:38,482 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:38,482 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration3_Lasso [2018-12-08 08:44:38,482 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:38,482 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:38,483 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,550 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:38,550 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 08:44:38,550 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 [2018-12-08 08:44:38,551 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,551 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,551 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,551 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,551 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,551 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,551 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,552 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,552 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 [2018-12-08 08:44:38,552 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,552 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,552 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,552 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,553 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,553 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,553 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,553 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,553 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,554 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,554 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,554 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,554 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,555 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-12-08 08:44:38,555 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-12-08 08:44:38,560 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,560 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,561 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,561 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,561 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,561 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,561 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,561 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,562 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,562 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,562 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,563 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,563 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,563 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,563 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,563 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,563 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,563 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,564 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,564 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,564 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,564 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,564 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,565 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,565 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,565 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,565 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,566 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,566 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,566 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,566 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,566 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,566 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,566 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,567 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,567 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,567 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,567 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,568 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,568 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,568 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,568 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,568 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,568 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,568 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,569 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,569 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,569 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,569 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,569 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,570 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,570 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,570 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,570 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,570 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,571 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,571 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,571 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,571 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,571 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,571 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,571 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,571 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,572 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,572 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,572 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,572 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,572 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,572 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,572 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,573 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,573 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,573 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,573 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,574 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,574 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:38,574 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,574 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:38,574 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,574 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:38,574 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:38,575 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:38,575 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:38,575 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:38,576 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:38,576 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-08 08:44:38,576 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:38,578 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-08 08:44:38,578 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-08 08:44:38,594 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 08:44:38,614 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-12-08 08:44:38,614 INFO L444 ModelExtractionUtils]: 3 out of 11 variables were initially zero. Simplification set additionally 5 variables to zero. [2018-12-08 08:44:38,614 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 08:44:38,616 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-08 08:44:38,616 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 08:44:38,616 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~m) = 1*ackermann_#in~m Supporting invariants [1*ackermann_#in~m >= 0] [2018-12-08 08:44:38,618 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-08 08:44:38,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:38,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:38,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 08:44:38,713 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 [2018-12-08 08:44:38,713 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19 Second operand 9 states. [2018-12-08 08:44:38,846 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. [2018-12-08 08:44:38,846 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 [2018-12-08 08:44:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-08 08:44:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2018-12-08 08:44:38,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 8 letters. [2018-12-08 08:44:38,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:38,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 16 letters. Loop has 8 letters. [2018-12-08 08:44:38,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:38,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 16 letters. [2018-12-08 08:44:38,848 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:38,848 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 139 states and 195 transitions. [2018-12-08 08:44:38,850 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2018-12-08 08:44:38,851 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 139 states to 85 states and 119 transitions. [2018-12-08 08:44:38,851 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2018-12-08 08:44:38,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2018-12-08 08:44:38,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 119 transitions. [2018-12-08 08:44:38,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:38,852 INFO L705 BuchiCegarLoop]: Abstraction has 85 states and 119 transitions. [2018-12-08 08:44:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 119 transitions. [2018-12-08 08:44:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2018-12-08 08:44:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-08 08:44:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2018-12-08 08:44:38,856 INFO L728 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2018-12-08 08:44:38,856 INFO L608 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2018-12-08 08:44:38,856 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-08 08:44:38,856 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 69 states and 98 transitions. [2018-12-08 08:44:38,857 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2018-12-08 08:44:38,857 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:38,857 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:38,857 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:38,857 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:38,857 INFO L794 eck$LassoCheckResult]: Stem: 733#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 701#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 702#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 710#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 711#ackermannENTRY ~m := #in~m;~n := #in~n; 765#L15 assume !(0 == ~m); 768#L18 assume 0 == ~n; 706#L19 call #t~ret0 := ackermann(~m - 1, 1);< 714#ackermannENTRY ~m := #in~m;~n := #in~n; 746#L15 assume !(0 == ~m); 731#L18 [2018-12-08 08:44:38,857 INFO L796 eck$LassoCheckResult]: Loop: 731#L18 assume !(0 == ~n); 703#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 704#ackermannENTRY ~m := #in~m;~n := #in~n; 723#L15 assume !(0 == ~m); 731#L18 [2018-12-08 08:44:38,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1290385452, now seen corresponding path program 4 times [2018-12-08 08:44:38,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:38,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:38,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:38,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:38,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:38,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1978510, now seen corresponding path program 2 times [2018-12-08 08:44:38,863 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:38,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:38,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:38,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:38,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:38,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:38,866 INFO L82 PathProgramCache]: Analyzing trace with hash 743855841, now seen corresponding path program 2 times [2018-12-08 08:44:38,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:38,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:38,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:38,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:38,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:38,913 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:38,913 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:38,913 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:38,913 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:38,913 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:38,913 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:38,913 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:38,913 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:38,914 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration4_Loop [2018-12-08 08:44:38,914 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:38,914 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:38,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:38,973 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:38,973 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:38,976 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:38,976 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:38,978 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:38,978 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,004 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,004 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,006 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,006 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,021 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,021 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,040 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:39,040 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,286 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,286 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,302 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,302 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,303 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,304 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,319 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,319 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,320 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,321 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,336 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,336 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,339 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,340 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: [] [2018-12-08 08:44:39,453 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:39,453 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:39,453 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:39,453 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:39,453 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:39,453 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:39,453 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:39,453 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:39,453 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration4_Lasso [2018-12-08 08:44:39,453 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:39,453 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:39,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,560 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:39,561 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,563 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,563 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,564 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,564 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,579 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,579 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,581 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,581 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,595 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,595 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,597 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,597 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,612 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,612 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,613 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,613 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,628 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,628 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,629 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,630 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,645 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,645 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,647 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,647 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,671 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,671 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,673 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,673 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,688 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,688 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,691 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,691 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,706 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,706 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,708 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:39,708 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,723 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:39,723 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:39,740 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:39,740 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:39,851 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 08:44:39,853 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:39,853 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:39,853 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:39,853 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:39,853 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 08:44:39,853 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:39,853 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:39,853 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:39,853 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration4_Lasso [2018-12-08 08:44:39,853 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:39,853 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:39,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:39,956 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:39,956 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 08:44:39,956 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,956 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,957 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,957 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,957 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,957 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,957 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,957 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,957 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,958 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,958 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,958 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,958 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,958 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,958 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,958 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,958 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,959 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,959 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,959 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,959 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,959 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,959 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,959 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,960 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,960 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,960 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,960 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,961 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,961 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,961 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,961 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,961 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,961 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,961 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,962 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,962 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,962 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,963 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,963 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,963 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,963 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,963 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,963 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,964 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,964 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,964 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,964 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,964 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,965 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,965 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,965 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,965 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,965 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,966 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,966 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,966 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,966 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-08 08:44:39,966 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,969 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-08 08:44:39,969 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-08 08:44:39,981 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,981 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,981 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,981 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,982 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,982 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,982 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,982 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,982 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,983 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,983 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,983 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,983 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:39,983 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,984 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:39,984 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,984 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:39,984 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:39,984 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:39,985 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:39,985 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:39,985 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:39,985 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-08 08:44:39,985 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:39,988 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-08 08:44:39,988 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-08 08:44:40,009 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 08:44:40,022 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2018-12-08 08:44:40,022 INFO L444 ModelExtractionUtils]: 11 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-12-08 08:44:40,022 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 08:44:40,024 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-08 08:44:40,024 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 08:44:40,024 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~n) = 1*ackermann_~n Supporting invariants [1*ackermann_~n >= 0] [2018-12-08 08:44:40,025 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-08 08:44:40,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:40,122 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 [2018-12-08 08:44:40,122 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-12-08 08:44:40,140 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. [2018-12-08 08:44:40,140 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 [2018-12-08 08:44:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 08:44:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-12-08 08:44:40,141 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2018-12-08 08:44:40,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:40,141 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 08:44:40,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:40,203 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 [2018-12-08 08:44:40,203 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-12-08 08:44:40,216 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. [2018-12-08 08:44:40,217 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 [2018-12-08 08:44:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 08:44:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-12-08 08:44:40,217 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2018-12-08 08:44:40,217 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:40,217 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 08:44:40,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:40,275 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 [2018-12-08 08:44:40,275 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-12-08 08:44:40,333 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. [2018-12-08 08:44:40,333 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 [2018-12-08 08:44:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 08:44:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-12-08 08:44:40,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 4 letters. [2018-12-08 08:44:40,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:40,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 14 letters. Loop has 4 letters. [2018-12-08 08:44:40,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:40,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 8 letters. [2018-12-08 08:44:40,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:40,334 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 141 states and 191 transitions. [2018-12-08 08:44:40,336 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2018-12-08 08:44:40,337 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 141 states to 98 states and 142 transitions. [2018-12-08 08:44:40,338 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-12-08 08:44:40,338 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2018-12-08 08:44:40,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 142 transitions. [2018-12-08 08:44:40,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:40,338 INFO L705 BuchiCegarLoop]: Abstraction has 98 states and 142 transitions. [2018-12-08 08:44:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 142 transitions. [2018-12-08 08:44:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2018-12-08 08:44:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-08 08:44:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2018-12-08 08:44:40,343 INFO L728 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-12-08 08:44:40,343 INFO L608 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-12-08 08:44:40,343 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-08 08:44:40,343 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 138 transitions. [2018-12-08 08:44:40,344 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2018-12-08 08:44:40,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:40,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:40,344 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:40,344 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:40,344 INFO L794 eck$LassoCheckResult]: Stem: 1316#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1278#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1279#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1285#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1287#ackermannENTRY ~m := #in~m;~n := #in~n; 1296#L15 assume !(0 == ~m); 1373#L18 assume !(0 == ~n); 1284#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1286#ackermannENTRY ~m := #in~m;~n := #in~n; 1299#L15 assume 0 == ~m;#res := 1 + ~n; 1319#ackermannFINAL assume true; 1320#ackermannEXIT >#44#return; 1281#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1283#ackermannENTRY [2018-12-08 08:44:40,344 INFO L796 eck$LassoCheckResult]: Loop: 1283#ackermannENTRY ~m := #in~m;~n := #in~n; 1372#L15 assume !(0 == ~m); 1371#L18 assume !(0 == ~n); 1280#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1283#ackermannENTRY [2018-12-08 08:44:40,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash 804076149, now seen corresponding path program 1 times [2018-12-08 08:44:40,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:40,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:40,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:40,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 08:44:40,362 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 08:44:40,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 08:44:40,362 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 08:44:40,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 3 times [2018-12-08 08:44:40,362 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:40,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:40,396 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:40,397 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:40,397 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:40,397 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:40,397 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:40,397 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:40,397 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:40,397 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:40,397 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration5_Loop [2018-12-08 08:44:40,397 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:40,397 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:40,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,437 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:40,438 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,439 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,439 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,441 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,441 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,455 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,455 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,457 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,457 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,472 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,472 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,474 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,474 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,488 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,488 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,490 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,490 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,504 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,504 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,520 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:40,520 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,529 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,529 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,544 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,544 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,546 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,546 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,561 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,561 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,563 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,563 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:40,577 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:40,577 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:40,579 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:40,579 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-12-08 08:44:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 08:44:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 08:44:40,592 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. cyclomatic complexity: 46 Second operand 5 states. [2018-12-08 08:44:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:40,625 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2018-12-08 08:44:40,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 08:44:40,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 122 transitions. [2018-12-08 08:44:40,626 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2018-12-08 08:44:40,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 85 states and 116 transitions. [2018-12-08 08:44:40,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2018-12-08 08:44:40,627 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2018-12-08 08:44:40,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 116 transitions. [2018-12-08 08:44:40,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:40,628 INFO L705 BuchiCegarLoop]: Abstraction has 85 states and 116 transitions. [2018-12-08 08:44:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 116 transitions. [2018-12-08 08:44:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2018-12-08 08:44:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-08 08:44:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2018-12-08 08:44:40,631 INFO L728 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2018-12-08 08:44:40,631 INFO L608 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2018-12-08 08:44:40,631 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-08 08:44:40,631 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 82 states and 112 transitions. [2018-12-08 08:44:40,632 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2018-12-08 08:44:40,632 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:40,632 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:40,633 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:40,633 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:40,633 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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1485#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1486#ackermannENTRY ~m := #in~m;~n := #in~n; 1502#L15 assume !(0 == ~m); 1505#L18 assume 0 == ~n; 1489#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1490#ackermannENTRY ~m := #in~m;~n := #in~n; 1527#L15 assume !(0 == ~m); 1552#L18 assume !(0 == ~n); 1488#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1531#ackermannENTRY ~m := #in~m;~n := #in~n; 1557#L15 assume !(0 == ~m); 1541#L18 assume 0 == ~n; 1491#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1492#ackermannENTRY ~m := #in~m;~n := #in~n; 1525#L15 assume 0 == ~m;#res := 1 + ~n; 1523#ackermannFINAL assume true; 1517#ackermannEXIT >#42#return; 1519#L19-1 #res := #t~ret0;havoc #t~ret0; 1533#ackermannFINAL assume true; 1530#ackermannEXIT >#44#return; 1480#L21-1 [2018-12-08 08:44:40,633 INFO L796 eck$LassoCheckResult]: Loop: 1480#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1529#ackermannENTRY ~m := #in~m;~n := #in~n; 1534#L15 assume !(0 == ~m); 1535#L18 assume 0 == ~n; 1521#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1522#ackermannENTRY ~m := #in~m;~n := #in~n; 1549#L15 assume !(0 == ~m); 1548#L18 assume !(0 == ~n); 1483#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1547#ackermannENTRY ~m := #in~m;~n := #in~n; 1545#L15 assume !(0 == ~m); 1542#L18 assume 0 == ~n; 1521#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1522#ackermannENTRY ~m := #in~m;~n := #in~n; 1549#L15 assume 0 == ~m;#res := 1 + ~n; 1550#ackermannFINAL assume true; 1551#ackermannEXIT >#42#return; 1519#L19-1 #res := #t~ret0;havoc #t~ret0; 1533#ackermannFINAL assume true; 1530#ackermannEXIT >#44#return; 1480#L21-1 [2018-12-08 08:44:40,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1914958677, now seen corresponding path program 1 times [2018-12-08 08:44:40,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:40,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:40,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:40,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:40,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -190850389, now seen corresponding path program 1 times [2018-12-08 08:44:40,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:40,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:40,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:40,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1249696767, now seen corresponding path program 1 times [2018-12-08 08:44:40,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:40,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:40,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:40,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-08 08:44:40,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:40,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:40,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:40,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-08 08:44:40,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:40,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-12-08 08:44:40,985 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:40,985 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:40,985 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:40,985 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:40,986 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:40,986 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:40,986 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:40,986 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:40,986 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration6_Loop [2018-12-08 08:44:40,986 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:40,986 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:40,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:40,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,026 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:41,026 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:41,039 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:41,039 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:41,041 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:41,041 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:41,056 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:41,056 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:41,072 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:41,072 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:41,659 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 08:44:41,660 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:41,660 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:41,660 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:41,660 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:41,660 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 08:44:41,660 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:41,660 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:41,660 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:41,660 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration6_Loop [2018-12-08 08:44:41,660 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:41,660 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:41,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:41,700 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:41,700 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 08:44:41,700 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:41,701 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:41,701 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:41,701 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:41,701 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:41,701 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:41,701 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:41,701 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:41,702 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:41,702 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:41,702 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:41,702 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:41,702 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:41,702 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:41,702 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:41,703 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:41,703 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:41,703 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:41,703 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:41,703 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:41,703 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:41,703 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:41,703 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:41,703 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:41,704 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:41,704 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:41,704 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:41,704 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:41,705 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:41,705 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:41,705 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:41,705 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:41,705 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:41,705 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:41,705 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:41,706 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 08:44:41,707 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 08:44:41,707 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 08:44:41,707 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 08:44:41,707 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 08:44:41,707 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 08:44:41,707 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~m) = 1*ackermann_~m Supporting invariants [] [2018-12-08 08:44:41,707 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 08:44:41,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:41,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:41,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 08:44:41,810 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 [2018-12-08 08:44:41,810 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2018-12-08 08:44:41,929 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. [2018-12-08 08:44:41,930 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 [2018-12-08 08:44:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-08 08:44:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 31 transitions. [2018-12-08 08:44:41,930 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 31 transitions. Stem has 23 letters. Loop has 20 letters. [2018-12-08 08:44:41,931 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:41,931 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 08:44:41,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:41,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:41,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 08:44:42,029 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 [2018-12-08 08:44:42,029 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2018-12-08 08:44:42,250 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. [2018-12-08 08:44:42,250 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 [2018-12-08 08:44:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-08 08:44:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 44 transitions. [2018-12-08 08:44:42,251 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 20 letters. [2018-12-08 08:44:42,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:42,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 43 letters. Loop has 20 letters. [2018-12-08 08:44:42,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:42,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 40 letters. [2018-12-08 08:44:42,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:42,253 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 426 transitions. [2018-12-08 08:44:42,257 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 47 [2018-12-08 08:44:42,261 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 227 states and 351 transitions. [2018-12-08 08:44:42,261 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 128 [2018-12-08 08:44:42,261 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 130 [2018-12-08 08:44:42,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 227 states and 351 transitions. [2018-12-08 08:44:42,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:42,262 INFO L705 BuchiCegarLoop]: Abstraction has 227 states and 351 transitions. [2018-12-08 08:44:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states and 351 transitions. [2018-12-08 08:44:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2018-12-08 08:44:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-12-08 08:44:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 327 transitions. [2018-12-08 08:44:42,276 INFO L728 BuchiCegarLoop]: Abstraction has 212 states and 327 transitions. [2018-12-08 08:44:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 08:44:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2018-12-08 08:44:42,276 INFO L87 Difference]: Start difference. First operand 212 states and 327 transitions. Second operand 21 states. [2018-12-08 08:44:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:43,062 INFO L93 Difference]: Finished difference Result 458 states and 602 transitions. [2018-12-08 08:44:43,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-08 08:44:43,062 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 458 states and 602 transitions. [2018-12-08 08:44:43,065 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 49 [2018-12-08 08:44:43,069 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 458 states to 410 states and 537 transitions. [2018-12-08 08:44:43,069 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 277 [2018-12-08 08:44:43,070 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 310 [2018-12-08 08:44:43,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 410 states and 537 transitions. [2018-12-08 08:44:43,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:43,071 INFO L705 BuchiCegarLoop]: Abstraction has 410 states and 537 transitions. [2018-12-08 08:44:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states and 537 transitions. [2018-12-08 08:44:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2018-12-08 08:44:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-12-08 08:44:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 462 transitions. [2018-12-08 08:44:43,084 INFO L728 BuchiCegarLoop]: Abstraction has 341 states and 462 transitions. [2018-12-08 08:44:43,084 INFO L608 BuchiCegarLoop]: Abstraction has 341 states and 462 transitions. [2018-12-08 08:44:43,084 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-08 08:44:43,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 341 states and 462 transitions. [2018-12-08 08:44:43,086 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 34 [2018-12-08 08:44:43,086 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:43,086 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:43,087 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:43,087 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:43,088 INFO L794 eck$LassoCheckResult]: Stem: 3362#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 3333#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 3334#ackermannENTRY ~m := #in~m;~n := #in~n; 3405#L15 assume !(0 == ~m); 3404#L18 assume 0 == ~n; 3336#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3397#ackermannENTRY ~m := #in~m;~n := #in~n; 3402#L15 assume !(0 == ~m); 3411#L18 assume !(0 == ~n); 3382#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3407#ackermannENTRY ~m := #in~m;~n := #in~n; 3388#L15 assume !(0 == ~m); 3381#L18 assume 0 == ~n; 3383#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3347#ackermannENTRY ~m := #in~m;~n := #in~n; 3480#L15 assume 0 == ~m;#res := 1 + ~n; 3494#ackermannFINAL assume true; 3415#ackermannEXIT >#42#return; 3416#L19-1 #res := #t~ret0;havoc #t~ret0; 3622#ackermannFINAL assume true; 3620#ackermannEXIT >#44#return; 3316#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3337#ackermannENTRY ~m := #in~m;~n := #in~n; 3644#L15 assume !(0 == ~m); 3352#L18 assume !(0 == ~n); 3312#L21 [2018-12-08 08:44:43,088 INFO L796 eck$LassoCheckResult]: Loop: 3312#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3318#ackermannENTRY ~m := #in~m;~n := #in~n; 3348#L15 assume !(0 == ~m); 3363#L18 assume !(0 == ~n); 3312#L21 [2018-12-08 08:44:43,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:43,088 INFO L82 PathProgramCache]: Analyzing trace with hash 229970726, now seen corresponding path program 2 times [2018-12-08 08:44:43,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:43,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:43,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:43,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-08 08:44:43,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:43,127 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:43,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:44:43,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 08:44:43,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:44:43,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-08 08:44:43,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:43,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-08 08:44:43,165 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 08:44:43,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2228500, now seen corresponding path program 4 times [2018-12-08 08:44:43,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:43,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:43,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:43,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,201 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:43,201 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:43,201 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:43,201 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:43,201 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:43,201 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:43,201 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:43,201 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:43,201 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration7_Loop [2018-12-08 08:44:43,201 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:43,201 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:43,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,260 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:43,260 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:43,261 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,261 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,263 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,263 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,278 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,278 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,279 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,279 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,294 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,294 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,296 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,296 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,310 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,310 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,312 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,312 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,326 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,326 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,329 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,329 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,343 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,343 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,361 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:43,361 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,497 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,497 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] [2018-12-08 08:44:43,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 08:44:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-08 08:44:43,511 INFO L87 Difference]: Start difference. First operand 341 states and 462 transitions. cyclomatic complexity: 134 Second operand 7 states. [2018-12-08 08:44:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:43,578 INFO L93 Difference]: Finished difference Result 255 states and 320 transitions. [2018-12-08 08:44:43,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 08:44:43,578 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 255 states and 320 transitions. [2018-12-08 08:44:43,580 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 17 [2018-12-08 08:44:43,581 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 255 states to 229 states and 287 transitions. [2018-12-08 08:44:43,581 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 182 [2018-12-08 08:44:43,581 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 182 [2018-12-08 08:44:43,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 287 transitions. [2018-12-08 08:44:43,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:43,582 INFO L705 BuchiCegarLoop]: Abstraction has 229 states and 287 transitions. [2018-12-08 08:44:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 287 transitions. [2018-12-08 08:44:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 212. [2018-12-08 08:44:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-12-08 08:44:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 268 transitions. [2018-12-08 08:44:43,587 INFO L728 BuchiCegarLoop]: Abstraction has 212 states and 268 transitions. [2018-12-08 08:44:43,587 INFO L608 BuchiCegarLoop]: Abstraction has 212 states and 268 transitions. [2018-12-08 08:44:43,587 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-08 08:44:43,587 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 212 states and 268 transitions. [2018-12-08 08:44:43,588 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 17 [2018-12-08 08:44:43,589 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:43,589 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:43,590 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:43,590 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 08:44:43,590 INFO L794 eck$LassoCheckResult]: Stem: 4037#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 4011#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 4012#ackermannENTRY ~m := #in~m;~n := #in~n; 4064#L15 assume !(0 == ~m); 4058#L18 assume 0 == ~n; 4049#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4057#ackermannENTRY ~m := #in~m;~n := #in~n; 4055#L15 assume !(0 == ~m); 4056#L18 assume !(0 == ~n); 4042#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4047#ackermannENTRY ~m := #in~m;~n := #in~n; 4048#L15 assume !(0 == ~m); 4041#L18 assume 0 == ~n; 4043#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4021#ackermannENTRY ~m := #in~m;~n := #in~n; 4110#L15 assume !(0 == ~m); 4108#L18 assume !(0 == ~n); 4104#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4105#ackermannENTRY ~m := #in~m;~n := #in~n; 4120#L15 assume !(0 == ~m); 4118#L18 assume 0 == ~n; 4112#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4115#ackermannENTRY ~m := #in~m;~n := #in~n; 4119#L15 assume 0 == ~m;#res := 1 + ~n; 4117#ackermannFINAL assume true; 4111#ackermannEXIT >#42#return; 4109#L19-1 #res := #t~ret0;havoc #t~ret0; 4107#ackermannFINAL assume true; 4103#ackermannEXIT >#44#return; 4100#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4101#ackermannENTRY ~m := #in~m;~n := #in~n; 4106#L15 assume 0 == ~m;#res := 1 + ~n; 4102#ackermannFINAL assume true; 4099#ackermannEXIT >#46#return; 4098#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4097#ackermannFINAL assume true; 4086#ackermannEXIT >#42#return; 4077#L19-1 #res := #t~ret0;havoc #t~ret0; 4075#ackermannFINAL assume true; 4070#ackermannEXIT >#44#return; 4035#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4066#ackermannENTRY ~m := #in~m;~n := #in~n; 4053#L15 assume !(0 == ~m); 4051#L18 assume !(0 == ~n); 4004#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4005#ackermannENTRY [2018-12-08 08:44:43,590 INFO L796 eck$LassoCheckResult]: Loop: 4005#ackermannENTRY ~m := #in~m;~n := #in~n; 4162#L15 assume !(0 == ~m); 4156#L18 assume !(0 == ~n); 4001#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4005#ackermannENTRY [2018-12-08 08:44:43,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2042677982, now seen corresponding path program 1 times [2018-12-08 08:44:43,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:43,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:43,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:43,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:43,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 5 times [2018-12-08 08:44:43,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:43,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:43,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:43,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -997227989, now seen corresponding path program 2 times [2018-12-08 08:44:43,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:43,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:43,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:43,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:43,650 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:43,650 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:43,650 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:43,650 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:43,650 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:43,650 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:43,650 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:43,650 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:43,650 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration8_Loop [2018-12-08 08:44:43,650 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:43,650 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:43,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,664 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:43,695 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:43,695 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,697 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,697 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,699 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,699 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,713 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,713 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,730 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:43,730 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,738 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,738 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,753 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,753 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,755 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,755 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,769 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,769 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,771 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,772 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,786 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,786 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,788 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,788 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,802 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,802 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,804 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,804 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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) Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:43,819 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,819 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,821 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,821 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:43,835 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:43,835 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:43,837 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:43,837 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-1} Honda state: {ackermann_#in~m=-1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-12-08 08:44:44,159 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:44,159 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:44,159 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:44,159 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:44,159 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:44,159 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:44,159 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:44,159 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:44,159 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration8_Lasso [2018-12-08 08:44:44,159 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:44,160 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:44,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,215 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:44,215 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,217 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,217 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,218 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,218 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,233 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,233 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,235 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,235 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,250 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,250 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,252 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,252 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,266 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,266 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,268 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,268 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,282 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,282 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,284 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,284 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,298 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,298 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,300 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,300 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,314 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,314 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,316 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,316 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,331 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,331 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,334 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,334 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,348 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,348 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,350 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,350 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,364 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,364 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,366 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,366 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,380 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,380 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,382 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,382 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,396 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,396 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,398 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,398 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,413 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,413 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,415 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:44,415 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,429 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:44,429 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:44,445 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:44,445 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:44,460 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 08:44:44,461 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:44,461 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:44,461 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:44,462 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:44,462 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 08:44:44,462 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:44,462 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:44,462 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:44,462 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration8_Lasso [2018-12-08 08:44:44,462 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:44,462 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:44,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:44,538 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:44,538 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 08:44:44,538 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,538 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,538 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,539 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,539 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,539 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,539 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,539 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,539 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,539 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,540 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,540 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,540 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,540 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,540 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,540 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,540 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,540 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,541 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,541 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,541 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,541 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,541 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,541 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,542 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,542 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,542 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,542 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 [2018-12-08 08:44:44,542 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,543 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,543 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-08 08:44:44,543 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,544 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-08 08:44:44,544 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-08 08:44:44,550 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,551 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,551 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,551 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,551 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,552 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,552 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,552 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,552 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,552 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,553 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,553 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,553 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,553 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,553 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,553 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,553 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,554 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,554 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,554 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 [2018-12-08 08:44:44,554 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,554 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,554 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,555 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,555 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,555 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,555 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,555 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,555 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 [2018-12-08 08:44:44,556 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,556 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,556 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,556 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,556 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,556 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,557 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,557 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,557 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,557 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,558 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,558 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,558 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,558 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,558 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,558 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,559 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,559 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,559 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,559 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,560 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,560 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,560 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,560 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,560 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,560 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,561 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,561 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,561 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,561 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,561 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,562 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,562 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,562 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,562 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,563 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,563 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,563 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,563 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,563 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,563 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,564 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,564 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,564 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,565 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,565 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,565 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,565 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,565 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,565 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,566 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,566 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,566 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,566 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,567 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,567 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 08:44:44,567 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,567 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 08:44:44,567 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,567 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 08:44:44,567 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 08:44:44,568 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 08:44:44,568 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 08:44:44,568 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 08:44:44,569 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 08:44:44,569 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-08 08:44:44,569 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 08:44:44,570 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-08 08:44:44,571 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-08 08:44:44,582 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 08:44:44,590 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2018-12-08 08:44:44,590 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 3 variables to zero. [2018-12-08 08:44:44,590 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 08:44:44,592 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-08 08:44:44,592 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 08:44:44,592 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2018-12-08 08:44:44,594 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-08 08:44:44,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:44,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:44,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:44,853 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 [2018-12-08 08:44:44,853 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-12-08 08:44:44,918 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. [2018-12-08 08:44:44,918 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 [2018-12-08 08:44:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 08:44:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-08 08:44:44,918 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-08 08:44:44,919 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:44,919 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 08:44:44,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:44,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:45,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:45,131 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 [2018-12-08 08:44:45,131 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-12-08 08:44:45,193 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. [2018-12-08 08:44:45,193 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 [2018-12-08 08:44:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 08:44:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-08 08:44:45,193 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-08 08:44:45,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:45,194 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 08:44:45,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:45,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:45,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:44:45,417 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 [2018-12-08 08:44:45,417 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-12-08 08:44:46,138 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. [2018-12-08 08:44:46,138 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 [2018-12-08 08:44:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 08:44:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 72 transitions. [2018-12-08 08:44:46,139 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-08 08:44:46,139 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:46,139 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 51 letters. Loop has 4 letters. [2018-12-08 08:44:46,139 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:46,139 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 47 letters. Loop has 8 letters. [2018-12-08 08:44:46,140 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 08:44:46,140 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 506 states and 647 transitions. [2018-12-08 08:44:46,143 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:46,144 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 506 states to 331 states and 405 transitions. [2018-12-08 08:44:46,144 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 266 [2018-12-08 08:44:46,144 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 270 [2018-12-08 08:44:46,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 331 states and 405 transitions. [2018-12-08 08:44:46,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:46,145 INFO L705 BuchiCegarLoop]: Abstraction has 331 states and 405 transitions. [2018-12-08 08:44:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states and 405 transitions. [2018-12-08 08:44:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 293. [2018-12-08 08:44:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-12-08 08:44:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 360 transitions. [2018-12-08 08:44:46,151 INFO L728 BuchiCegarLoop]: Abstraction has 293 states and 360 transitions. [2018-12-08 08:44:46,151 INFO L608 BuchiCegarLoop]: Abstraction has 293 states and 360 transitions. [2018-12-08 08:44:46,151 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-12-08 08:44:46,151 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 293 states and 360 transitions. [2018-12-08 08:44:46,152 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:46,152 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:46,152 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:46,153 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:46,153 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:46,153 INFO L794 eck$LassoCheckResult]: Stem: 5855#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 5829#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 5830#ackermannENTRY ~m := #in~m;~n := #in~n; 5878#L15 assume !(0 == ~m); 5877#L18 assume 0 == ~n; 5871#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5876#ackermannENTRY ~m := #in~m;~n := #in~n; 5874#L15 assume !(0 == ~m); 5875#L18 assume !(0 == ~n); 5839#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5873#ackermannENTRY ~m := #in~m;~n := #in~n; 5866#L15 assume !(0 == ~m); 5868#L18 assume 0 == ~n; 5838#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5840#ackermannENTRY ~m := #in~m;~n := #in~n; 5948#L15 assume !(0 == ~m); 5946#L18 assume !(0 == ~n); 5941#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5942#ackermannENTRY ~m := #in~m;~n := #in~n; 5959#L15 assume !(0 == ~m); 5955#L18 assume 0 == ~n; 5950#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5953#ackermannENTRY ~m := #in~m;~n := #in~n; 5962#L15 assume 0 == ~m;#res := 1 + ~n; 5956#ackermannFINAL assume true; 5949#ackermannEXIT >#42#return; 5947#L19-1 #res := #t~ret0;havoc #t~ret0; 5945#ackermannFINAL assume true; 5940#ackermannEXIT >#44#return; 5937#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5938#ackermannENTRY ~m := #in~m;~n := #in~n; 5943#L15 assume 0 == ~m;#res := 1 + ~n; 5939#ackermannFINAL assume true; 5936#ackermannEXIT >#46#return; 5935#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5932#ackermannFINAL assume true; 5931#ackermannEXIT >#42#return; 5911#L19-1 #res := #t~ret0;havoc #t~ret0; 5909#ackermannFINAL assume true; 5898#ackermannEXIT >#44#return; 5899#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5981#ackermannENTRY ~m := #in~m;~n := #in~n; 5988#L15 assume !(0 == ~m); 5989#L18 assume !(0 == ~n); 6011#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5825#ackermannENTRY ~m := #in~m;~n := #in~n; 6066#L15 assume !(0 == ~m); 6060#L18 assume 0 == ~n; 6056#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5837#ackermannENTRY [2018-12-08 08:44:46,153 INFO L796 eck$LassoCheckResult]: Loop: 5837#ackermannENTRY ~m := #in~m;~n := #in~n; 6061#L15 assume !(0 == ~m); 6062#L18 assume !(0 == ~n); 5836#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6070#ackermannENTRY ~m := #in~m;~n := #in~n; 6067#L15 assume !(0 == ~m); 6065#L18 assume 0 == ~n; 5835#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5837#ackermannENTRY [2018-12-08 08:44:46,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:46,154 INFO L82 PathProgramCache]: Analyzing trace with hash -997228084, now seen corresponding path program 3 times [2018-12-08 08:44:46,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:46,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:46,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:46,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-08 08:44:46,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:46,224 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:46,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 08:44:46,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-08 08:44:46,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:44:46,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-08 08:44:46,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:46,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-08 08:44:46,268 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 08:44:46,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:46,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 2 times [2018-12-08 08:44:46,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:46,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:46,330 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:46,331 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:46,331 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:46,331 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:46,331 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:46,331 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:46,331 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:46,331 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:46,331 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration9_Loop [2018-12-08 08:44:46,331 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:46,331 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:46,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:46,366 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:46,366 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:46,367 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,368 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,369 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,369 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,383 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,383 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,385 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,385 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,404 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,405 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,420 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,420 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,422 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,422 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,437 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,437 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,439 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,439 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,453 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,453 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,455 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,455 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,469 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,469 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,486 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:46,486 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,494 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,494 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:46,509 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:46,509 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:46,511 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:46,511 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-12-08 08:44:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 08:44:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-12-08 08:44:46,524 INFO L87 Difference]: Start difference. First operand 293 states and 360 transitions. cyclomatic complexity: 74 Second operand 15 states. [2018-12-08 08:44:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:46,791 INFO L93 Difference]: Finished difference Result 301 states and 365 transitions. [2018-12-08 08:44:46,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-08 08:44:46,791 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 301 states and 365 transitions. [2018-12-08 08:44:46,793 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:46,794 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 301 states to 297 states and 361 transitions. [2018-12-08 08:44:46,794 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 236 [2018-12-08 08:44:46,794 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 236 [2018-12-08 08:44:46,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 297 states and 361 transitions. [2018-12-08 08:44:46,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:46,794 INFO L705 BuchiCegarLoop]: Abstraction has 297 states and 361 transitions. [2018-12-08 08:44:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states and 361 transitions. [2018-12-08 08:44:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 277. [2018-12-08 08:44:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-12-08 08:44:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 339 transitions. [2018-12-08 08:44:46,800 INFO L728 BuchiCegarLoop]: Abstraction has 277 states and 339 transitions. [2018-12-08 08:44:46,800 INFO L608 BuchiCegarLoop]: Abstraction has 277 states and 339 transitions. [2018-12-08 08:44:46,800 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-12-08 08:44:46,800 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 277 states and 339 transitions. [2018-12-08 08:44:46,801 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:46,802 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:46,802 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:46,802 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 8, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:46,802 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:46,803 INFO L794 eck$LassoCheckResult]: Stem: 6665#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 6635#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 6636#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; 6654#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6648#ackermannENTRY ~m := #in~m;~n := #in~n; 6656#L15 assume !(0 == ~m); 6669#L18 assume !(0 == ~n); 6638#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);< 6644#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); 6662#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 [2018-12-08 08:44:46,803 INFO L796 eck$LassoCheckResult]: Loop: 6716#ackermannENTRY ~m := #in~m;~n := #in~n; 6711#L15 assume !(0 == ~m); 6657#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 [2018-12-08 08:44:46,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash 258460313, now seen corresponding path program 4 times [2018-12-08 08:44:46,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:46,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:46,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:46,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-08 08:44:46,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:46,901 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:46,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 08:44:46,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 08:44:46,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:44:46,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-08 08:44:46,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:46,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-08 08:44:46,942 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 08:44:46,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 3 times [2018-12-08 08:44:46,942 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:46,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:46,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:46,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:47,003 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:47,003 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:47,003 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:47,003 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:47,003 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:47,003 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:47,003 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:47,003 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:47,003 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration10_Loop [2018-12-08 08:44:47,003 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:47,003 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:47,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,036 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:47,036 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:47,039 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,039 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,041 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,041 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,055 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,055 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,057 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,057 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,071 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,071 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,073 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,073 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,087 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,087 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,089 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,089 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,104 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,104 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,106 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,106 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,120 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,120 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,121 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,121 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,136 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,136 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,137 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,137 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,152 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,152 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,167 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:47,167 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,212 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,212 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] [2018-12-08 08:44:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 08:44:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-12-08 08:44:47,225 INFO L87 Difference]: Start difference. First operand 277 states and 339 transitions. cyclomatic complexity: 69 Second operand 17 states. [2018-12-08 08:44:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:47,589 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2018-12-08 08:44:47,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-08 08:44:47,589 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 322 states and 390 transitions. [2018-12-08 08:44:47,591 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-12-08 08:44:47,593 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 322 states to 318 states and 386 transitions. [2018-12-08 08:44:47,593 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 248 [2018-12-08 08:44:47,593 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 248 [2018-12-08 08:44:47,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 318 states and 386 transitions. [2018-12-08 08:44:47,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:47,593 INFO L705 BuchiCegarLoop]: Abstraction has 318 states and 386 transitions. [2018-12-08 08:44:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states and 386 transitions. [2018-12-08 08:44:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 304. [2018-12-08 08:44:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-08 08:44:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2018-12-08 08:44:47,599 INFO L728 BuchiCegarLoop]: Abstraction has 304 states and 372 transitions. [2018-12-08 08:44:47,599 INFO L608 BuchiCegarLoop]: Abstraction has 304 states and 372 transitions. [2018-12-08 08:44:47,599 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-12-08 08:44:47,599 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 304 states and 372 transitions. [2018-12-08 08:44:47,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:47,600 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:47,600 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:47,601 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [11, 9, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 08:44:47,601 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:47,601 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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 7465#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 7466#ackermannENTRY ~m := #in~m;~n := #in~n; 7515#L15 assume !(0 == ~m); 7516#L18 assume 0 == ~n; 7506#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7511#ackermannENTRY ~m := #in~m;~n := #in~n; 7509#L15 assume !(0 == ~m); 7510#L18 assume !(0 == ~n); 7479#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7508#ackermannENTRY ~m := #in~m;~n := #in~n; 7500#L15 assume !(0 == ~m); 7499#L18 assume 0 == ~n; 7468#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7480#ackermannENTRY ~m := #in~m;~n := #in~n; 7543#L15 assume !(0 == ~m); 7544#L18 assume !(0 == ~n); 7473#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7540#ackermannENTRY ~m := #in~m;~n := #in~n; 7541#L15 assume !(0 == ~m); 7535#L18 assume 0 == ~n; 7536#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7478#ackermannENTRY ~m := #in~m;~n := #in~n; 7688#L15 assume 0 == ~m;#res := 1 + ~n; 7685#ackermannFINAL assume true; 7678#ackermannEXIT >#42#return; 7677#L19-1 #res := #t~ret0;havoc #t~ret0; 7676#ackermannFINAL assume true; 7675#ackermannEXIT >#44#return; 7641#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7642#ackermannENTRY ~m := #in~m;~n := #in~n; 7674#L15 assume 0 == ~m;#res := 1 + ~n; 7673#ackermannFINAL assume true; 7640#ackermannEXIT >#46#return; 7637#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 7634#ackermannFINAL assume true; 7625#ackermannEXIT >#42#return; 7626#L19-1 #res := #t~ret0;havoc #t~ret0; 7631#ackermannFINAL assume true; 7572#ackermannEXIT >#44#return; 7459#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7528#ackermannENTRY ~m := #in~m;~n := #in~n; 7525#L15 assume !(0 == ~m); 7527#L18 assume !(0 == ~n); 7458#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7460#ackermannENTRY ~m := #in~m;~n := #in~n; 7580#L15 assume !(0 == ~m); 7579#L18 assume !(0 == ~n); 7461#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7464#ackermannENTRY ~m := #in~m;~n := #in~n; 7482#L15 assume !(0 == ~m); 7496#L18 assume !(0 == ~n); 7547#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7557#ackermannENTRY ~m := #in~m;~n := #in~n; 7546#L15 assume !(0 == ~m); 7549#L18 assume 0 == ~n; 7487#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7534#ackermannENTRY [2018-12-08 08:44:47,601 INFO L796 eck$LassoCheckResult]: Loop: 7534#ackermannENTRY ~m := #in~m;~n := #in~n; 7530#L15 assume !(0 == ~m); 7486#L18 assume !(0 == ~n); 7490#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7558#ackermannENTRY ~m := #in~m;~n := #in~n; 7550#L15 assume !(0 == ~m); 7529#L18 assume 0 == ~n; 7489#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7534#ackermannENTRY [2018-12-08 08:44:47,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash 807724262, now seen corresponding path program 5 times [2018-12-08 08:44:47,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:47,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:47,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:47,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:47,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:47,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 4 times [2018-12-08 08:44:47,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:47,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:47,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:47,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:47,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:47,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1221239647, now seen corresponding path program 6 times [2018-12-08 08:44:47,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:47,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:47,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:47,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:47,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 131 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-12-08 08:44:47,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:47,704 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:47,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 08:44:47,726 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-12-08 08:44:47,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:44:47,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 128 proven. 70 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 08:44:47,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:47,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 18 [2018-12-08 08:44:47,841 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:47,841 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:47,841 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:47,841 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:47,842 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:47,842 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:47,842 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:47,842 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:47,842 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration11_Loop [2018-12-08 08:44:47,842 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:47,842 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:47,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:47,872 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:47,872 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 133 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:47,874 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,875 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,876 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,876 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,891 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,891 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,893 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,893 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,908 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,908 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,909 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,909 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,924 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,924 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,926 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,926 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,940 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,940 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,942 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,942 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,956 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,956 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,958 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,958 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,972 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,972 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:47,974 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:47,974 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:47,990 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:47,990 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,006 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:48,006 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,014 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,014 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] [2018-12-08 08:44:48,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 08:44:48,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-08 08:44:48,028 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. cyclomatic complexity: 75 Second operand 18 states. [2018-12-08 08:44:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:48,256 INFO L93 Difference]: Finished difference Result 341 states and 411 transitions. [2018-12-08 08:44:48,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 08:44:48,257 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 411 transitions. [2018-12-08 08:44:48,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:48,261 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 241 states and 286 transitions. [2018-12-08 08:44:48,261 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 172 [2018-12-08 08:44:48,261 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 172 [2018-12-08 08:44:48,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 241 states and 286 transitions. [2018-12-08 08:44:48,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:48,261 INFO L705 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-12-08 08:44:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states and 286 transitions. [2018-12-08 08:44:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-12-08 08:44:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-12-08 08:44:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2018-12-08 08:44:48,266 INFO L728 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-12-08 08:44:48,267 INFO L608 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-12-08 08:44:48,267 INFO L442 BuchiCegarLoop]: ======== Iteration 12============ [2018-12-08 08:44:48,267 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 241 states and 286 transitions. [2018-12-08 08:44:48,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:48,268 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:48,268 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:48,269 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [22, 16, 15, 10, 10, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-12-08 08:44:48,269 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:48,269 INFO L794 eck$LassoCheckResult]: Stem: 8379#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 8353#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 8354#ackermannENTRY ~m := #in~m;~n := #in~n; 8405#L15 assume !(0 == ~m); 8585#L18 assume !(0 == ~n); 8373#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8402#ackermannENTRY ~m := #in~m;~n := #in~n; 8401#L15 assume !(0 == ~m); 8400#L18 assume 0 == ~n; 8397#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8399#ackermannENTRY ~m := #in~m;~n := #in~n; 8396#L15 assume !(0 == ~m); 8398#L18 assume !(0 == ~n); 8365#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8502#ackermannENTRY ~m := #in~m;~n := #in~n; 8571#L15 assume !(0 == ~m); 8389#L18 assume 0 == ~n; 8364#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8366#ackermannENTRY ~m := #in~m;~n := #in~n; 8457#L15 assume !(0 == ~m); 8455#L18 assume !(0 == ~n); 8452#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8453#ackermannENTRY ~m := #in~m;~n := #in~n; 8468#L15 assume !(0 == ~m); 8467#L18 assume 0 == ~n; 8464#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8426#ackermannENTRY ~m := #in~m;~n := #in~n; 8475#L15 assume 0 == ~m;#res := 1 + ~n; 8473#ackermannFINAL assume true; 8463#ackermannEXIT >#42#return; 8460#L19-1 #res := #t~ret0;havoc #t~ret0; 8458#ackermannFINAL assume true; 8451#ackermannEXIT >#44#return; 8439#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8440#ackermannENTRY ~m := #in~m;~n := #in~n; 8450#L15 assume 0 == ~m;#res := 1 + ~n; 8449#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; 8520#ackermannFINAL assume true; 8501#ackermannEXIT >#44#return; 8445#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8446#ackermannENTRY ~m := #in~m;~n := #in~n; 8539#L15 assume !(0 == ~m); 8534#L18 assume !(0 == ~n); 8496#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8498#ackermannENTRY ~m := #in~m;~n := #in~n; 8562#L15 assume !(0 == ~m); 8561#L18 assume !(0 == ~n); 8541#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8542#ackermannENTRY ~m := #in~m;~n := #in~n; 8556#L15 assume !(0 == ~m); 8555#L18 assume !(0 == ~n); 8359#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8552#ackermannENTRY ~m := #in~m;~n := #in~n; 8551#L15 assume !(0 == ~m); 8550#L18 assume 0 == ~n; 8413#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8472#ackermannENTRY ~m := #in~m;~n := #in~n; 8474#L15 assume 0 == ~m;#res := 1 + ~n; 8471#ackermannFINAL assume true; 8411#ackermannEXIT >#42#return; 8415#L19-1 #res := #t~ret0;havoc #t~ret0; 8549#ackermannFINAL assume true; 8547#ackermannEXIT >#44#return; 8545#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8360#ackermannENTRY ~m := #in~m;~n := #in~n; 8565#L15 assume 0 == ~m;#res := 1 + ~n; 8564#ackermannFINAL assume true; 8543#ackermannEXIT >#46#return; 8536#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8554#ackermannFINAL assume true; 8540#ackermannEXIT >#44#return; 8383#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8538#ackermannENTRY ~m := #in~m;~n := #in~n; 8380#L15 assume 0 == ~m;#res := 1 + ~n; 8385#ackermannFINAL assume true; 8535#ackermannEXIT >#46#return; 8533#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8522#ackermannFINAL assume true; 8495#ackermannEXIT >#44#return; 8491#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8494#ackermannENTRY ~m := #in~m;~n := #in~n; 8512#L15 assume 0 == ~m;#res := 1 + ~n; 8511#ackermannFINAL assume true; 8489#ackermannEXIT >#46#return; 8487#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8485#ackermannFINAL assume true; 8444#ackermannEXIT >#46#return; 8436#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8432#ackermannFINAL assume true; 8422#ackermannEXIT >#42#return; 8372#L19-1 #res := #t~ret0;havoc #t~ret0; 8375#ackermannFINAL assume true; 8581#ackermannEXIT >#44#return; 8349#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8410#ackermannENTRY ~m := #in~m;~n := #in~n; 8408#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; 8370#L15 assume !(0 == ~m); 8386#L18 assume !(0 == ~n); 8351#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8352#ackermannENTRY ~m := #in~m;~n := #in~n; 8371#L15 assume !(0 == ~m); 8575#L18 assume !(0 == ~n); 8427#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8447#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; 8488#L15 assume !(0 == ~m); 8486#L18 assume !(0 == ~n); 8482#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8484#ackermannENTRY ~m := #in~m;~n := #in~n; 8514#L15 assume !(0 == ~m); 8513#L18 assume 0 == ~n; 8412#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8363#ackermannENTRY [2018-12-08 08:44:48,270 INFO L796 eck$LassoCheckResult]: Loop: 8363#ackermannENTRY ~m := #in~m;~n := #in~n; 8500#L15 assume !(0 == ~m); 8470#L18 assume !(0 == ~n); 8362#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8466#ackermannENTRY ~m := #in~m;~n := #in~n; 8461#L15 assume !(0 == ~m); 8459#L18 assume 0 == ~n; 8361#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8363#ackermannENTRY [2018-12-08 08:44:48,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 286526941, now seen corresponding path program 7 times [2018-12-08 08:44:48,270 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:48,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:48,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:48,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:48,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 495 proven. 85 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-12-08 08:44:48,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:48,415 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:48,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:48,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 495 proven. 85 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-12-08 08:44:48,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:48,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-12-08 08:44:48,476 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 08:44:48,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 5 times [2018-12-08 08:44:48,476 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:48,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:48,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:48,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:48,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:48,550 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:48,550 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:48,550 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:48,550 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:48,550 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:48,550 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:48,550 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:48,550 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:48,550 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration12_Loop [2018-12-08 08:44:48,550 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:48,550 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:48,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,552 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:48,583 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:48,583 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 143 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:48,585 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,585 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,587 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,587 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,601 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,601 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,603 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,603 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,618 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,618 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,619 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,619 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,634 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,634 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,636 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,636 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,650 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,650 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,652 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,652 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,666 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,666 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,668 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,669 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,683 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,683 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,685 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,685 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,699 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:48,699 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:48,715 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:48,715 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:48,723 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:48,724 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] [2018-12-08 08:44:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-08 08:44:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2018-12-08 08:44:48,737 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. cyclomatic complexity: 52 Second operand 25 states. [2018-12-08 08:44:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:49,476 INFO L93 Difference]: Finished difference Result 396 states and 482 transitions. [2018-12-08 08:44:49,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-08 08:44:49,476 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 396 states and 482 transitions. [2018-12-08 08:44:49,479 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:49,481 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 396 states to 392 states and 478 transitions. [2018-12-08 08:44:49,481 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 308 [2018-12-08 08:44:49,481 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2018-12-08 08:44:49,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 392 states and 478 transitions. [2018-12-08 08:44:49,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:49,482 INFO L705 BuchiCegarLoop]: Abstraction has 392 states and 478 transitions. [2018-12-08 08:44:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states and 478 transitions. [2018-12-08 08:44:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 347. [2018-12-08 08:44:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-12-08 08:44:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 420 transitions. [2018-12-08 08:44:49,489 INFO L728 BuchiCegarLoop]: Abstraction has 347 states and 420 transitions. [2018-12-08 08:44:49,489 INFO L608 BuchiCegarLoop]: Abstraction has 347 states and 420 transitions. [2018-12-08 08:44:49,489 INFO L442 BuchiCegarLoop]: ======== Iteration 13============ [2018-12-08 08:44:49,489 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 347 states and 420 transitions. [2018-12-08 08:44:49,491 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:49,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:49,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:49,492 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [23, 17, 15, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-12-08 08:44:49,492 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:49,493 INFO L794 eck$LassoCheckResult]: Stem: 9525#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 9496#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 9497#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);< 9538#ackermannENTRY ~m := #in~m;~n := #in~n; 9536#L15 assume !(0 == ~m); 9533#L18 assume 0 == ~n; 9535#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9515#ackermannENTRY ~m := #in~m;~n := #in~n; 9616#L15 assume !(0 == ~m); 9603#L18 assume !(0 == ~n); 9590#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9591#ackermannENTRY ~m := #in~m;~n := #in~n; 9614#L15 assume !(0 == ~m); 9611#L18 assume 0 == ~n; 9600#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9602#ackermannENTRY ~m := #in~m;~n := #in~n; 9606#L15 assume 0 == ~m;#res := 1 + ~n; 9604#ackermannFINAL assume true; 9599#ackermannEXIT >#42#return; 9598#L19-1 #res := #t~ret0;havoc #t~ret0; 9597#ackermannFINAL assume true; 9589#ackermannEXIT >#44#return; 9586#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9587#ackermannENTRY ~m := #in~m;~n := #in~n; 9596#L15 assume 0 == ~m;#res := 1 + ~n; 9594#ackermannFINAL assume true; 9585#ackermannEXIT >#46#return; 9580#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9576#ackermannFINAL assume true; 9571#ackermannEXIT >#42#return; 9569#L19-1 #res := #t~ret0;havoc #t~ret0; 9626#ackermannFINAL assume true; 9627#ackermannEXIT >#44#return; 9555#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9557#ackermannENTRY ~m := #in~m;~n := #in~n; 9554#L15 assume !(0 == ~m); 9556#L18 assume !(0 == ~n); 9750#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9492#ackermannENTRY ~m := #in~m;~n := #in~n; 9772#L15 assume !(0 == ~m); 9769#L18 assume !(0 == ~n); 9767#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9768#ackermannENTRY ~m := #in~m;~n := #in~n; 9789#L15 assume !(0 == ~m); 9788#L18 assume !(0 == ~n); 9505#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9624#ackermannENTRY ~m := #in~m;~n := #in~n; 9623#L15 assume !(0 == ~m); 9622#L18 assume 0 == ~n; 9564#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9574#ackermannENTRY ~m := #in~m;~n := #in~n; 9736#L15 assume 0 == ~m;#res := 1 + ~n; 9613#ackermannFINAL assume true; 9563#ackermannEXIT >#42#return; 9567#L19-1 #res := #t~ret0;havoc #t~ret0; 9786#ackermannFINAL assume true; 9784#ackermannEXIT >#44#return; 9776#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9782#ackermannENTRY ~m := #in~m;~n := #in~n; 9785#L15 assume 0 == ~m;#res := 1 + ~n; 9783#ackermannFINAL assume true; 9774#ackermannEXIT >#46#return; 9773#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9771#ackermannFINAL assume true; 9766#ackermannEXIT >#44#return; 9758#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9764#ackermannENTRY ~m := #in~m;~n := #in~n; 9770#L15 assume 0 == ~m;#res := 1 + ~n; 9765#ackermannFINAL assume true; 9757#ackermannEXIT >#46#return; 9755#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9754#ackermannFINAL assume true; 9749#ackermannEXIT >#44#return; 9745#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9747#ackermannENTRY ~m := #in~m;~n := #in~n; 9752#L15 assume 0 == ~m;#res := 1 + ~n; 9748#ackermannFINAL assume true; 9744#ackermannEXIT >#46#return; 9675#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9628#ackermannFINAL assume true; 9629#ackermannEXIT >#46#return; 9581#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9577#ackermannFINAL assume true; 9572#ackermannEXIT >#42#return; 9573#L19-1 #res := #t~ret0;havoc #t~ret0; 9655#ackermannFINAL assume true; 9654#ackermannEXIT >#44#return; 9646#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9650#ackermannENTRY ~m := #in~m;~n := #in~n; 9649#L15 assume !(0 == ~m); 9648#L18 assume !(0 == ~n); 9642#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9645#ackermannENTRY ~m := #in~m;~n := #in~n; 9644#L15 assume !(0 == ~m); 9643#L18 assume !(0 == ~n); 9638#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9641#ackermannENTRY ~m := #in~m;~n := #in~n; 9640#L15 assume !(0 == ~m); 9639#L18 assume !(0 == ~n); 9595#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9636#ackermannENTRY ~m := #in~m;~n := #in~n; 9637#L15 assume !(0 == ~m); 9621#L18 assume !(0 == ~n); 9559#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9592#ackermannENTRY ~m := #in~m;~n := #in~n; 9584#L15 assume !(0 == ~m); 9579#L18 assume 0 == ~n; 9522#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9575#ackermannENTRY ~m := #in~m;~n := #in~n; 9793#L15 assume !(0 == ~m); 9521#L18 assume !(0 == ~n); 9523#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9738#ackermannENTRY ~m := #in~m;~n := #in~n; 9815#L15 assume !(0 == ~m); 9561#L18 assume 0 == ~n; 9562#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9511#ackermannENTRY [2018-12-08 08:44:49,493 INFO L796 eck$LassoCheckResult]: Loop: 9511#ackermannENTRY ~m := #in~m;~n := #in~n; 9612#L15 assume !(0 == ~m); 9610#L18 assume !(0 == ~n); 9510#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9588#ackermannENTRY ~m := #in~m;~n := #in~n; 9582#L15 assume !(0 == ~m); 9578#L18 assume 0 == ~n; 9509#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9511#ackermannENTRY [2018-12-08 08:44:49,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1393549654, now seen corresponding path program 8 times [2018-12-08 08:44:49,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:49,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:49,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:49,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:49,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 546 proven. 104 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-12-08 08:44:49,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:49,679 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:49,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:44:49,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 08:44:49,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:44:49,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 546 proven. 104 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-12-08 08:44:49,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:49,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-12-08 08:44:49,744 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 08:44:49,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:49,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 6 times [2018-12-08 08:44:49,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:49,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:49,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:49,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:49,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:49,811 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:49,811 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:49,811 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:49,811 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:49,811 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:49,811 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:49,811 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:49,811 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:49,811 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration13_Loop [2018-12-08 08:44:49,811 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:49,811 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:49,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:49,842 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:49,842 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 153 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:49,845 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,845 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,846 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,847 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,861 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,861 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,863 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,863 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,878 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,878 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,880 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,880 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,894 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,894 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,896 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,897 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,911 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,911 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,913 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,913 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,927 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,927 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,929 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,929 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,943 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:49,943 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:49,959 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:49,959 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:49,998 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:49,998 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:50,013 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:50,013 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:50,015 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:50,015 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-12-08 08:44:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-08 08:44:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2018-12-08 08:44:50,028 INFO L87 Difference]: Start difference. First operand 347 states and 420 transitions. cyclomatic complexity: 80 Second operand 27 states. [2018-12-08 08:44:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:50,891 INFO L93 Difference]: Finished difference Result 413 states and 501 transitions. [2018-12-08 08:44:50,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-08 08:44:50,891 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 413 states and 501 transitions. [2018-12-08 08:44:50,893 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-12-08 08:44:50,894 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 413 states to 409 states and 497 transitions. [2018-12-08 08:44:50,894 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 316 [2018-12-08 08:44:50,895 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 316 [2018-12-08 08:44:50,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 409 states and 497 transitions. [2018-12-08 08:44:50,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 08:44:50,895 INFO L705 BuchiCegarLoop]: Abstraction has 409 states and 497 transitions. [2018-12-08 08:44:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states and 497 transitions. [2018-12-08 08:44:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 386. [2018-12-08 08:44:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-12-08 08:44:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 473 transitions. [2018-12-08 08:44:50,900 INFO L728 BuchiCegarLoop]: Abstraction has 386 states and 473 transitions. [2018-12-08 08:44:50,900 INFO L608 BuchiCegarLoop]: Abstraction has 386 states and 473 transitions. [2018-12-08 08:44:50,900 INFO L442 BuchiCegarLoop]: ======== Iteration 14============ [2018-12-08 08:44:50,900 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 386 states and 473 transitions. [2018-12-08 08:44:50,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-08 08:44:50,901 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 08:44:50,901 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 08:44:50,901 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [24, 18, 15, 12, 12, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-12-08 08:44:50,901 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-12-08 08:44:50,902 INFO L794 eck$LassoCheckResult]: Stem: 10811#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#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 10783#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 10784#ackermannENTRY ~m := #in~m;~n := #in~n; 10841#L15 assume !(0 == ~m); 10842#L18 assume !(0 == ~n); 10835#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10838#ackermannENTRY ~m := #in~m;~n := #in~n; 10837#L15 assume !(0 == ~m); 10836#L18 assume 0 == ~n; 10831#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10833#ackermannENTRY ~m := #in~m;~n := #in~n; 10830#L15 assume !(0 == ~m); 10832#L18 assume !(0 == ~n); 10823#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10827#ackermannENTRY ~m := #in~m;~n := #in~n; 10828#L15 assume !(0 == ~m); 10822#L18 assume 0 == ~n; 10786#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10796#ackermannENTRY ~m := #in~m;~n := #in~n; 10873#L15 assume !(0 == ~m); 10869#L18 assume !(0 == ~n); 10799#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11114#ackermannENTRY ~m := #in~m;~n := #in~n; 11124#L15 assume !(0 == ~m); 11123#L18 assume 0 == ~n; 11122#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10793#ackermannENTRY ~m := #in~m;~n := #in~n; 11127#L15 assume 0 == ~m;#res := 1 + ~n; 11126#ackermannFINAL assume true; 11121#ackermannEXIT >#42#return; 11120#L19-1 #res := #t~ret0;havoc #t~ret0; 11119#ackermannFINAL assume true; 11118#ackermannEXIT >#44#return; 11106#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11107#ackermannENTRY ~m := #in~m;~n := #in~n; 11116#L15 assume 0 == ~m;#res := 1 + ~n; 11115#ackermannFINAL assume true; 11105#ackermannEXIT >#46#return; 11102#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11099#ackermannFINAL assume true; 11074#ackermannEXIT >#42#return; 11073#L19-1 #res := #t~ret0;havoc #t~ret0; 11072#ackermannFINAL assume true; 11071#ackermannEXIT >#44#return; 10894#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11067#ackermannENTRY ~m := #in~m;~n := #in~n; 11086#L15 assume !(0 == ~m); 10893#L18 assume !(0 == ~n); 10875#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10883#ackermannENTRY ~m := #in~m;~n := #in~n; 10879#L15 assume !(0 == ~m); 10880#L18 assume !(0 == ~n); 10871#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10874#ackermannENTRY ~m := #in~m;~n := #in~n; 10870#L15 assume !(0 == ~m); 10872#L18 assume !(0 == ~n); 10862#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10865#ackermannENTRY ~m := #in~m;~n := #in~n; 10860#L15 assume !(0 == ~m); 10864#L18 assume 0 == ~n; 11050#L19 call #t~ret0 := ackermann(~m - 1, 1);< 11052#ackermannENTRY ~m := #in~m;~n := #in~n; 11056#L15 assume 0 == ~m;#res := 1 + ~n; 11053#ackermannFINAL assume true; 11049#ackermannEXIT >#42#return; 11047#L19-1 #res := #t~ret0;havoc #t~ret0; 11044#ackermannFINAL assume true; 11042#ackermannEXIT >#44#return; 11034#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11038#ackermannENTRY ~m := #in~m;~n := #in~n; 11043#L15 assume 0 == ~m;#res := 1 + ~n; 11039#ackermannFINAL assume true; 11030#ackermannEXIT >#46#return; 11037#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11088#ackermannFINAL assume true; 11087#ackermannEXIT >#44#return; 11016#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11025#ackermannENTRY ~m := #in~m;~n := #in~n; 11064#L15 assume 0 == ~m;#res := 1 + ~n; 11063#ackermannFINAL assume true; 11014#ackermannEXIT >#46#return; 11021#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11084#ackermannFINAL assume true; 11081#ackermannEXIT >#44#return; 11077#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11079#ackermannENTRY ~m := #in~m;~n := #in~n; 11083#L15 assume 0 == ~m;#res := 1 + ~n; 11080#ackermannFINAL assume true; 11076#ackermannEXIT >#46#return; 10921#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11069#ackermannFINAL assume true; 11065#ackermannEXIT >#46#return; 10912#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10905#ackermannFINAL assume true; 10903#ackermannEXIT >#42#return; 10901#L19-1 #res := #t~ret0;havoc #t~ret0; 10900#ackermannFINAL assume true; 10899#ackermannEXIT >#44#return; 10775#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 10897#ackermannENTRY ~m := #in~m;~n := #in~n; 10896#L15 assume !(0 == ~m); 10895#L18 assume !(0 == ~n); 10774#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10777#ackermannENTRY ~m := #in~m;~n := #in~n; 10973#L15 assume !(0 == ~m); 10972#L18 assume !(0 == ~n); 10969#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10970#ackermannENTRY ~m := #in~m;~n := #in~n; 10982#L15 assume !(0 == ~m); 10981#L18 assume !(0 == ~n); 10978#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10979#ackermannENTRY ~m := #in~m;~n := #in~n; 10986#L15 assume !(0 == ~m); 10985#L18 assume !(0 == ~n); 10805#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10804#ackermannENTRY ~m := #in~m;~n := #in~n; 10806#L15 assume !(0 == ~m); 11094#L18 assume !(0 == ~n); 10816#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10998#ackermannENTRY ~m := #in~m;~n := #in~n; 10997#L15 assume !(0 == ~m); 10995#L18 assume 0 == ~n; 10787#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10855#ackermannENTRY ~m := #in~m;~n := #in~n; 10853#L15 assume !(0 == ~m); 10854#L18 assume !(0 == ~n); 10798#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11062#ackermannENTRY ~m := #in~m;~n := #in~n; 11057#L15 assume !(0 == ~m); 11054#L18 assume 0 == ~n; 10780#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10856#ackermannENTRY [2018-12-08 08:44:50,902 INFO L796 eck$LassoCheckResult]: Loop: 10856#ackermannENTRY ~m := #in~m;~n := #in~n; 11055#L15 assume !(0 == ~m); 10807#L18 assume !(0 == ~n); 10778#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10779#ackermannENTRY ~m := #in~m;~n := #in~n; 11068#L15 assume !(0 == ~m); 10852#L18 assume 0 == ~n; 10782#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10856#ackermannENTRY [2018-12-08 08:44:50,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:50,902 INFO L82 PathProgramCache]: Analyzing trace with hash -410189577, now seen corresponding path program 9 times [2018-12-08 08:44:50,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:50,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:50,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:50,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:50,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:50,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:50,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 7 times [2018-12-08 08:44:50,916 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:50,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:50,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:50,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:44:50,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 08:44:50,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:44:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash -615721038, now seen corresponding path program 10 times [2018-12-08 08:44:50,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:44:50,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:44:50,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:50,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:44:50,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:44:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:44:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 527 proven. 279 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2018-12-08 08:44:51,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:44:51,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:44:51,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 08:44:51,056 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 08:44:51,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:44:51,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:44:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 464 proven. 365 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2018-12-08 08:44:51,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:44:51,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-08 08:44:51,143 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 08:44:51,143 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 08:44:51,143 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 08:44:51,143 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 08:44:51,143 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 08:44:51,143 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:51,143 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 08:44:51,143 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 08:44:51,143 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann02_false-unreach-call_true-no-overflow_true-termination.c_Iteration14_Loop [2018-12-08 08:44:51,143 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 08:44:51,143 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 08:44:51,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 08:44:51,178 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 08:44:51,178 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/bin-2019/uautomizer/z3 Starting monitored process 163 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 08:44:51,179 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,179 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,181 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,181 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,195 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,196 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,198 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,198 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,221 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,221 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,223 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,223 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,238 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,238 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,241 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,241 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,264 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,264 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,265 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,265 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,280 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,280 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,282 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,282 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,296 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,296 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,298 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,298 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_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,313 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 08:44:51,313 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bf28d29-5aa4-4498-b05c-66dd8d381098/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 [2018-12-08 08:44:51,330 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 08:44:51,330 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 08:44:51,366 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 08:44:51,366 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] [2018-12-08 08:44:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 08:44:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-12-08 08:44:51,379 INFO L87 Difference]: Start difference. First operand 386 states and 473 transitions. cyclomatic complexity: 94 Second operand 11 states. [2018-12-08 08:44:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:44:51,528 INFO L93 Difference]: Finished difference Result 379 states and 464 transitions. [2018-12-08 08:44:51,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 08:44:51,528 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 464 transitions. [2018-12-08 08:44:51,530 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-08 08:44:51,530 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 0 states and 0 transitions. [2018-12-08 08:44:51,530 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-08 08:44:51,530 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-08 08:44:51,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-08 08:44:51,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-08 08:44:51,530 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 08:44:51,530 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 08:44:51,530 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 08:44:51,530 INFO L442 BuchiCegarLoop]: ======== Iteration 15============ [2018-12-08 08:44:51,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-08 08:44:51,530 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-08 08:44:51,530 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-08 08:44:51,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 08.12 08:44:51 BoogieIcfgContainer [2018-12-08 08:44:51,534 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-08 08:44:51,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 08:44:51,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 08:44:51,535 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 08:44:51,535 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:44:36" (3/4) ... [2018-12-08 08:44:51,537 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-08 08:44:51,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 08:44:51,538 INFO L168 Benchmark]: Toolchain (without parser) took 15668.78 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 487.1 MB). Free memory was 961.3 MB in the beginning and 1.5 GB in the end (delta: -512.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.19 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.42 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: Boogie Preprocessor took 38.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -128.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: RCFGBuilder took 114.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: BuchiAutomizer took 15364.81 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 402.7 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -409.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:44:51,539 INFO L168 Benchmark]: Witness Printer took 2.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:44:51,540 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.19 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 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 17.42 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -128.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 114.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 15364.81 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 402.7 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -409.9 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 2.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 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 15.3s and 15 iterations. TraceHistogramMax:24. Analysis of lassos took 8.6s. Construction of modules took 1.6s. Büchi inclusion checks took 4.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.0s 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, 1.6s 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: 72ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 126 LassoNonterminationAnalysisSatUnbounded: 12 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...