./Ultimate.py --spec /storage/repos/svcomp/c/properties/termination.prp --file /storage/repos/svcomp/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i /storage/repos/svcomp/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 69d872c0500c15c11d149393bc821769e86dd3ec .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 23:15:36,379 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 23:15:36,380 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 23:15:36,392 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 23:15:36,393 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 23:15:36,394 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 23:15:36,395 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 23:15:36,397 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 23:15:36,399 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 23:15:36,400 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 23:15:36,404 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 23:15:36,404 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 23:15:36,405 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 23:15:36,408 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 23:15:36,412 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 23:15:36,413 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 23:15:36,414 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 23:15:36,419 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 23:15:36,423 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 23:15:36,428 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 23:15:36,429 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 23:15:36,431 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 23:15:36,437 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 23:15:36,440 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 23:15:36,440 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 23:15:36,441 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 23:15:36,442 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 23:15:36,443 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 23:15:36,444 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 23:15:36,445 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 23:15:36,445 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 23:15:36,446 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 23:15:36,446 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 23:15:36,446 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 23:15:36,448 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 23:15:36,448 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 23:15:36,449 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-28 23:15:36,465 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 23:15:36,465 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 23:15:36,466 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 23:15:36,467 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 23:15:36,467 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 23:15:36,467 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 23:15:36,467 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 23:15:36,467 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 23:15:36,468 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 23:15:36,469 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 23:15:36,469 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 23:15:36,469 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 23:15:36,469 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 23:15:36,469 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 23:15:36,469 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 23:15:36,470 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 23:15:36,470 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 23:15:36,471 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 23:15:36,471 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 23:15:36,471 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 23:15:36,471 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 23:15:36,471 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 23:15:36,471 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 23:15:36,472 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 23:15:36,472 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 23:15:36,472 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 23:15:36,472 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 23:15:36,472 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 23:15:36,475 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 23:15:36,475 INFO L133 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d872c0500c15c11d149393bc821769e86dd3ec [2018-11-28 23:15:36,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 23:15:36,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 23:15:36,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 23:15:36,529 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 23:15:36,530 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 23:15:36,530 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c [2018-11-28 23:15:36,583 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4354201/e4f35398568941f493bee0881f04a64d/FLAG9c470f62a [2018-11-28 23:15:37,046 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 23:15:37,048 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/termination-numeric/Ackermann01_true-termination_true-no-overflow.c [2018-11-28 23:15:37,056 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4354201/e4f35398568941f493bee0881f04a64d/FLAG9c470f62a [2018-11-28 23:15:37,377 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4354201/e4f35398568941f493bee0881f04a64d [2018-11-28 23:15:37,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 23:15:37,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 23:15:37,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 23:15:37,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 23:15:37,388 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 23:15:37,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a828241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37, skipping insertion in model container [2018-11-28 23:15:37,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 23:15:37,415 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 23:15:37,587 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 23:15:37,593 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 23:15:37,619 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 23:15:37,638 INFO L195 MainTranslator]: Completed translation [2018-11-28 23:15:37,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37 WrapperNode [2018-11-28 23:15:37,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 23:15:37,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 23:15:37,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 23:15:37,640 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 23:15:37,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 23:15:37,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 23:15:37,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 23:15:37,685 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 23:15:37,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... [2018-11-28 23:15:37,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 23:15:37,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 23:15:37,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 23:15:37,714 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 23:15:37,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 23:15:37,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 23:15:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-11-28 23:15:37,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-11-28 23:15:38,200 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 23:15:38,200 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-28 23:15:38,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:15:38 BoogieIcfgContainer [2018-11-28 23:15:38,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 23:15:38,202 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 23:15:38,202 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 23:15:38,206 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 23:15:38,207 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 23:15:38,207 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 11:15:37" (1/3) ... [2018-11-28 23:15:38,209 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6748ebab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:15:38, skipping insertion in model container [2018-11-28 23:15:38,209 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 23:15:38,209 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:15:37" (2/3) ... [2018-11-28 23:15:38,209 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6748ebab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:15:38, skipping insertion in model container [2018-11-28 23:15:38,209 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 23:15:38,209 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:15:38" (3/3) ... [2018-11-28 23:15:38,217 INFO L375 chiAutomizerObserver]: Analyzing ICFG Ackermann01_true-termination_true-no-overflow.c [2018-11-28 23:15:38,278 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 23:15:38,279 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 23:15:38,279 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 23:15:38,279 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 23:15:38,279 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 23:15:38,279 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 23:15:38,280 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 23:15:38,280 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 23:15:38,280 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 23:15:38,296 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-11-28 23:15:38,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 23:15:38,324 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:38,324 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:38,333 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-28 23:15:38,334 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:38,334 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 23:15:38,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-11-28 23:15:38,339 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 23:15:38,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:38,340 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:38,340 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-28 23:15:38,340 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:38,350 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3#L27true assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 12#L31true assume !(main_~n~0 < 0 || main_~n~0 > 23); 17#L34true call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 9#ackermannENTRYtrue [2018-11-28 23:15:38,351 INFO L796 eck$LassoCheckResult]: Loop: 9#ackermannENTRYtrue ~m := #in~m;~n := #in~n; 16#L15true assume !(0 == ~m); 10#L18true assume !(0 == ~n); 5#L21true call #t~ret1 := ackermann(~m, ~n - 1);< 9#ackermannENTRYtrue [2018-11-28 23:15:38,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash 959458, now seen corresponding path program 1 times [2018-11-28 23:15:38,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:38,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:38,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:38,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 1 times [2018-11-28 23:15:38,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:38,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:38,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:38,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:38,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:38,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091631, now seen corresponding path program 1 times [2018-11-28 23:15:38,486 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:38,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:38,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:38,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:38,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:38,706 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:38,707 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:38,708 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:38,708 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:38,708 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:38,708 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:38,709 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:38,709 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:38,709 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration1_Loop [2018-11-28 23:15:38,709 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:38,709 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:38,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:38,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,264 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:39,265 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,271 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,271 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,280 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,280 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,304 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,304 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,309 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,309 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,331 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,332 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,336 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,336 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,375 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,376 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,379 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,379 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,406 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,407 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,410 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,410 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,432 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,433 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,436 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,436 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,458 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,459 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,484 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:39,484 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,504 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,504 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,526 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:39,526 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:39,537 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:39,537 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7} Honda state: {ackermann_#in~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 23:15:39,690 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-28 23:15:39,734 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:39,735 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:39,735 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:39,735 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:39,735 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:39,735 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:39,736 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:39,736 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:39,736 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration1_Lasso [2018-11-28 23:15:39,736 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:39,736 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:39,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,743 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,903 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:39,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:40,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:40,531 WARN L180 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-28 23:15:40,812 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-28 23:15:40,818 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:40,818 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:40,823 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:40,823 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,829 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:40,829 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,850 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:40,851 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:40,854 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:40,854 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,875 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:40,875 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:40,879 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:40,879 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,901 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:40,901 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:40,904 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:40,904 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,929 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:40,930 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,956 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:40,957 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:40,980 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 23:15:40,982 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:40,982 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:40,982 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:40,982 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:40,982 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 23:15:40,983 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:40,983 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:40,983 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:40,983 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration1_Lasso [2018-11-28 23:15:40,983 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:40,983 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:40,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:40,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:40,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:40,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,016 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:41,381 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:41,386 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 23:15:41,388 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:41,389 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:41,390 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:41,390 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:41,390 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:41,390 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:41,393 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:41,393 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:41,397 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:41,398 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:41,399 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:41,400 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:41,400 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:41,401 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:41,401 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:41,402 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:41,402 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:41,403 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:41,403 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:41,406 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:41,406 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:41,406 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:41,406 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:41,406 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:41,407 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:41,407 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:41,408 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:41,410 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:41,410 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:41,410 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:41,411 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:41,411 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:41,411 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:41,411 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:41,412 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:41,413 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:41,413 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:41,414 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:41,414 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:41,414 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 23:15:41,414 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:41,423 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 23:15:41,423 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 23:15:41,576 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 23:15:41,634 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2018-11-28 23:15:41,634 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2018-11-28 23:15:41,643 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 23:15:41,659 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 23:15:41,659 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 23:15:41,660 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2018-11-28 23:15:41,689 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 23:15:41,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:41,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:41,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:15:41,966 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 23:15:41,968 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 5 states. [2018-11-28 23:15:42,167 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 5 states. Result 49 states and 64 transitions. Complement of second has 13 states. [2018-11-28 23:15:42,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 23:15:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2018-11-28 23:15:42,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2018-11-28 23:15:42,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:42,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2018-11-28 23:15:42,181 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:42,181 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2018-11-28 23:15:42,181 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:42,182 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 64 transitions. [2018-11-28 23:15:42,189 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 23:15:42,198 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 30 states and 41 transitions. [2018-11-28 23:15:42,200 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2018-11-28 23:15:42,200 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2018-11-28 23:15:42,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 41 transitions. [2018-11-28 23:15:42,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:42,204 INFO L705 BuchiCegarLoop]: Abstraction has 30 states and 41 transitions. [2018-11-28 23:15:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 41 transitions. [2018-11-28 23:15:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-11-28 23:15:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 23:15:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2018-11-28 23:15:42,241 INFO L728 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2018-11-28 23:15:42,241 INFO L608 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2018-11-28 23:15:42,241 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 23:15:42,241 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 34 transitions. [2018-11-28 23:15:42,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-28 23:15:42,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:42,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:42,244 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:42,244 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:42,244 INFO L794 eck$LassoCheckResult]: Stem: 159#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 140#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 141#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 148#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 152#ackermannENTRY ~m := #in~m;~n := #in~n; 154#L15 assume !(0 == ~m); 165#L18 assume 0 == ~n; 143#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2018-11-28 23:15:42,244 INFO L796 eck$LassoCheckResult]: Loop: 146#ackermannENTRY ~m := #in~m;~n := #in~n; 164#L15 assume !(0 == ~m); 162#L18 assume 0 == ~n; 145#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2018-11-28 23:15:42,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 1 times [2018-11-28 23:15:42,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:42,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:42,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:42,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1666415, now seen corresponding path program 1 times [2018-11-28 23:15:42,270 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:42,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:42,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:42,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:42,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:42,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1185130174, now seen corresponding path program 2 times [2018-11-28 23:15:42,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:42,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:42,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:42,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:42,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:15:42,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 23:15:42,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 23:15:42,455 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:42,456 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:42,456 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:42,456 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:42,456 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:42,457 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,457 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:42,457 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:42,457 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration2_Loop [2018-11-28 23:15:42,457 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:42,458 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:42,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,602 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:42,602 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,607 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:42,607 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:42,614 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:42,614 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,634 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:42,635 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:42,637 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:42,637 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,659 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:42,660 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:42,663 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:42,663 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,686 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:42,686 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:42,689 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:42,689 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,710 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:42,711 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:42,714 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:42,714 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,735 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:42,735 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,760 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:42,760 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:42,766 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 23:15:42,783 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:42,783 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:42,783 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:42,784 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:42,784 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 23:15:42,784 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:42,784 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:42,784 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:42,784 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration2_Loop [2018-11-28 23:15:42,784 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:42,784 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:42,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,795 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:42,896 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:42,897 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 23:15:42,897 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,898 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,898 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,899 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,899 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,899 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,899 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,900 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,901 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:42,901 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,902 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,902 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,902 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,902 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,902 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,903 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,903 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,904 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:42,905 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,905 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,905 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,906 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,906 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,906 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,906 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,906 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,907 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:42,908 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,908 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,909 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,909 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,909 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,909 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,910 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,910 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,911 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:42,911 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,912 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,912 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,912 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,912 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,913 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,913 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,913 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,914 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:42,915 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,915 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,916 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,916 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,916 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,916 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,916 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,917 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,917 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:42,918 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:42,918 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:42,919 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:42,919 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:42,919 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:42,919 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:42,920 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:42,920 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:42,923 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 23:15:42,924 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 23:15:42,925 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 23:15:42,925 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 23:15:42,925 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 23:15:42,926 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 23:15:42,926 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = -2*ackermann_#in~n + 1 Supporting invariants [] [2018-11-28 23:15:42,926 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 23:15:42,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:43,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:43,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:15:43,112 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-28 23:15:43,112 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10 Second operand 4 states. [2018-11-28 23:15:43,411 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10. Second operand 4 states. Result 61 states and 85 transitions. Complement of second has 13 states. [2018-11-28 23:15:43,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 23:15:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2018-11-28 23:15:43,414 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 4 letters. [2018-11-28 23:15:43,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:43,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 12 letters. Loop has 4 letters. [2018-11-28 23:15:43,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:43,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 8 letters. [2018-11-28 23:15:43,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:43,417 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 85 transitions. [2018-11-28 23:15:43,421 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-28 23:15:43,424 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 53 states and 77 transitions. [2018-11-28 23:15:43,424 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2018-11-28 23:15:43,425 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-11-28 23:15:43,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 77 transitions. [2018-11-28 23:15:43,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:43,425 INFO L705 BuchiCegarLoop]: Abstraction has 53 states and 77 transitions. [2018-11-28 23:15:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 77 transitions. [2018-11-28 23:15:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2018-11-28 23:15:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-28 23:15:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2018-11-28 23:15:43,434 INFO L728 BuchiCegarLoop]: Abstraction has 47 states and 67 transitions. [2018-11-28 23:15:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 23:15:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 23:15:43,439 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 4 states. [2018-11-28 23:15:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:15:43,523 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-11-28 23:15:43,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 23:15:43,526 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 68 transitions. [2018-11-28 23:15:43,530 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-28 23:15:43,532 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 48 states and 66 transitions. [2018-11-28 23:15:43,533 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2018-11-28 23:15:43,533 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2018-11-28 23:15:43,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 66 transitions. [2018-11-28 23:15:43,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:43,534 INFO L705 BuchiCegarLoop]: Abstraction has 48 states and 66 transitions. [2018-11-28 23:15:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 66 transitions. [2018-11-28 23:15:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2018-11-28 23:15:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 23:15:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2018-11-28 23:15:43,541 INFO L728 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2018-11-28 23:15:43,541 INFO L608 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2018-11-28 23:15:43,541 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 23:15:43,541 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 58 transitions. [2018-11-28 23:15:43,542 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-28 23:15:43,543 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:43,543 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:43,543 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:43,543 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:15:43,544 INFO L794 eck$LassoCheckResult]: Stem: 422#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 398#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 399#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 406#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 425#ackermannENTRY ~m := #in~m;~n := #in~n; 429#L15 assume !(0 == ~m); 428#L18 assume 0 == ~n; 412#L19 call #t~ret0 := ackermann(~m - 1, 1);< 413#ackermannENTRY [2018-11-28 23:15:43,544 INFO L796 eck$LassoCheckResult]: Loop: 413#ackermannENTRY ~m := #in~m;~n := #in~n; 415#L15 assume !(0 == ~m); 418#L18 assume !(0 == ~n); 402#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 404#ackermannENTRY ~m := #in~m;~n := #in~n; 434#L15 assume !(0 == ~m); 435#L18 assume 0 == ~n; 414#L19 call #t~ret0 := ackermann(~m - 1, 1);< 413#ackermannENTRY [2018-11-28 23:15:43,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 3 times [2018-11-28 23:15:43,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:43,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:43,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:43,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:43,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:43,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:43,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 1 times [2018-11-28 23:15:43,556 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:43,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:43,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:43,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:43,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:43,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:43,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1880893067, now seen corresponding path program 1 times [2018-11-28 23:15:43,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:43,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:43,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:43,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:43,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:43,834 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:43,834 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:43,834 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:43,835 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:43,835 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:43,835 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:43,835 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:43,835 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:43,835 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration3_Loop [2018-11-28 23:15:43,836 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:43,836 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:43,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:43,967 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:43,967 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:43,974 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:43,974 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:43,977 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:43,977 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:43,999 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:43,999 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,005 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,005 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,026 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,026 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,029 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,029 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,051 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,051 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,054 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,054 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,075 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,076 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,079 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,079 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,101 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,101 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,113 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,113 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,134 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,134 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,150 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,151 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,175 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,175 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:44,230 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:44,230 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,249 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,249 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] [2018-11-28 23:15:44,426 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:44,426 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:44,427 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:44,427 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:44,427 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:44,427 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,427 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:44,427 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:44,428 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration3_Lasso [2018-11-28 23:15:44,428 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:44,428 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:44,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:44,602 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:44,602 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,608 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,608 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,613 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,613 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,636 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,636 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,638 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,639 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,659 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,659 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,662 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,663 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,683 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,684 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,686 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,686 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,708 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,708 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,711 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,711 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,737 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,737 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,740 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,740 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,763 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,763 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,766 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,766 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,787 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,788 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,791 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,791 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,830 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,830 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,834 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,834 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,854 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,854 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,858 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,858 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,881 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,881 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,883 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,883 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,905 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,905 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,908 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,909 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,931 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,931 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,933 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,933 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,956 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,957 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:44,959 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:44,959 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:44,981 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:44,981 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:45,004 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:45,004 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:45,031 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 23:15:45,033 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:45,033 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:45,033 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:45,033 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:45,033 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 23:15:45,033 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:45,033 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:45,033 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:45,034 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration3_Lasso [2018-11-28 23:15:45,034 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:45,034 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:45,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:45,210 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:45,211 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 23:15:45,211 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,212 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,212 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,212 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,212 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,212 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,213 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,213 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,214 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,214 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,215 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,215 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,215 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,215 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,215 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,216 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,216 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,216 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,217 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,217 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,217 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,218 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,218 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,219 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-28 23:15:45,219 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-28 23:15:45,227 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,227 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,228 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,228 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,228 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,228 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,228 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,229 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,229 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,230 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,230 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,230 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,231 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,231 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,231 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,231 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,231 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,231 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,232 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,232 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,233 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,233 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,233 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,233 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,233 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,233 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,234 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,234 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,235 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,235 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,235 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,235 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,235 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,236 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,236 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,236 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,237 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,237 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,237 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,237 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,238 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,238 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,238 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,238 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,238 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,239 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,239 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,240 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,240 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,240 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,240 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,240 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,240 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,241 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,241 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,242 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,242 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,242 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,242 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,242 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,242 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,243 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,243 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,243 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,244 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,244 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,244 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,244 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,244 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,245 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,245 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,245 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,246 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,246 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,246 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,247 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:45,247 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,247 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:45,247 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,247 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:45,247 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:45,248 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:45,248 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:45,249 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:45,249 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:45,249 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 23:15:45,249 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:45,254 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 23:15:45,254 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 23:15:45,282 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 23:15:45,312 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-11-28 23:15:45,312 INFO L444 ModelExtractionUtils]: 3 out of 11 variables were initially zero. Simplification set additionally 5 variables to zero. [2018-11-28 23:15:45,312 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 23:15:45,315 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 23:15:45,315 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 23:15:45,315 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~m) = 1*ackermann_#in~m Supporting invariants [1*ackermann_#in~m >= 0] [2018-11-28 23:15:45,362 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 23:15:45,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:45,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:46,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 23:15:46,134 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.5 stem predicates 4 loop predicates [2018-11-28 23:15:46,134 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19 Second operand 9 states. [2018-11-28 23:15:46,671 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19. Second operand 9 states. Result 139 states and 195 transitions. Complement of second has 32 states. [2018-11-28 23:15:46,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 5 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:46,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-28 23:15:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2018-11-28 23:15:46,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 8 letters. [2018-11-28 23:15:46,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:46,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 16 letters. Loop has 8 letters. [2018-11-28 23:15:46,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:46,675 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 16 letters. [2018-11-28 23:15:46,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:46,676 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 139 states and 195 transitions. [2018-11-28 23:15:46,682 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2018-11-28 23:15:46,686 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 139 states to 85 states and 119 transitions. [2018-11-28 23:15:46,686 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2018-11-28 23:15:46,687 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2018-11-28 23:15:46,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 119 transitions. [2018-11-28 23:15:46,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:46,687 INFO L705 BuchiCegarLoop]: Abstraction has 85 states and 119 transitions. [2018-11-28 23:15:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 119 transitions. [2018-11-28 23:15:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2018-11-28 23:15:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 23:15:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2018-11-28 23:15:46,697 INFO L728 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2018-11-28 23:15:46,697 INFO L608 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2018-11-28 23:15:46,697 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 23:15:46,697 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 69 states and 98 transitions. [2018-11-28 23:15:46,699 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2018-11-28 23:15:46,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:46,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:46,699 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:46,699 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:46,700 INFO L794 eck$LassoCheckResult]: Stem: 732#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 701#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 702#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 712#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 733#ackermannENTRY ~m := #in~m;~n := #in~n; 748#L15 assume !(0 == ~m); 747#L18 assume 0 == ~n; 706#L19 call #t~ret0 := ackermann(~m - 1, 1);< 714#ackermannENTRY ~m := #in~m;~n := #in~n; 745#L15 assume !(0 == ~m); 730#L18 [2018-11-28 23:15:46,700 INFO L796 eck$LassoCheckResult]: Loop: 730#L18 assume !(0 == ~n); 703#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 704#ackermannENTRY ~m := #in~m;~n := #in~n; 722#L15 assume !(0 == ~m); 730#L18 [2018-11-28 23:15:46,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:46,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1290385452, now seen corresponding path program 4 times [2018-11-28 23:15:46,700 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:46,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:46,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:46,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:46,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:46,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:46,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1978510, now seen corresponding path program 2 times [2018-11-28 23:15:46,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:46,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:46,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:46,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:46,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:46,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash 743855841, now seen corresponding path program 2 times [2018-11-28 23:15:46,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:46,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:46,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:46,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:46,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:46,829 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:46,829 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:46,830 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:46,830 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:46,830 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:46,830 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:46,830 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:46,831 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:46,831 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration4_Loop [2018-11-28 23:15:46,831 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:46,831 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:46,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:46,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:46,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:46,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:46,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:46,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:47,068 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:47,069 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:47,074 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:47,074 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:47,077 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:47,078 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:47,099 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:47,099 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:47,102 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:47,102 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:47,123 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:47,123 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:47,152 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:47,152 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:47,626 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:47,626 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:47,663 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:47,664 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:47,678 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:47,679 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:47,712 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:47,713 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:47,725 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:47,725 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:47,757 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:47,757 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:47,772 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:47,772 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8, ackermann_~m=-8} Honda state: {ackermann_#in~m=-8, ackermann_~m=-8} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 23:15:48,034 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:48,035 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:48,035 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:48,035 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:48,035 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:48,035 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,036 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:48,036 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:48,036 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration4_Lasso [2018-11-28 23:15:48,036 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:48,036 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:48,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,242 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:48,242 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,251 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,251 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,258 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,258 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,279 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,279 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,282 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,282 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,304 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,304 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,307 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,307 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:48,329 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,329 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,333 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,333 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,355 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,356 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,368 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,368 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,389 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,389 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,395 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,395 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,416 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,416 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,419 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,419 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,440 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,440 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,443 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,443 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,468 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,468 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,475 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,475 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,497 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,497 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,501 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:48,501 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,522 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:48,522 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,549 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:48,549 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:48,708 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 23:15:48,710 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:48,710 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:48,710 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:48,710 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:48,710 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 23:15:48,710 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:48,710 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:48,710 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:48,711 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration4_Lasso [2018-11-28 23:15:48,711 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:48,711 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:48,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:48,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:49,044 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:49,045 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 23:15:49,045 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,047 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,047 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,047 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,047 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,047 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,048 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,048 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,049 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,049 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,049 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,050 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,050 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,050 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,050 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,050 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,050 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,051 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,051 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,061 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,061 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,061 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,061 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,061 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,062 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,062 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,066 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,066 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,067 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,067 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,067 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,067 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,067 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,068 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,068 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,068 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,072 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,073 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,073 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,073 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,073 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,073 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,073 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,073 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,074 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,074 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,078 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,078 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,078 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,078 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,079 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,079 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,079 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,080 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,080 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,080 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,084 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,084 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 23:15:49,084 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,094 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 23:15:49,095 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 23:15:49,124 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,125 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,125 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,125 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,125 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,125 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,126 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,126 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,126 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,127 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,127 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,128 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,128 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:49,128 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,128 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:49,128 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,128 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:49,129 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:49,129 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:49,129 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:49,130 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:49,130 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:49,130 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 23:15:49,130 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:49,136 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 23:15:49,139 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 23:15:49,206 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 23:15:49,243 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2018-11-28 23:15:49,243 INFO L444 ModelExtractionUtils]: 11 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-11-28 23:15:49,244 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 23:15:49,249 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 23:15:49,249 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 23:15:49,249 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~n) = 1*ackermann_~n Supporting invariants [1*ackermann_~n >= 0] [2018-11-28 23:15:49,280 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 23:15:49,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:49,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:49,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:15:49,503 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2018-11-28 23:15:49,503 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-11-28 23:15:49,538 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 70 states and 99 transitions. Complement of second has 6 states. [2018-11-28 23:15:49,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 23:15:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-11-28 23:15:49,539 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-28 23:15:49,541 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:49,541 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 23:15:49,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:49,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:49,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:15:49,653 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.3 stem predicates 4 loop predicates [2018-11-28 23:15:49,653 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-11-28 23:15:49,687 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 70 states and 99 transitions. Complement of second has 6 states. [2018-11-28 23:15:49,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 23:15:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-11-28 23:15:49,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-28 23:15:49,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:49,691 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 23:15:49,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:49,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:49,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:15:49,824 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2018-11-28 23:15:49,824 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2018-11-28 23:15:49,965 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 141 states and 191 transitions. Complement of second has 38 states. [2018-11-28 23:15:49,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 3 stem states 3 non-accepting loop states 2 accepting loop states [2018-11-28 23:15:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 23:15:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-11-28 23:15:49,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-28 23:15:49,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:49,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 14 letters. Loop has 4 letters. [2018-11-28 23:15:49,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:49,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 8 letters. [2018-11-28 23:15:49,968 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:49,968 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 141 states and 191 transitions. [2018-11-28 23:15:49,975 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2018-11-28 23:15:49,982 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 141 states to 98 states and 142 transitions. [2018-11-28 23:15:49,982 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-11-28 23:15:49,982 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2018-11-28 23:15:49,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 142 transitions. [2018-11-28 23:15:49,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:49,983 INFO L705 BuchiCegarLoop]: Abstraction has 98 states and 142 transitions. [2018-11-28 23:15:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 142 transitions. [2018-11-28 23:15:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2018-11-28 23:15:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-28 23:15:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2018-11-28 23:15:50,000 INFO L728 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-11-28 23:15:50,000 INFO L608 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2018-11-28 23:15:50,000 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-28 23:15:50,000 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 138 transitions. [2018-11-28 23:15:50,004 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2018-11-28 23:15:50,004 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:50,004 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:50,005 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:50,005 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:50,006 INFO L794 eck$LassoCheckResult]: Stem: 1312#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1278#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1279#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1287#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1316#ackermannENTRY ~m := #in~m;~n := #in~n; 1343#L15 assume !(0 == ~m); 1372#L18 assume !(0 == ~n); 1285#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1286#ackermannENTRY ~m := #in~m;~n := #in~n; 1297#L15 assume 0 == ~m;#res := 1 + ~n; 1313#ackermannFINAL assume true; 1317#ackermannEXIT >#44#return; 1281#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1283#ackermannENTRY [2018-11-28 23:15:50,006 INFO L796 eck$LassoCheckResult]: Loop: 1283#ackermannENTRY ~m := #in~m;~n := #in~n; 1295#L15 assume !(0 == ~m); 1369#L18 assume !(0 == ~n); 1280#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1283#ackermannENTRY [2018-11-28 23:15:50,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash 804076149, now seen corresponding path program 1 times [2018-11-28 23:15:50,006 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:50,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 23:15:50,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 23:15:50,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 23:15:50,060 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 23:15:50,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 3 times [2018-11-28 23:15:50,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:50,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:50,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:50,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:50,124 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:50,124 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:50,125 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:50,125 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:50,125 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:50,125 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,125 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:50,125 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:50,125 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration5_Loop [2018-11-28 23:15:50,126 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:50,126 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:50,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:50,222 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:50,222 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,227 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,227 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,230 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,230 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,248 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,248 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,251 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,251 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,271 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,271 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,274 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,274 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,294 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,294 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,296 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,296 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,316 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,317 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,341 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:50,341 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,353 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,353 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,374 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,374 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,378 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,378 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:50,398 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,399 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,402 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,402 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:50,423 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:50,424 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:50,426 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:50,426 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 23:15:50,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 23:15:50,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 23:15:50,444 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. cyclomatic complexity: 46 Second operand 5 states. [2018-11-28 23:15:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:15:50,512 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2018-11-28 23:15:50,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 23:15:50,514 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 122 transitions. [2018-11-28 23:15:50,517 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2018-11-28 23:15:50,526 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 85 states and 116 transitions. [2018-11-28 23:15:50,526 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2018-11-28 23:15:50,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2018-11-28 23:15:50,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 116 transitions. [2018-11-28 23:15:50,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:50,527 INFO L705 BuchiCegarLoop]: Abstraction has 85 states and 116 transitions. [2018-11-28 23:15:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 116 transitions. [2018-11-28 23:15:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2018-11-28 23:15:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-28 23:15:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2018-11-28 23:15:50,545 INFO L728 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2018-11-28 23:15:50,545 INFO L608 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2018-11-28 23:15:50,545 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-28 23:15:50,545 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 82 states and 112 transitions. [2018-11-28 23:15:50,549 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2018-11-28 23:15:50,549 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:50,549 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:50,553 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:50,553 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:50,553 INFO L794 eck$LassoCheckResult]: Stem: 1508#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1477#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1478#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1489#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1511#ackermannENTRY ~m := #in~m;~n := #in~n; 1529#L15 assume !(0 == ~m); 1526#L18 assume 0 == ~n; 1491#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1492#ackermannENTRY ~m := #in~m;~n := #in~n; 1500#L15 assume !(0 == ~m); 1557#L18 assume !(0 == ~n); 1494#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1533#ackermannENTRY ~m := #in~m;~n := #in~n; 1555#L15 assume !(0 == ~m); 1517#L18 assume 0 == ~n; 1493#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1495#ackermannENTRY ~m := #in~m;~n := #in~n; 1527#L15 assume 0 == ~m;#res := 1 + ~n; 1524#ackermannFINAL assume true; 1519#ackermannEXIT >#42#return; 1521#L19-1 #res := #t~ret0;havoc #t~ret0; 1535#ackermannFINAL assume true; 1532#ackermannEXIT >#44#return; 1516#L21-1 [2018-11-28 23:15:50,555 INFO L796 eck$LassoCheckResult]: Loop: 1516#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1531#ackermannENTRY ~m := #in~m;~n := #in~n; 1536#L15 assume !(0 == ~m); 1515#L18 assume 0 == ~n; 1504#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1523#ackermannENTRY ~m := #in~m;~n := #in~n; 1546#L15 assume !(0 == ~m); 1502#L18 assume !(0 == ~n); 1505#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1553#ackermannENTRY ~m := #in~m;~n := #in~n; 1549#L15 assume !(0 == ~m); 1547#L18 assume 0 == ~n; 1504#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1523#ackermannENTRY ~m := #in~m;~n := #in~n; 1546#L15 assume 0 == ~m;#res := 1 + ~n; 1545#ackermannFINAL assume true; 1537#ackermannEXIT >#42#return; 1521#L19-1 #res := #t~ret0;havoc #t~ret0; 1535#ackermannFINAL assume true; 1532#ackermannEXIT >#44#return; 1516#L21-1 [2018-11-28 23:15:50,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1914958677, now seen corresponding path program 1 times [2018-11-28 23:15:50,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:50,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:50,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:50,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:50,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash -190850389, now seen corresponding path program 1 times [2018-11-28 23:15:50,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:50,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:50,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:50,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:50,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1249696767, now seen corresponding path program 1 times [2018-11-28 23:15:50,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:50,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:50,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 23:15:50,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:15:50,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:15:50,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:50,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-28 23:15:51,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:15:51,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-11-28 23:15:51,597 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:51,597 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:51,598 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:51,598 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:51,598 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:51,598 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:51,598 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:51,598 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:51,598 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration6_Loop [2018-11-28 23:15:51,599 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:51,599 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:51,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:51,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:51,611 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:51,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:51,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:51,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:51,685 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:51,685 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:51,690 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:51,690 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:51,693 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:51,693 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:51,714 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:51,714 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:51,737 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:51,737 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:52,580 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 23:15:52,582 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:52,583 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:52,583 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:52,583 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:52,583 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 23:15:52,583 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:52,583 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:52,583 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:52,583 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration6_Loop [2018-11-28 23:15:52,583 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:52,583 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:52,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:52,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:52,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:52,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:52,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:52,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:52,667 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:52,667 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 23:15:52,667 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:52,668 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:52,669 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:52,669 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:52,669 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:52,669 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:52,671 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:52,671 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:52,672 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:52,672 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:52,673 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:52,673 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:52,673 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:52,673 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:52,673 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:52,674 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:52,674 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:52,674 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:52,675 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:52,675 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:52,675 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:52,675 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:52,675 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:52,675 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:52,676 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:52,676 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:52,686 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:52,686 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:52,686 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:52,687 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:52,687 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:52,687 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:52,687 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:52,687 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:52,687 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:52,695 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 23:15:52,697 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 23:15:52,698 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 23:15:52,700 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 23:15:52,700 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 23:15:52,700 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 23:15:52,700 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~m) = 1*ackermann_~m Supporting invariants [] [2018-11-28 23:15:52,700 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 23:15:52,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:52,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:52,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 23:15:52,955 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 23:15:52,955 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2018-11-28 23:15:53,231 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33. Second operand 11 states. Result 180 states and 253 transitions. Complement of second has 31 states. [2018-11-28 23:15:53,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 23:15:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 31 transitions. [2018-11-28 23:15:53,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 31 transitions. Stem has 23 letters. Loop has 20 letters. [2018-11-28 23:15:53,238 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:53,238 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 23:15:53,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:53,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:53,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 23:15:53,472 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 23:15:53,473 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2018-11-28 23:15:54,312 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33. Second operand 11 states. Result 288 states and 426 transitions. Complement of second has 49 states. [2018-11-28 23:15:54,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2018-11-28 23:15:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 23:15:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 44 transitions. [2018-11-28 23:15:54,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 20 letters. [2018-11-28 23:15:54,319 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:54,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 43 letters. Loop has 20 letters. [2018-11-28 23:15:54,320 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:54,320 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 40 letters. [2018-11-28 23:15:54,321 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:15:54,325 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 426 transitions. [2018-11-28 23:15:54,333 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 47 [2018-11-28 23:15:54,342 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 227 states and 351 transitions. [2018-11-28 23:15:54,342 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 128 [2018-11-28 23:15:54,345 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 130 [2018-11-28 23:15:54,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 227 states and 351 transitions. [2018-11-28 23:15:54,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:54,346 INFO L705 BuchiCegarLoop]: Abstraction has 227 states and 351 transitions. [2018-11-28 23:15:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states and 351 transitions. [2018-11-28 23:15:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2018-11-28 23:15:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-28 23:15:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 327 transitions. [2018-11-28 23:15:54,369 INFO L728 BuchiCegarLoop]: Abstraction has 212 states and 327 transitions. [2018-11-28 23:15:54,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 23:15:54,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2018-11-28 23:15:54,370 INFO L87 Difference]: Start difference. First operand 212 states and 327 transitions. Second operand 21 states. [2018-11-28 23:15:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:15:56,379 INFO L93 Difference]: Finished difference Result 458 states and 602 transitions. [2018-11-28 23:15:56,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 23:15:56,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 458 states and 602 transitions. [2018-11-28 23:15:56,389 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 49 [2018-11-28 23:15:56,414 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 458 states to 410 states and 537 transitions. [2018-11-28 23:15:56,415 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 277 [2018-11-28 23:15:56,415 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 310 [2018-11-28 23:15:56,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 410 states and 537 transitions. [2018-11-28 23:15:56,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:56,416 INFO L705 BuchiCegarLoop]: Abstraction has 410 states and 537 transitions. [2018-11-28 23:15:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states and 537 transitions. [2018-11-28 23:15:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2018-11-28 23:15:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-11-28 23:15:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 462 transitions. [2018-11-28 23:15:56,455 INFO L728 BuchiCegarLoop]: Abstraction has 341 states and 462 transitions. [2018-11-28 23:15:56,458 INFO L608 BuchiCegarLoop]: Abstraction has 341 states and 462 transitions. [2018-11-28 23:15:56,458 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-28 23:15:56,458 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 341 states and 462 transitions. [2018-11-28 23:15:56,464 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 34 [2018-11-28 23:15:56,465 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:56,465 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:56,468 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:56,469 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:56,469 INFO L794 eck$LassoCheckResult]: Stem: 3363#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3310#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 3311#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 3362#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 3368#ackermannENTRY ~m := #in~m;~n := #in~n; 3407#L15 assume !(0 == ~m); 3406#L18 assume 0 == ~n; 3336#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3399#ackermannENTRY ~m := #in~m;~n := #in~n; 3404#L15 assume !(0 == ~m); 3413#L18 assume !(0 == ~n); 3384#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3410#ackermannENTRY ~m := #in~m;~n := #in~n; 3390#L15 assume !(0 == ~m); 3383#L18 assume 0 == ~n; 3385#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3349#ackermannENTRY ~m := #in~m;~n := #in~n; 3482#L15 assume 0 == ~m;#res := 1 + ~n; 3496#ackermannFINAL assume true; 3417#ackermannEXIT >#42#return; 3418#L19-1 #res := #t~ret0;havoc #t~ret0; 3623#ackermannFINAL assume true; 3621#ackermannEXIT >#44#return; 3326#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3338#ackermannENTRY ~m := #in~m;~n := #in~n; 3645#L15 assume !(0 == ~m); 3352#L18 assume !(0 == ~n); 3312#L21 [2018-11-28 23:15:56,469 INFO L796 eck$LassoCheckResult]: Loop: 3312#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3313#ackermannENTRY ~m := #in~m;~n := #in~n; 3350#L15 assume !(0 == ~m); 3364#L18 assume !(0 == ~n); 3312#L21 [2018-11-28 23:15:56,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 229970726, now seen corresponding path program 2 times [2018-11-28 23:15:56,470 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:56,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:56,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:56,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:56,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:15:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 23:15:56,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:15:56,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:15:56,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 23:15:56,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 23:15:56,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 23:15:56,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:15:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 23:15:56,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:15:56,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 23:15:56,687 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 23:15:56,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2228500, now seen corresponding path program 4 times [2018-11-28 23:15:56,687 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:56,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:56,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:56,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:56,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:56,750 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:56,750 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:56,750 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:56,750 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:56,750 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:56,751 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:56,751 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:56,751 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:56,751 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration7_Loop [2018-11-28 23:15:56,751 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:56,751 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:56,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:56,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:56,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:56,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:56,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:56,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:56,910 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:56,911 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:56,923 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:56,923 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:56,932 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:56,932 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:56,952 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:56,952 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:56,955 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:56,955 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:56,975 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:56,975 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:56,978 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:56,978 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:56,999 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:56,999 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,002 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,002 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,023 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,023 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,027 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,027 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,051 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,051 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,080 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:57,080 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,271 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,272 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=-4, ackermann_#in~n=-8} Honda state: {ackermann_~n=-4, ackermann_#in~n=-8} Generalized eigenvectors: [{ackermann_~n=-1, ackermann_#in~n=0}, {ackermann_~n=0, ackermann_#in~n=-1}, {ackermann_~n=0, ackermann_#in~n=4}] Lambdas: [1, 4, 0] Nus: [1, 1] [2018-11-28 23:15:57,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 23:15:57,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 23:15:57,290 INFO L87 Difference]: Start difference. First operand 341 states and 462 transitions. cyclomatic complexity: 134 Second operand 7 states. [2018-11-28 23:15:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:15:57,417 INFO L93 Difference]: Finished difference Result 255 states and 320 transitions. [2018-11-28 23:15:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 23:15:57,420 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 255 states and 320 transitions. [2018-11-28 23:15:57,423 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 17 [2018-11-28 23:15:57,427 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 255 states to 229 states and 287 transitions. [2018-11-28 23:15:57,427 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 182 [2018-11-28 23:15:57,427 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 182 [2018-11-28 23:15:57,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 287 transitions. [2018-11-28 23:15:57,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:15:57,428 INFO L705 BuchiCegarLoop]: Abstraction has 229 states and 287 transitions. [2018-11-28 23:15:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 287 transitions. [2018-11-28 23:15:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 212. [2018-11-28 23:15:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-28 23:15:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 268 transitions. [2018-11-28 23:15:57,437 INFO L728 BuchiCegarLoop]: Abstraction has 212 states and 268 transitions. [2018-11-28 23:15:57,437 INFO L608 BuchiCegarLoop]: Abstraction has 212 states and 268 transitions. [2018-11-28 23:15:57,438 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-28 23:15:57,438 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 212 states and 268 transitions. [2018-11-28 23:15:57,440 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 17 [2018-11-28 23:15:57,440 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:15:57,440 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:15:57,441 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 23:15:57,441 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-28 23:15:57,441 INFO L794 eck$LassoCheckResult]: Stem: 4033#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3999#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 4000#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 4032#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 4035#ackermannENTRY ~m := #in~m;~n := #in~n; 4061#L15 assume !(0 == ~m); 4055#L18 assume 0 == ~n; 4012#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4054#ackermannENTRY ~m := #in~m;~n := #in~n; 4052#L15 assume !(0 == ~m); 4053#L18 assume !(0 == ~n); 4021#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4045#ackermannENTRY ~m := #in~m;~n := #in~n; 4046#L15 assume !(0 == ~m); 4040#L18 assume 0 == ~n; 4041#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4019#ackermannENTRY ~m := #in~m;~n := #in~n; 4111#L15 assume !(0 == ~m); 4109#L18 assume !(0 == ~n); 4105#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4106#ackermannENTRY ~m := #in~m;~n := #in~n; 4123#L15 assume !(0 == ~m); 4121#L18 assume 0 == ~n; 4114#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4116#ackermannENTRY ~m := #in~m;~n := #in~n; 4122#L15 assume 0 == ~m;#res := 1 + ~n; 4118#ackermannFINAL assume true; 4112#ackermannEXIT >#42#return; 4110#L19-1 #res := #t~ret0;havoc #t~ret0; 4108#ackermannFINAL assume true; 4104#ackermannEXIT >#44#return; 4101#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4102#ackermannENTRY ~m := #in~m;~n := #in~n; 4107#L15 assume 0 == ~m;#res := 1 + ~n; 4103#ackermannFINAL assume true; 4100#ackermannEXIT >#46#return; 4099#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4098#ackermannFINAL assume true; 4087#ackermannEXIT >#42#return; 4076#L19-1 #res := #t~ret0;havoc #t~ret0; 4074#ackermannFINAL assume true; 4069#ackermannEXIT >#44#return; 4048#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4063#ackermannENTRY ~m := #in~m;~n := #in~n; 4050#L15 assume !(0 == ~m); 4047#L18 assume !(0 == ~n); 4004#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4005#ackermannENTRY [2018-11-28 23:15:57,442 INFO L796 eck$LassoCheckResult]: Loop: 4005#ackermannENTRY ~m := #in~m;~n := #in~n; 4166#L15 assume !(0 == ~m); 4165#L18 assume !(0 == ~n); 4001#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4005#ackermannENTRY [2018-11-28 23:15:57,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2042677982, now seen corresponding path program 1 times [2018-11-28 23:15:57,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:57,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:57,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:57,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:57,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:57,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:57,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 5 times [2018-11-28 23:15:57,459 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:57,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:57,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:57,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:15:57,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:57,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:15:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash -997227989, now seen corresponding path program 2 times [2018-11-28 23:15:57,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:15:57,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:15:57,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:57,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:15:57,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:15:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:15:57,591 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:57,591 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:57,592 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:57,592 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:57,592 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:57,592 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,592 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:57,592 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:57,593 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration8_Loop [2018-11-28 23:15:57,593 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:57,593 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:57,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:57,722 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:57,722 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:57,726 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,727 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,731 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,731 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,751 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,751 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,773 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:57,773 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,784 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,784 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,804 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,804 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,807 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,807 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,829 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,829 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,832 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,832 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,853 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,853 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,855 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,855 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-11-28 23:15:57,877 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,877 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,880 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,880 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,901 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,901 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,904 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,904 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:57,924 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:57,925 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:57,928 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:57,928 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-1} Honda state: {ackermann_#in~m=-1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 23:15:58,765 WARN L180 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-28 23:15:58,892 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-28 23:15:58,983 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:58,983 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:58,983 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:58,983 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:58,983 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:15:58,983 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:58,983 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:58,983 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:58,984 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration8_Lasso [2018-11-28 23:15:58,984 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:58,984 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:58,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,014 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,024 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,401 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:59,401 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,406 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,406 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,409 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,409 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,428 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,428 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,431 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,431 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,454 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,454 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,458 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,458 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,478 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,478 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,481 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,481 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,500 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,500 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,502 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,502 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,521 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,522 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,531 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,531 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,552 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,552 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,556 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,556 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,576 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,576 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,579 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,579 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:15:59,601 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,601 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,604 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,604 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,624 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,624 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,627 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,627 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,649 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,649 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,651 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,651 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,672 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,672 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,675 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,675 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,696 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,696 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,698 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:15:59,699 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,719 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:15:59,719 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,742 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:15:59,743 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:15:59,764 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 23:15:59,766 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:15:59,766 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:15:59,766 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:15:59,766 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:15:59,767 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 23:15:59,767 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:15:59,767 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:15:59,767 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:15:59,767 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration8_Lasso [2018-11-28 23:15:59,767 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:15:59,767 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:15:59,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:15:59,980 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:15:59,980 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 23:15:59,980 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:59,981 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:59,981 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:59,981 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:59,981 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:59,981 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:59,981 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:59,981 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:59,982 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:59,982 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:59,982 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:59,982 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:59,982 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:59,983 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:59,983 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:59,983 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:59,983 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:59,983 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:59,984 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:59,984 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:59,984 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:59,984 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:59,984 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:59,985 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:59,985 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:59,985 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:59,985 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:59,986 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:59,986 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:59,986 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:15:59,986 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:59,986 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:15:59,986 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:59,987 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:15:59,987 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:15:59,987 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:59,987 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:59,988 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:15:59,988 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:15:59,988 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 23:15:59,988 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:15:59,990 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 23:15:59,990 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 23:15:59,999 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:15:59,999 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:15:59,999 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,000 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,000 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,000 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,000 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,000 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,000 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,001 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,001 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,001 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,001 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,001 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,002 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,002 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,002 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,002 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,002 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,003 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,003 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,003 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,003 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,003 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,003 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,004 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,004 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,004 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,004 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,005 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,005 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,005 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,005 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,005 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,005 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,005 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,006 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,006 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,006 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,006 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,006 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,007 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,007 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,007 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,007 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,007 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,008 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,008 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,008 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,008 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,008 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,008 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,009 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,009 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,009 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,009 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,010 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,010 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,010 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,010 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,010 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,010 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,010 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,011 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,011 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,012 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,012 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,012 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,012 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,012 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,012 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,012 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,013 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,014 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 23:16:00,014 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,014 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 23:16:00,014 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,014 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 23:16:00,014 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,015 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 23:16:00,015 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 23:16:00,015 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 23:16:00,016 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 [2018-11-28 23:16:00,016 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 23:16:00,016 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 23:16:00,016 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-28 23:16:00,016 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 23:16:00,018 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-28 23:16:00,019 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-28 23:16:00,031 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 23:16:00,042 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2018-11-28 23:16:00,042 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 3 variables to zero. [2018-11-28 23:16:00,042 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 23:16:00,043 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-28 23:16:00,044 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 23:16:00,044 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2018-11-28 23:16:00,099 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-28 23:16:00,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:00,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:00,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:16:00,942 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.13 stem predicates 3 loop predicates [2018-11-28 23:16:00,942 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-11-28 23:16:01,060 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63. Second operand 16 states. Result 221 states and 282 transitions. Complement of second has 7 states. [2018-11-28 23:16:01,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 3 stem states 0 non-accepting loop states 1 accepting loop states [2018-11-28 23:16:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 23:16:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-28 23:16:01,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 23:16:01,074 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:16:01,074 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 23:16:01,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:01,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:01,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:16:01,698 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.13 stem predicates 3 loop predicates [2018-11-28 23:16:01,698 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-11-28 23:16:01,817 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63. Second operand 16 states. Result 221 states and 282 transitions. Complement of second has 7 states. [2018-11-28 23:16:01,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 3 stem states 0 non-accepting loop states 1 accepting loop states [2018-11-28 23:16:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 23:16:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-28 23:16:01,821 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 23:16:01,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:16:01,822 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 23:16:01,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:01,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:02,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 23:16:02,368 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.13 stem predicates 3 loop predicates [2018-11-28 23:16:02,368 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63 Second operand 16 states. [2018-11-28 23:16:04,185 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 212 states and 268 transitions. cyclomatic complexity: 63. Second operand 16 states. Result 506 states and 647 transitions. Complement of second has 68 states. [2018-11-28 23:16:04,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 25 states 20 stem states 2 non-accepting loop states 2 accepting loop states [2018-11-28 23:16:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 23:16:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 72 transitions. [2018-11-28 23:16:04,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-28 23:16:04,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:16:04,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-28 23:16:04,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:16:04,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 72 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-28 23:16:04,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 23:16:04,191 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 506 states and 647 transitions. [2018-11-28 23:16:04,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:04,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 506 states to 331 states and 405 transitions. [2018-11-28 23:16:04,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 266 [2018-11-28 23:16:04,211 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 270 [2018-11-28 23:16:04,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 331 states and 405 transitions. [2018-11-28 23:16:04,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:16:04,212 INFO L705 BuchiCegarLoop]: Abstraction has 331 states and 405 transitions. [2018-11-28 23:16:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states and 405 transitions. [2018-11-28 23:16:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 293. [2018-11-28 23:16:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-11-28 23:16:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 360 transitions. [2018-11-28 23:16:04,237 INFO L728 BuchiCegarLoop]: Abstraction has 293 states and 360 transitions. [2018-11-28 23:16:04,237 INFO L608 BuchiCegarLoop]: Abstraction has 293 states and 360 transitions. [2018-11-28 23:16:04,237 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-28 23:16:04,237 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 293 states and 360 transitions. [2018-11-28 23:16:04,244 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:04,244 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:16:04,244 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:16:04,248 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 23:16:04,248 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:16:04,248 INFO L794 eck$LassoCheckResult]: Stem: 5854#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 5821#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 5822#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 5853#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 5860#ackermannENTRY ~m := #in~m;~n := #in~n; 5880#L15 assume !(0 == ~m); 5879#L18 assume 0 == ~n; 5873#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5878#ackermannENTRY ~m := #in~m;~n := #in~n; 5876#L15 assume !(0 == ~m); 5877#L18 assume !(0 == ~n); 5837#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5875#ackermannENTRY ~m := #in~m;~n := #in~n; 5868#L15 assume !(0 == ~m); 5870#L18 assume 0 == ~n; 5836#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5838#ackermannENTRY ~m := #in~m;~n := #in~n; 5951#L15 assume !(0 == ~m); 5949#L18 assume !(0 == ~n); 5944#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5945#ackermannENTRY ~m := #in~m;~n := #in~n; 5962#L15 assume !(0 == ~m); 5958#L18 assume 0 == ~n; 5953#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5956#ackermannENTRY ~m := #in~m;~n := #in~n; 5965#L15 assume 0 == ~m;#res := 1 + ~n; 5959#ackermannFINAL assume true; 5952#ackermannEXIT >#42#return; 5950#L19-1 #res := #t~ret0;havoc #t~ret0; 5948#ackermannFINAL assume true; 5943#ackermannEXIT >#44#return; 5940#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5941#ackermannENTRY ~m := #in~m;~n := #in~n; 5946#L15 assume 0 == ~m;#res := 1 + ~n; 5942#ackermannFINAL assume true; 5939#ackermannEXIT >#46#return; 5938#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5935#ackermannFINAL assume true; 5934#ackermannEXIT >#42#return; 5914#L19-1 #res := #t~ret0;havoc #t~ret0; 5912#ackermannFINAL assume true; 5901#ackermannEXIT >#44#return; 5902#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5984#ackermannENTRY ~m := #in~m;~n := #in~n; 5991#L15 assume !(0 == ~m); 5992#L18 assume !(0 == ~n); 6012#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5825#ackermannENTRY ~m := #in~m;~n := #in~n; 6067#L15 assume !(0 == ~m); 6061#L18 assume 0 == ~n; 6056#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5835#ackermannENTRY [2018-11-28 23:16:04,248 INFO L796 eck$LassoCheckResult]: Loop: 5835#ackermannENTRY ~m := #in~m;~n := #in~n; 6062#L15 assume !(0 == ~m); 6063#L18 assume !(0 == ~n); 5834#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6071#ackermannENTRY ~m := #in~m;~n := #in~n; 6068#L15 assume !(0 == ~m); 6066#L18 assume 0 == ~n; 5833#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5835#ackermannENTRY [2018-11-28 23:16:04,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash -997228084, now seen corresponding path program 3 times [2018-11-28 23:16:04,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:04,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:04,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:04,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:04,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 23:16:04,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:16:04,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:16:04,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 23:16:04,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 23:16:04,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 23:16:04,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 23:16:04,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:16:04,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 23:16:04,609 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 23:16:04,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 2 times [2018-11-28 23:16:04,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:04,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:04,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:04,824 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:16:04,824 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:16:04,824 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:16:04,825 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:16:04,825 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:16:04,825 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:04,825 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:16:04,825 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:16:04,825 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration9_Loop [2018-11-28 23:16:04,826 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:16:04,826 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:16:04,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:04,897 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:16:04,897 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:04,902 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:04,902 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:04,905 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:04,906 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:04,927 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:04,927 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:04,930 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:04,930 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:04,951 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:04,952 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:04,954 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:04,954 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:04,976 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:04,976 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:04,980 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:04,981 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:05,003 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:05,003 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:05,006 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:05,007 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:05,028 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:05,029 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:05,032 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:05,032 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:05,053 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:05,053 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:05,077 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:16:05,077 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:05,090 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:05,090 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:16:05,113 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:05,114 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:05,118 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:05,118 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 23:16:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 23:16:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-11-28 23:16:05,137 INFO L87 Difference]: Start difference. First operand 293 states and 360 transitions. cyclomatic complexity: 74 Second operand 15 states. [2018-11-28 23:16:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:16:05,873 INFO L93 Difference]: Finished difference Result 301 states and 365 transitions. [2018-11-28 23:16:05,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 23:16:05,874 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 301 states and 365 transitions. [2018-11-28 23:16:05,881 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:05,886 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 301 states to 297 states and 361 transitions. [2018-11-28 23:16:05,886 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 236 [2018-11-28 23:16:05,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 236 [2018-11-28 23:16:05,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 297 states and 361 transitions. [2018-11-28 23:16:05,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:16:05,887 INFO L705 BuchiCegarLoop]: Abstraction has 297 states and 361 transitions. [2018-11-28 23:16:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states and 361 transitions. [2018-11-28 23:16:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 277. [2018-11-28 23:16:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-11-28 23:16:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 339 transitions. [2018-11-28 23:16:05,904 INFO L728 BuchiCegarLoop]: Abstraction has 277 states and 339 transitions. [2018-11-28 23:16:05,904 INFO L608 BuchiCegarLoop]: Abstraction has 277 states and 339 transitions. [2018-11-28 23:16:05,905 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-28 23:16:05,905 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 277 states and 339 transitions. [2018-11-28 23:16:05,911 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:05,911 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:16:05,911 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:16:05,914 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 8, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 23:16:05,914 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:16:05,915 INFO L794 eck$LassoCheckResult]: Stem: 6664#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 6625#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 6626#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 6663#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 6669#ackermannENTRY ~m := #in~m;~n := #in~n; 6683#L15 assume !(0 == ~m); 6682#L18 assume 0 == ~n; 6679#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6681#ackermannENTRY ~m := #in~m;~n := #in~n; 6677#L15 assume !(0 == ~m); 6680#L18 assume !(0 == ~n); 6672#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6675#ackermannENTRY ~m := #in~m;~n := #in~n; 6673#L15 assume !(0 == ~m); 6671#L18 assume 0 == ~n; 6652#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6646#ackermannENTRY ~m := #in~m;~n := #in~n; 6654#L15 assume !(0 == ~m); 6668#L18 assume !(0 == ~n); 6636#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6722#ackermannENTRY ~m := #in~m;~n := #in~n; 6723#L15 assume !(0 == ~m); 6717#L18 assume 0 == ~n; 6718#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6642#ackermannENTRY ~m := #in~m;~n := #in~n; 6817#L15 assume 0 == ~m;#res := 1 + ~n; 6816#ackermannFINAL assume true; 6814#ackermannEXIT >#42#return; 6813#L19-1 #res := #t~ret0;havoc #t~ret0; 6812#ackermannFINAL assume true; 6809#ackermannEXIT >#44#return; 6807#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 6808#ackermannENTRY ~m := #in~m;~n := #in~n; 6811#L15 assume 0 == ~m;#res := 1 + ~n; 6810#ackermannFINAL assume true; 6806#ackermannEXIT >#46#return; 6805#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 6804#ackermannFINAL assume true; 6747#ackermannEXIT >#42#return; 6742#L19-1 #res := #t~ret0;havoc #t~ret0; 6740#ackermannFINAL assume true; 6729#ackermannEXIT >#44#return; 6628#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 6698#ackermannENTRY ~m := #in~m;~n := #in~n; 6692#L15 assume !(0 == ~m); 6691#L18 assume !(0 == ~n); 6627#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6629#ackermannENTRY ~m := #in~m;~n := #in~n; 6710#L15 assume !(0 == ~m); 6706#L18 assume !(0 == ~n); 6660#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6704#ackermannENTRY ~m := #in~m;~n := #in~n; 6702#L15 assume !(0 == ~m); 6703#L18 assume 0 == ~n; 6631#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6716#ackermannENTRY [2018-11-28 23:16:05,915 INFO L796 eck$LassoCheckResult]: Loop: 6716#ackermannENTRY ~m := #in~m;~n := #in~n; 6711#L15 assume !(0 == ~m); 6655#L18 assume !(0 == ~n); 6630#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6634#ackermannENTRY ~m := #in~m;~n := #in~n; 6700#L15 assume !(0 == ~m); 6699#L18 assume 0 == ~n; 6632#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6716#ackermannENTRY [2018-11-28 23:16:05,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash 258460313, now seen corresponding path program 4 times [2018-11-28 23:16:05,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:05,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:05,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:05,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:05,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 23:16:07,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:16:07,042 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:16:07,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 23:16:07,077 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 23:16:07,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 23:16:07,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 23:16:07,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:16:07,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-28 23:16:07,118 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 23:16:07,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:07,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 3 times [2018-11-28 23:16:07,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:07,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:07,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:07,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:07,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:07,322 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:16:07,323 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:16:07,323 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:16:07,323 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:16:07,323 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:16:07,323 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,323 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:16:07,323 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:16:07,324 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration10_Loop [2018-11-28 23:16:07,324 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:16:07,324 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:16:07,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:07,407 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:16:07,407 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,413 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,413 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,417 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,417 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,437 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,437 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,440 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,462 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,462 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,465 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,465 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,487 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,487 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,490 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,490 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,516 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,517 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,520 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,520 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,541 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,541 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,545 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,545 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,565 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,565 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,569 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,569 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,589 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:07,589 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:07,611 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:16:07,611 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:07,672 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:07,672 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=-1}, {ackermann_#in~m=0}] Lambdas: [0, 1, 8] Nus: [0, 0] [2018-11-28 23:16:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 23:16:07,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-11-28 23:16:07,691 INFO L87 Difference]: Start difference. First operand 277 states and 339 transitions. cyclomatic complexity: 69 Second operand 17 states. [2018-11-28 23:16:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:16:08,509 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2018-11-28 23:16:08,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 23:16:08,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 322 states and 390 transitions. [2018-11-28 23:16:08,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-28 23:16:08,520 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 322 states to 318 states and 386 transitions. [2018-11-28 23:16:08,520 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 248 [2018-11-28 23:16:08,521 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 248 [2018-11-28 23:16:08,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 318 states and 386 transitions. [2018-11-28 23:16:08,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:16:08,522 INFO L705 BuchiCegarLoop]: Abstraction has 318 states and 386 transitions. [2018-11-28 23:16:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states and 386 transitions. [2018-11-28 23:16:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 304. [2018-11-28 23:16:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-11-28 23:16:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2018-11-28 23:16:08,533 INFO L728 BuchiCegarLoop]: Abstraction has 304 states and 372 transitions. [2018-11-28 23:16:08,533 INFO L608 BuchiCegarLoop]: Abstraction has 304 states and 372 transitions. [2018-11-28 23:16:08,533 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-11-28 23:16:08,533 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 304 states and 372 transitions. [2018-11-28 23:16:08,535 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:08,536 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:16:08,536 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:16:08,537 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [11, 9, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 23:16:08,537 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:16:08,537 INFO L794 eck$LassoCheckResult]: Stem: 7494#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 7456#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 7457#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 7493#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 7500#ackermannENTRY ~m := #in~m;~n := #in~n; 7521#L15 assume !(0 == ~m); 7522#L18 assume 0 == ~n; 7514#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7517#ackermannENTRY ~m := #in~m;~n := #in~n; 7513#L15 assume !(0 == ~m); 7516#L18 assume !(0 == ~n); 7506#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7510#ackermannENTRY ~m := #in~m;~n := #in~n; 7511#L15 assume !(0 == ~m); 7505#L18 assume 0 == ~n; 7482#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7477#ackermannENTRY ~m := #in~m;~n := #in~n; 7484#L15 assume !(0 == ~m); 7499#L18 assume !(0 == ~n); 7616#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7662#ackermannENTRY ~m := #in~m;~n := #in~n; 7674#L15 assume !(0 == ~m); 7672#L18 assume 0 == ~n; 7667#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7670#ackermannENTRY ~m := #in~m;~n := #in~n; 7681#L15 assume 0 == ~m;#res := 1 + ~n; 7673#ackermannFINAL assume true; 7666#ackermannEXIT >#42#return; 7665#L19-1 #res := #t~ret0;havoc #t~ret0; 7664#ackermannFINAL assume true; 7661#ackermannEXIT >#44#return; 7658#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7659#ackermannENTRY ~m := #in~m;~n := #in~n; 7663#L15 assume 0 == ~m;#res := 1 + ~n; 7660#ackermannFINAL assume true; 7657#ackermannEXIT >#46#return; 7656#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 7648#ackermannFINAL assume true; 7585#ackermannEXIT >#42#return; 7584#L19-1 #res := #t~ret0;havoc #t~ret0; 7582#ackermannFINAL assume true; 7553#ackermannEXIT >#44#return; 7529#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7533#ackermannENTRY ~m := #in~m;~n := #in~n; 7531#L15 assume !(0 == ~m); 7528#L18 assume !(0 == ~n); 7530#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7460#ackermannENTRY ~m := #in~m;~n := #in~n; 7548#L15 assume !(0 == ~m); 7549#L18 assume !(0 == ~n); 7541#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7543#ackermannENTRY ~m := #in~m;~n := #in~n; 7542#L15 assume !(0 == ~m); 7540#L18 assume !(0 == ~n); 7488#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7538#ackermannENTRY ~m := #in~m;~n := #in~n; 7535#L15 assume !(0 == ~m); 7536#L18 assume 0 == ~n; 7463#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7473#ackermannENTRY [2018-11-28 23:16:08,538 INFO L796 eck$LassoCheckResult]: Loop: 7473#ackermannENTRY ~m := #in~m;~n := #in~n; 7695#L15 assume !(0 == ~m); 7491#L18 assume !(0 == ~n); 7461#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7462#ackermannENTRY ~m := #in~m;~n := #in~n; 7537#L15 assume !(0 == ~m); 7534#L18 assume 0 == ~n; 7465#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7473#ackermannENTRY [2018-11-28 23:16:08,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 807724262, now seen corresponding path program 5 times [2018-11-28 23:16:08,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:08,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:08,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:08,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:08,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:08,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:08,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 4 times [2018-11-28 23:16:08,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:08,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:08,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:08,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:08,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:08,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:08,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1221239647, now seen corresponding path program 6 times [2018-11-28 23:16:08,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:08,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:08,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:08,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:08,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 131 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-11-28 23:16:08,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:16:08,903 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:16:08,914 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 23:16:08,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-28 23:16:08,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 23:16:08,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 128 proven. 70 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-28 23:16:09,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:16:09,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 18 [2018-11-28 23:16:09,403 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:16:09,403 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:16:09,404 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:16:09,404 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:16:09,404 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:16:09,404 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,404 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:16:09,404 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:16:09,404 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration11_Loop [2018-11-28 23:16:09,405 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:16:09,405 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:16:09,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:09,488 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:16:09,488 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,494 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,494 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,500 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,500 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,523 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,523 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,526 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,526 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,547 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,547 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,550 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,550 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,570 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,570 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,573 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,573 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,593 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,594 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,596 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,596 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:16:09,617 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,617 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 139 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,621 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,621 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,647 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,648 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,650 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,650 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:16:09,670 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:09,670 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 141 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:09,693 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:16:09,693 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:09,706 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:09,706 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] [2018-11-28 23:16:09,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 23:16:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-11-28 23:16:09,726 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. cyclomatic complexity: 75 Second operand 18 states. [2018-11-28 23:16:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:16:10,240 INFO L93 Difference]: Finished difference Result 341 states and 411 transitions. [2018-11-28 23:16:10,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 23:16:10,243 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 411 transitions. [2018-11-28 23:16:10,247 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:10,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 241 states and 286 transitions. [2018-11-28 23:16:10,250 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 172 [2018-11-28 23:16:10,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 172 [2018-11-28 23:16:10,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 241 states and 286 transitions. [2018-11-28 23:16:10,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:16:10,251 INFO L705 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-11-28 23:16:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states and 286 transitions. [2018-11-28 23:16:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-11-28 23:16:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-28 23:16:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2018-11-28 23:16:10,266 INFO L728 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-11-28 23:16:10,266 INFO L608 BuchiCegarLoop]: Abstraction has 241 states and 286 transitions. [2018-11-28 23:16:10,266 INFO L442 BuchiCegarLoop]: ======== Iteration 12============ [2018-11-28 23:16:10,266 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 241 states and 286 transitions. [2018-11-28 23:16:10,271 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:10,272 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:16:10,272 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:16:10,276 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [22, 16, 15, 10, 10, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-11-28 23:16:10,276 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:16:10,277 INFO L794 eck$LassoCheckResult]: Stem: 8381#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 8345#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 8346#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 8380#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 8388#ackermannENTRY ~m := #in~m;~n := #in~n; 8408#L15 assume !(0 == ~m); 8407#L18 assume !(0 == ~n); 8375#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8405#ackermannENTRY ~m := #in~m;~n := #in~n; 8404#L15 assume !(0 == ~m); 8403#L18 assume 0 == ~n; 8400#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8402#ackermannENTRY ~m := #in~m;~n := #in~n; 8401#L15 assume !(0 == ~m); 8399#L18 assume !(0 == ~n); 8396#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8395#ackermannENTRY ~m := #in~m;~n := #in~n; 8397#L15 assume !(0 == ~m); 8563#L18 assume 0 == ~n; 8417#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8363#ackermannENTRY ~m := #in~m;~n := #in~n; 8452#L15 assume !(0 == ~m); 8449#L18 assume !(0 == ~n); 8357#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8445#ackermannENTRY ~m := #in~m;~n := #in~n; 8488#L15 assume !(0 == ~m); 8479#L18 assume 0 == ~n; 8476#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8426#ackermannENTRY ~m := #in~m;~n := #in~n; 8500#L15 assume 0 == ~m;#res := 1 + ~n; 8499#ackermannFINAL assume true; 8475#ackermannEXIT >#42#return; 8473#L19-1 #res := #t~ret0;havoc #t~ret0; 8472#ackermannFINAL assume true; 8444#ackermannEXIT >#44#return; 8439#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8440#ackermannENTRY ~m := #in~m;~n := #in~n; 8454#L15 assume 0 == ~m;#res := 1 + ~n; 8453#ackermannFINAL assume true; 8438#ackermannEXIT >#46#return; 8434#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8430#ackermannFINAL assume true; 8416#ackermannEXIT >#42#return; 8418#L19-1 #res := #t~ret0;havoc #t~ret0; 8549#ackermannFINAL assume true; 8494#ackermannEXIT >#44#return; 8447#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8448#ackermannENTRY ~m := #in~m;~n := #in~n; 8579#L15 assume !(0 == ~m); 8498#L18 assume !(0 == ~n); 8368#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8366#ackermannENTRY ~m := #in~m;~n := #in~n; 8370#L15 assume !(0 == ~m); 8580#L18 assume !(0 == ~n); 8510#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8511#ackermannENTRY ~m := #in~m;~n := #in~n; 8574#L15 assume !(0 == ~m); 8573#L18 assume !(0 == ~n); 8384#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8524#ackermannENTRY ~m := #in~m;~n := #in~n; 8382#L15 assume !(0 == ~m); 8385#L18 assume 0 == ~n; 8412#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8492#ackermannENTRY ~m := #in~m;~n := #in~n; 8495#L15 assume 0 == ~m;#res := 1 + ~n; 8491#ackermannFINAL assume true; 8413#ackermannEXIT >#42#return; 8415#L19-1 #res := #t~ret0;havoc #t~ret0; 8526#ackermannFINAL assume true; 8523#ackermannEXIT >#44#return; 8483#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8521#ackermannENTRY ~m := #in~m;~n := #in~n; 8542#L15 assume 0 == ~m;#res := 1 + ~n; 8532#ackermannFINAL assume true; 8480#ackermannEXIT >#46#return; 8484#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8517#ackermannFINAL assume true; 8509#ackermannEXIT >#44#return; 8507#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8487#ackermannENTRY ~m := #in~m;~n := #in~n; 8548#L15 assume 0 == ~m;#res := 1 + ~n; 8547#ackermannFINAL assume true; 8505#ackermannEXIT >#46#return; 8504#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8496#ackermannFINAL assume true; 8466#ackermannEXIT >#44#return; 8460#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8464#ackermannENTRY ~m := #in~m;~n := #in~n; 8493#L15 assume 0 == ~m;#res := 1 + ~n; 8490#ackermannFINAL assume true; 8458#ackermannEXIT >#46#return; 8456#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8455#ackermannFINAL assume true; 8446#ackermannEXIT >#46#return; 8436#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8432#ackermannFINAL assume true; 8422#ackermannEXIT >#42#return; 8374#L19-1 #res := #t~ret0;havoc #t~ret0; 8377#ackermannFINAL assume true; 8582#ackermannEXIT >#44#return; 8349#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8411#ackermannENTRY ~m := #in~m;~n := #in~n; 8410#L15 assume !(0 == ~m); 8409#L18 assume !(0 == ~n); 8347#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8350#ackermannENTRY ~m := #in~m;~n := #in~n; 8577#L15 assume !(0 == ~m); 8576#L18 assume !(0 == ~n); 8372#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8371#ackermannENTRY ~m := #in~m;~n := #in~n; 8373#L15 assume !(0 == ~m); 8581#L18 assume !(0 == ~n); 8427#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8450#ackermannENTRY ~m := #in~m;~n := #in~n; 8437#L15 assume !(0 == ~m); 8433#L18 assume 0 == ~n; 8421#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8429#ackermannENTRY ~m := #in~m;~n := #in~n; 8513#L15 assume !(0 == ~m); 8514#L18 assume !(0 == ~n); 8468#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8471#ackermannENTRY ~m := #in~m;~n := #in~n; 8502#L15 assume !(0 == ~m); 8501#L18 assume 0 == ~n; 8352#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8359#ackermannENTRY [2018-11-28 23:16:10,277 INFO L796 eck$LassoCheckResult]: Loop: 8359#ackermannENTRY ~m := #in~m;~n := #in~n; 8512#L15 assume !(0 == ~m); 8378#L18 assume !(0 == ~n); 8351#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8355#ackermannENTRY ~m := #in~m;~n := #in~n; 8386#L15 assume !(0 == ~m); 8387#L18 assume 0 == ~n; 8353#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8359#ackermannENTRY [2018-11-28 23:16:10,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash 286526941, now seen corresponding path program 7 times [2018-11-28 23:16:10,278 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:10,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:10,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 495 proven. 85 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 23:16:10,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:16:10,719 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:16:10,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:16:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:10,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 495 proven. 85 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 23:16:10,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:16:10,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 23:16:10,848 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 23:16:10,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 5 times [2018-11-28 23:16:10,848 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:10,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:10,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:10,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:16:10,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:11,080 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:16:11,080 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:16:11,080 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:16:11,080 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:16:11,080 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:16:11,081 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,081 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:16:11,081 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:16:11,081 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration12_Loop [2018-11-28 23:16:11,081 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:16:11,081 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:16:11,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:11,166 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:16:11,166 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,172 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,172 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,175 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,175 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,196 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,197 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,200 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,200 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,221 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,222 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,224 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,224 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,244 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,245 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,248 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,248 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,268 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,268 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,271 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,271 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:16:11,292 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,292 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 149 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,295 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,295 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,319 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,319 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,322 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,322 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,343 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:11,343 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:11,365 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:16:11,365 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:11,377 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:11,377 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [15, 0, 1] Nus: [0, 0] [2018-11-28 23:16:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 23:16:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2018-11-28 23:16:11,396 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. cyclomatic complexity: 52 Second operand 25 states. [2018-11-28 23:16:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:16:13,084 INFO L93 Difference]: Finished difference Result 396 states and 482 transitions. [2018-11-28 23:16:13,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-28 23:16:13,087 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 396 states and 482 transitions. [2018-11-28 23:16:13,091 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:13,096 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 396 states to 392 states and 478 transitions. [2018-11-28 23:16:13,096 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 308 [2018-11-28 23:16:13,097 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2018-11-28 23:16:13,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 392 states and 478 transitions. [2018-11-28 23:16:13,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:16:13,102 INFO L705 BuchiCegarLoop]: Abstraction has 392 states and 478 transitions. [2018-11-28 23:16:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states and 478 transitions. [2018-11-28 23:16:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 347. [2018-11-28 23:16:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-11-28 23:16:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 420 transitions. [2018-11-28 23:16:13,118 INFO L728 BuchiCegarLoop]: Abstraction has 347 states and 420 transitions. [2018-11-28 23:16:13,118 INFO L608 BuchiCegarLoop]: Abstraction has 347 states and 420 transitions. [2018-11-28 23:16:13,118 INFO L442 BuchiCegarLoop]: ======== Iteration 13============ [2018-11-28 23:16:13,118 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 347 states and 420 transitions. [2018-11-28 23:16:13,125 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:13,125 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:16:13,125 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:16:13,127 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [23, 17, 15, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-11-28 23:16:13,127 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:16:13,127 INFO L794 eck$LassoCheckResult]: Stem: 9523#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 9486#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 9487#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 9522#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 9529#ackermannENTRY ~m := #in~m;~n := #in~n; 9551#L15 assume !(0 == ~m); 9552#L18 assume !(0 == ~n); 9545#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9548#ackermannENTRY ~m := #in~m;~n := #in~n; 9547#L15 assume !(0 == ~m); 9546#L18 assume 0 == ~n; 9541#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9543#ackermannENTRY ~m := #in~m;~n := #in~n; 9540#L15 assume !(0 == ~m); 9542#L18 assume !(0 == ~n); 9534#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9693#ackermannENTRY ~m := #in~m;~n := #in~n; 9533#L15 assume !(0 == ~m); 9536#L18 assume 0 == ~n; 9497#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9511#ackermannENTRY ~m := #in~m;~n := #in~n; 9585#L15 assume !(0 == ~m); 9586#L18 assume !(0 == ~n); 9575#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9579#ackermannENTRY ~m := #in~m;~n := #in~n; 9574#L15 assume !(0 == ~m); 9577#L18 assume 0 == ~n; 9764#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9766#ackermannENTRY ~m := #in~m;~n := #in~n; 9773#L15 assume 0 == ~m;#res := 1 + ~n; 9771#ackermannFINAL assume true; 9762#ackermannEXIT >#42#return; 9765#L19-1 #res := #t~ret0;havoc #t~ret0; 9768#ackermannFINAL assume true; 9723#ackermannEXIT >#44#return; 9719#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9720#ackermannENTRY ~m := #in~m;~n := #in~n; 9782#L15 assume 0 == ~m;#res := 1 + ~n; 9781#ackermannFINAL assume true; 9718#ackermannEXIT >#46#return; 9717#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9715#ackermannFINAL assume true; 9696#ackermannEXIT >#42#return; 9695#L19-1 #res := #t~ret0;havoc #t~ret0; 9694#ackermannFINAL assume true; 9692#ackermannEXIT >#44#return; 9615#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9690#ackermannENTRY ~m := #in~m;~n := #in~n; 9708#L15 assume !(0 == ~m); 9683#L18 assume !(0 == ~n); 9592#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9612#ackermannENTRY ~m := #in~m;~n := #in~n; 9613#L15 assume !(0 == ~m); 9590#L18 assume !(0 == ~n); 9593#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9803#ackermannENTRY ~m := #in~m;~n := #in~n; 9807#L15 assume !(0 == ~m); 9806#L18 assume !(0 == ~n); 9507#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9566#ackermannENTRY ~m := #in~m;~n := #in~n; 9568#L15 assume !(0 == ~m); 9573#L18 assume 0 == ~n; 9504#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9508#ackermannENTRY ~m := #in~m;~n := #in~n; 9809#L15 assume 0 == ~m;#res := 1 + ~n; 9565#ackermannFINAL assume true; 9808#ackermannEXIT >#42#return; 9776#L19-1 #res := #t~ret0;havoc #t~ret0; 9774#ackermannFINAL assume true; 9737#ackermannEXIT >#44#return; 9730#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9736#ackermannENTRY ~m := #in~m;~n := #in~n; 9743#L15 assume 0 == ~m;#res := 1 + ~n; 9742#ackermannFINAL assume true; 9728#ackermannEXIT >#46#return; 9733#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9804#ackermannFINAL assume true; 9802#ackermannEXIT >#44#return; 9792#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9798#ackermannENTRY ~m := #in~m;~n := #in~n; 9805#L15 assume 0 == ~m;#res := 1 + ~n; 9800#ackermannFINAL assume true; 9791#ackermannEXIT >#46#return; 9789#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9788#ackermannFINAL assume true; 9786#ackermannEXIT >#44#return; 9703#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9705#ackermannENTRY ~m := #in~m;~n := #in~n; 9801#L15 assume 0 == ~m;#res := 1 + ~n; 9790#ackermannFINAL assume true; 9702#ackermannEXIT >#46#return; 9641#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9714#ackermannFINAL assume true; 9716#ackermannEXIT >#46#return; 9623#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9622#ackermannFINAL assume true; 9620#ackermannEXIT >#42#return; 9618#L19-1 #res := #t~ret0;havoc #t~ret0; 9617#ackermannFINAL assume true; 9616#ackermannEXIT >#44#return; 9607#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9611#ackermannENTRY ~m := #in~m;~n := #in~n; 9610#L15 assume !(0 == ~m); 9609#L18 assume !(0 == ~n); 9603#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9606#ackermannENTRY ~m := #in~m;~n := #in~n; 9605#L15 assume !(0 == ~m); 9604#L18 assume !(0 == ~n); 9599#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9602#ackermannENTRY ~m := #in~m;~n := #in~n; 9601#L15 assume !(0 == ~m); 9600#L18 assume !(0 == ~n); 9597#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9596#ackermannENTRY ~m := #in~m;~n := #in~n; 9598#L15 assume !(0 == ~m); 9701#L18 assume !(0 == ~n); 9558#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9571#ackermannENTRY ~m := #in~m;~n := #in~n; 9562#L15 assume !(0 == ~m); 9563#L18 assume 0 == ~n; 9499#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9569#ackermannENTRY ~m := #in~m;~n := #in~n; 9570#L15 assume !(0 == ~m); 9727#L18 assume !(0 == ~n); 9518#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9724#ackermannENTRY ~m := #in~m;~n := #in~n; 9779#L15 assume !(0 == ~m); 9780#L18 assume 0 == ~n; 9492#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9572#ackermannENTRY [2018-11-28 23:16:13,127 INFO L796 eck$LassoCheckResult]: Loop: 9572#ackermannENTRY ~m := #in~m;~n := #in~n; 9564#L15 assume !(0 == ~m); 9520#L18 assume !(0 == ~n); 9491#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9495#ackermannENTRY ~m := #in~m;~n := #in~n; 9778#L15 assume !(0 == ~m); 9560#L18 assume 0 == ~n; 9493#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9572#ackermannENTRY [2018-11-28 23:16:13,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1393549654, now seen corresponding path program 8 times [2018-11-28 23:16:13,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:13,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:13,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 546 proven. 104 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 23:16:13,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:16:13,907 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:16:13,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 23:16:13,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 23:16:13,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 23:16:13,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 546 proven. 104 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-11-28 23:16:14,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:16:14,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 23:16:14,018 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 23:16:14,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 6 times [2018-11-28 23:16:14,019 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:14,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:14,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:14,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:14,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:14,225 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:16:14,226 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:16:14,226 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:16:14,226 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:16:14,226 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:16:14,226 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,226 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:16:14,226 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:16:14,226 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration13_Loop [2018-11-28 23:16:14,226 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:16:14,226 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:16:14,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:14,341 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:16:14,341 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,347 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,347 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,351 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,351 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,372 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,372 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,377 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,377 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,399 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,399 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,401 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,402 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,422 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,423 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,425 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,425 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,447 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,447 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,449 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,449 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,471 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,471 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,474 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,475 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,496 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,496 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:16:14,519 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:16:14,519 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 161 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,574 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,574 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:14,596 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:14,596 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:14,608 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:14,608 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-28 23:16:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 23:16:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2018-11-28 23:16:14,627 INFO L87 Difference]: Start difference. First operand 347 states and 420 transitions. cyclomatic complexity: 80 Second operand 27 states. [2018-11-28 23:16:16,480 WARN L180 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-11-28 23:16:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:16:17,317 INFO L93 Difference]: Finished difference Result 413 states and 501 transitions. [2018-11-28 23:16:17,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-28 23:16:17,320 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 413 states and 501 transitions. [2018-11-28 23:16:17,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-28 23:16:17,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 413 states to 409 states and 497 transitions. [2018-11-28 23:16:17,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 316 [2018-11-28 23:16:17,329 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 316 [2018-11-28 23:16:17,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 409 states and 497 transitions. [2018-11-28 23:16:17,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 23:16:17,329 INFO L705 BuchiCegarLoop]: Abstraction has 409 states and 497 transitions. [2018-11-28 23:16:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states and 497 transitions. [2018-11-28 23:16:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 386. [2018-11-28 23:16:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-11-28 23:16:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 473 transitions. [2018-11-28 23:16:17,340 INFO L728 BuchiCegarLoop]: Abstraction has 386 states and 473 transitions. [2018-11-28 23:16:17,341 INFO L608 BuchiCegarLoop]: Abstraction has 386 states and 473 transitions. [2018-11-28 23:16:17,341 INFO L442 BuchiCegarLoop]: ======== Iteration 14============ [2018-11-28 23:16:17,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 386 states and 473 transitions. [2018-11-28 23:16:17,343 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 23:16:17,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 23:16:17,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 23:16:17,345 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [24, 18, 15, 12, 12, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2018-11-28 23:16:17,345 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2018-11-28 23:16:17,345 INFO L794 eck$LassoCheckResult]: Stem: 10814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 10772#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 10773#L31 assume !(main_~n~0 < 0 || main_~n~0 > 23); 10813#L34 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 10817#ackermannENTRY ~m := #in~m;~n := #in~n; 10838#L15 assume !(0 == ~m); 10839#L18 assume !(0 == ~n); 10832#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10835#ackermannENTRY ~m := #in~m;~n := #in~n; 10834#L15 assume !(0 == ~m); 10833#L18 assume 0 == ~n; 10828#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10830#ackermannENTRY ~m := #in~m;~n := #in~n; 10827#L15 assume !(0 == ~m); 10829#L18 assume !(0 == ~n); 10811#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10824#ackermannENTRY ~m := #in~m;~n := #in~n; 10822#L15 assume !(0 == ~m); 10820#L18 assume 0 == ~n; 10821#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10792#ackermannENTRY ~m := #in~m;~n := #in~n; 11024#L15 assume !(0 == ~m); 11022#L18 assume !(0 == ~n); 10781#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11020#ackermannENTRY ~m := #in~m;~n := #in~n; 11053#L15 assume !(0 == ~m); 11049#L18 assume 0 == ~n; 11032#L19 call #t~ret0 := ackermann(~m - 1, 1);< 11035#ackermannENTRY ~m := #in~m;~n := #in~n; 11046#L15 assume 0 == ~m;#res := 1 + ~n; 11038#ackermannFINAL assume true; 11031#ackermannEXIT >#42#return; 11030#L19-1 #res := #t~ret0;havoc #t~ret0; 11028#ackermannFINAL assume true; 11019#ackermannEXIT >#44#return; 11013#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11014#ackermannENTRY ~m := #in~m;~n := #in~n; 11029#L15 assume 0 == ~m;#res := 1 + ~n; 11018#ackermannFINAL assume true; 11012#ackermannEXIT >#46#return; 11010#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11008#ackermannFINAL assume true; 11006#ackermannEXIT >#42#return; 10810#L19-1 #res := #t~ret0;havoc #t~ret0; 10812#ackermannFINAL assume true; 11098#ackermannEXIT >#44#return; 10775#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 10842#ackermannENTRY ~m := #in~m;~n := #in~n; 10841#L15 assume !(0 == ~m); 10840#L18 assume !(0 == ~n); 10774#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10776#ackermannENTRY ~m := #in~m;~n := #in~n; 11124#L15 assume !(0 == ~m); 10862#L18 assume !(0 == ~n); 10864#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11122#ackermannENTRY ~m := #in~m;~n := #in~n; 11129#L15 assume !(0 == ~m); 11128#L18 assume !(0 == ~n); 10786#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10849#ackermannENTRY ~m := #in~m;~n := #in~n; 10850#L15 assume !(0 == ~m); 10861#L18 assume 0 == ~n; 10784#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10788#ackermannENTRY ~m := #in~m;~n := #in~n; 11070#L15 assume 0 == ~m;#res := 1 + ~n; 10859#ackermannFINAL assume true; 11065#ackermannEXIT >#42#return; 11066#L19-1 #res := #t~ret0;havoc #t~ret0; 11090#ackermannFINAL assume true; 11087#ackermannEXIT >#44#return; 11082#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11086#ackermannENTRY ~m := #in~m;~n := #in~n; 11089#L15 assume 0 == ~m;#res := 1 + ~n; 11088#ackermannFINAL assume true; 11078#ackermannEXIT >#46#return; 11084#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11125#ackermannFINAL assume true; 11121#ackermannEXIT >#44#return; 11110#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11119#ackermannENTRY ~m := #in~m;~n := #in~n; 11127#L15 assume 0 == ~m;#res := 1 + ~n; 11126#ackermannFINAL assume true; 11108#ackermannEXIT >#46#return; 11107#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11106#ackermannFINAL assume true; 11104#ackermannEXIT >#44#return; 11100#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 11102#ackermannENTRY ~m := #in~m;~n := #in~n; 11131#L15 assume 0 == ~m;#res := 1 + ~n; 11130#ackermannFINAL assume true; 11099#ackermannEXIT >#46#return; 10916#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 11134#ackermannFINAL assume true; 11133#ackermannEXIT >#46#return; 10900#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10899#ackermannFINAL assume true; 10897#ackermannEXIT >#42#return; 10895#L19-1 #res := #t~ret0;havoc #t~ret0; 10894#ackermannFINAL assume true; 10893#ackermannEXIT >#44#return; 10888#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 10892#ackermannENTRY ~m := #in~m;~n := #in~n; 10891#L15 assume !(0 == ~m); 10890#L18 assume !(0 == ~n); 10884#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10887#ackermannENTRY ~m := #in~m;~n := #in~n; 10886#L15 assume !(0 == ~m); 10885#L18 assume !(0 == ~n); 10880#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10883#ackermannENTRY ~m := #in~m;~n := #in~n; 10882#L15 assume !(0 == ~m); 10881#L18 assume !(0 == ~n); 10876#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10879#ackermannENTRY ~m := #in~m;~n := #in~n; 10878#L15 assume !(0 == ~m); 10877#L18 assume !(0 == ~n); 10852#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10875#ackermannENTRY ~m := #in~m;~n := #in~n; 10873#L15 assume !(0 == ~m); 10874#L18 assume !(0 == ~n); 10846#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10853#ackermannENTRY ~m := #in~m;~n := #in~n; 10844#L15 assume !(0 == ~m); 10847#L18 assume 0 == ~n; 10983#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10987#ackermannENTRY ~m := #in~m;~n := #in~n; 11047#L15 assume !(0 == ~m); 11045#L18 assume !(0 == ~n); 10782#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 11027#ackermannENTRY ~m := #in~m;~n := #in~n; 11072#L15 assume !(0 == ~m); 11069#L18 assume 0 == ~n; 10807#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10860#ackermannENTRY [2018-11-28 23:16:17,346 INFO L796 eck$LassoCheckResult]: Loop: 10860#ackermannENTRY ~m := #in~m;~n := #in~n; 10858#L15 assume !(0 == ~m); 10804#L18 assume !(0 == ~n); 10808#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 10854#ackermannENTRY ~m := #in~m;~n := #in~n; 10848#L15 assume !(0 == ~m); 10843#L18 assume 0 == ~n; 10805#L19 call #t~ret0 := ackermann(~m - 1, 1);< 10860#ackermannENTRY [2018-11-28 23:16:17,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -410189577, now seen corresponding path program 9 times [2018-11-28 23:16:17,346 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:17,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:17,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:17,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:17,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:17,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 7 times [2018-11-28 23:16:17,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:17,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:17,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:17,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 23:16:17,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:16:17,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:16:17,395 INFO L82 PathProgramCache]: Analyzing trace with hash -615721038, now seen corresponding path program 10 times [2018-11-28 23:16:17,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:16:17,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:16:17,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:17,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:16:17,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:16:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:16:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 527 proven. 279 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2018-11-28 23:16:17,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 23:16:17,806 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 23:16:17,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 23:16:17,872 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 23:16:17,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 23:16:17,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 23:16:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 464 proven. 365 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2018-11-28 23:16:17,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 23:16:17,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 23:16:18,065 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 23:16:18,065 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 23:16:18,065 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 23:16:18,065 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 23:16:18,065 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 23:16:18,066 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,066 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 23:16:18,066 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 23:16:18,066 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ackermann01_true-termination_true-no-overflow.c_Iteration14_Loop [2018-11-28 23:16:18,066 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 23:16:18,066 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 23:16:18,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 23:16:18,150 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 23:16:18,150 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,158 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,158 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,161 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,161 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,182 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,182 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,185 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,185 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,210 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,210 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,213 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,213 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,233 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,233 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,237 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,237 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,258 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,258 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,261 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,261 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 23:16:18,281 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,282 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 169 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,286 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,286 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,308 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,308 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,311 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,312 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,333 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 23:16:18,333 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 23:16:18,358 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 23:16:18,358 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 23:16:18,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 23:16:18,405 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-5} Honda state: {ackermann_#in~m=-5} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [9, 0, 1] Nus: [0, 0] [2018-11-28 23:16:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 23:16:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-28 23:16:18,424 INFO L87 Difference]: Start difference. First operand 386 states and 473 transitions. cyclomatic complexity: 94 Second operand 11 states. [2018-11-28 23:16:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:16:18,769 INFO L93 Difference]: Finished difference Result 379 states and 464 transitions. [2018-11-28 23:16:18,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 23:16:18,772 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 464 transitions. [2018-11-28 23:16:18,776 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 23:16:18,777 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 0 states and 0 transitions. [2018-11-28 23:16:18,777 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 23:16:18,777 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 23:16:18,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 23:16:18,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 23:16:18,777 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 23:16:18,777 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 23:16:18,777 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 23:16:18,777 INFO L442 BuchiCegarLoop]: ======== Iteration 15============ [2018-11-28 23:16:18,778 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-28 23:16:18,778 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 23:16:18,778 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-28 23:16:18,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 11:16:18 BoogieIcfgContainer [2018-11-28 23:16:18,786 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-28 23:16:18,786 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 23:16:18,786 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 23:16:18,787 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 23:16:18,787 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:15:38" (3/4) ... [2018-11-28 23:16:18,791 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 23:16:18,791 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 23:16:18,792 INFO L168 Benchmark]: Toolchain (without parser) took 41409.76 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 490.7 MB). Free memory was 946.0 MB in the beginning and 1.0 GB in the end (delta: -103.4 MB). Peak memory consumption was 387.4 MB. Max. memory is 11.5 GB. [2018-11-28 23:16:18,792 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:16:18,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.59 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 23:16:18,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.98 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:16:18,793 INFO L168 Benchmark]: Boogie Preprocessor took 28.87 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:16:18,794 INFO L168 Benchmark]: RCFGBuilder took 487.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-11-28 23:16:18,801 INFO L168 Benchmark]: BuchiAutomizer took 40584.03 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 349.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 69.9 MB). Peak memory consumption was 419.1 MB. Max. memory is 11.5 GB. [2018-11-28 23:16:18,802 INFO L168 Benchmark]: Witness Printer took 4.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:16:18,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 255.59 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.2 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 43.98 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.87 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 487.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 40584.03 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 349.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 69.9 MB). Peak memory consumption was 419.1 MB. Max. memory is 11.5 GB. * Witness Printer took 4.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 40.5s and 15 iterations. TraceHistogramMax:24. Analysis of lassos took 22.1s. Construction of modules took 5.3s. Büchi inclusion checks took 12.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 278 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.1s 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, 5.3s 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: 245ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 127 LassoNonterminationAnalysisSatUnbounded: 12 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...