./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 21:16:43,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 21:16:43,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 21:16:43,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 21:16:43,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 21:16:43,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 21:16:43,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 21:16:43,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 21:16:43,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 21:16:43,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 21:16:43,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 21:16:43,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 21:16:43,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 21:16:43,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 21:16:43,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 21:16:43,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 21:16:43,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 21:16:43,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 21:16:43,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 21:16:43,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 21:16:43,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 21:16:43,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 21:16:43,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 21:16:43,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 21:16:43,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 21:16:43,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 21:16:43,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 21:16:43,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 21:16:43,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 21:16:43,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 21:16:43,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 21:16:43,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 21:16:43,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 21:16:43,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 21:16:43,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 21:16:43,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 21:16:43,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 21:16:43,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 21:16:43,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 21:16:43,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 21:16:43,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 21:16:43,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 21:16:43,327 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 21:16:43,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 21:16:43,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 21:16:43,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 21:16:43,330 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 21:16:43,330 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 21:16:43,331 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 21:16:43,331 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 21:16:43,331 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 21:16:43,331 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 21:16:43,332 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 21:16:43,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 21:16:43,332 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 21:16:43,333 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 21:16:43,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 21:16:43,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 21:16:43,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 21:16:43,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 21:16:43,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 21:16:43,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 21:16:43,335 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 21:16:43,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 21:16:43,335 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 21:16:43,336 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 21:16:43,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 21:16:43,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 21:16:43,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 21:16:43,337 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 21:16:43,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 21:16:43,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 21:16:43,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 21:16:43,338 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 21:16:43,339 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 21:16:43,339 INFO L138 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2019-11-28 21:16:43,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 21:16:43,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 21:16:43,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 21:16:43,679 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 21:16:43,680 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 21:16:43,680 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-11-28 21:16:43,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9fe4e79/d30b73f1fa864f18844391e9ce6514a8/FLAG1e50de45d [2019-11-28 21:16:44,201 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 21:16:44,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-11-28 21:16:44,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9fe4e79/d30b73f1fa864f18844391e9ce6514a8/FLAG1e50de45d [2019-11-28 21:16:44,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9fe4e79/d30b73f1fa864f18844391e9ce6514a8 [2019-11-28 21:16:44,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 21:16:44,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 21:16:44,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:44,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 21:16:44,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 21:16:44,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26258dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44, skipping insertion in model container [2019-11-28 21:16:44,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 21:16:44,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 21:16:44,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:44,845 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 21:16:44,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:44,876 INFO L208 MainTranslator]: Completed translation [2019-11-28 21:16:44,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44 WrapperNode [2019-11-28 21:16:44,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:44,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:44,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 21:16:44,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 21:16:44,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:44,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 21:16:44,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 21:16:44,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 21:16:44,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 21:16:44,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 21:16:44,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 21:16:44,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 21:16:44,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 21:16:45,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 21:16:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 21:16:45,054 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 21:16:45,211 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 21:16:45,212 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 21:16:45,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:45 BoogieIcfgContainer [2019-11-28 21:16:45,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 21:16:45,214 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 21:16:45,214 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 21:16:45,218 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 21:16:45,219 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:45,219 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 09:16:44" (1/3) ... [2019-11-28 21:16:45,220 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2c23a6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:45, skipping insertion in model container [2019-11-28 21:16:45,221 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:45,221 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (2/3) ... [2019-11-28 21:16:45,221 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2c23a6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:45, skipping insertion in model container [2019-11-28 21:16:45,222 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:45,222 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:45" (3/3) ... [2019-11-28 21:16:45,224 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2019-11-28 21:16:45,287 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 21:16:45,288 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 21:16:45,288 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 21:16:45,288 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 21:16:45,288 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 21:16:45,289 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 21:16:45,289 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 21:16:45,289 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 21:16:45,314 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:45,353 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,354 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:45,354 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:45,365 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:45,366 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:45,366 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 21:16:45,366 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:45,369 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,369 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:45,370 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:45,370 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:45,370 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:45,380 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 21:16:45,381 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-28 21:16:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 21:16:45,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318096799] [2019-11-28 21:16:45,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,510 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 21:16:45,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984428987] [2019-11-28 21:16:45,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,529 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 21:16:45,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762556073] [2019-11-28 21:16:45,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,547 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,637 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:45,638 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:45,638 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:45,639 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:45,639 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:45,639 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,639 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:45,639 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:45,639 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2019-11-28 21:16:45,640 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:45,640 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:45,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,805 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:45,806 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:45,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,824 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,835 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe 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 [2019-11-28 21:16:45,842 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,842 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,846 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,846 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=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) [2019-11-28 21:16:45,874 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,875 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,880 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,881 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,896 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,900 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,900 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,909 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,909 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,934 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:45,936 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,951 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:45,954 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:45,955 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:45,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:45,955 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:45,955 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:45,955 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,955 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:45,956 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:45,956 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2019-11-28 21:16:45,956 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:45,956 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:45,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,067 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:46,074 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:46,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,093 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,093 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,094 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,094 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,095 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,099 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,100 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,104 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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) [2019-11-28 21:16:46,130 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,132 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,133 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,133 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,133 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,133 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,135 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,139 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,152 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,154 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,154 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,156 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,159 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,159 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:46,162 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,182 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,184 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,184 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,184 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,184 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,184 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,186 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,187 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:46,190 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,201 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,203 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,203 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,204 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,204 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,204 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,205 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,205 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:46,209 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:46,214 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:46,215 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,227 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:46,227 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:46,227 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:46,228 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:46,235 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,375 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 [2019-11-28 21:16:46,378 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 21:16:46,537 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-28 21:16:46,539 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 [2019-11-28 21:16:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 21:16:46,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 21:16:46,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 21:16:46,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 21:16:46,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 21:16:46,555 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:46,564 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 21:16:46,565 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 21:16:46,566 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 21:16:46,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 21:16:46,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,569 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 21:16:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 21:16:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 21:16:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 21:16:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 21:16:46,606 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:46,606 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:46,606 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 21:16:46,606 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 21:16:46,608 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:46,608 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:46,608 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:46,610 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:46,610 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:46,610 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:46,611 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,611 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 21:16:46,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471656048] [2019-11-28 21:16:46,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471656048] [2019-11-28 21:16:46,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550959196] [2019-11-28 21:16:46,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:46,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:46,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368831036] [2019-11-28 21:16:46,820 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 21:16:46,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903928067] [2019-11-28 21:16:46,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 21:16:46,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903928067] [2019-11-28 21:16:46,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 21:16:46,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 21:16:46,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473955612] [2019-11-28 21:16:46,932 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:46,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 21:16:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 21:16:46,940 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 21:16:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:47,056 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 21:16:47,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 21:16:47,058 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 21:16:47,061 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:47,065 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 21:16:47,066 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 21:16:47,066 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 21:16:47,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 21:16:47,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:47,068 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 21:16:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 21:16:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 21:16:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 21:16:47,077 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:47,077 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:47,078 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 21:16:47,078 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 21:16:47,081 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:47,082 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:47,083 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:47,084 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:47,084 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:47,085 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:47,085 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,086 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 21:16:47,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759982427] [2019-11-28 21:16:47,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:47,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759982427] [2019-11-28 21:16:47,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901589755] [2019-11-28 21:16:47,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 21:16:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:47,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:47,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:47,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:47,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634685706] [2019-11-28 21:16:47,227 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 21:16:47,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725314592] [2019-11-28 21:16:47,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,243 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:47,362 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:47,362 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:47,362 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:47,362 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:47,362 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:47,362 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,363 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:47,363 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:47,363 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2019-11-28 21:16:47,363 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:47,363 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:47,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,440 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:47,441 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 21:16:47,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:47,448 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:47,458 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:47,873 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:47,876 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:47,876 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:47,876 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:47,876 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:47,876 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:47,876 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,876 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:47,876 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:47,877 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2019-11-28 21:16:47,877 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:47,877 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:47,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,956 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:47,956 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2019-11-28 21:16:47,968 INFO L120 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 Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,973 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:47,973 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:47,973 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:47,974 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:47,974 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:47,975 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:47,975 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:47,978 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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) [2019-11-28 21:16:47,997 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:47,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:47,999 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:47,999 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:48,000 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:48,000 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:48,003 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:48,003 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,007 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:48,012 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:48,012 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,018 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:48,019 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:48,019 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:48,019 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:48,029 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:48,212 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-28 21:16:48,212 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 21:16:48,494 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-28 21:16:48,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 21:16:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 21:16:48,498 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 21:16:48,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:48,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 21:16:48,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:48,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 21:16:48,503 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:48,503 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 21:16:48,518 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:48,528 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 21:16:48,529 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 21:16:48,529 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:48,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 21:16:48,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:48,530 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 21:16:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 21:16:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 21:16:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 21:16:48,547 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 21:16:48,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:48,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 21:16:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 21:16:48,547 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 21:16:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:48,648 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 21:16:48,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 21:16:48,651 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 21:16:48,655 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:48,659 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 21:16:48,659 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 21:16:48,659 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:48,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 21:16:48,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:48,660 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 21:16:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 21:16:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 21:16:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 21:16:48,686 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:48,686 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:48,686 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 21:16:48,686 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 21:16:48,690 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:48,692 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:48,693 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:48,695 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:48,696 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 21:16:48,697 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 21:16:48,697 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 21:16:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 21:16:48,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:48,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379660840] [2019-11-28 21:16:48,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:48,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379660840] [2019-11-28 21:16:48,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97926579] [2019-11-28 21:16:48,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 21:16:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:48,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:48,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:48,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 21:16:48,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758456766] [2019-11-28 21:16:48,901 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 21:16:48,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:48,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46135681] [2019-11-28 21:16:48,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 21:16:49,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46135681] [2019-11-28 21:16:49,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972470966] [2019-11-28 21:16:49,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 21:16:49,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:49,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 21:16:49,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826590069] [2019-11-28 21:16:49,183 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:49,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 21:16:49,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 21:16:49,187 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 21:16:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:49,442 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 21:16:49,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 21:16:49,443 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 21:16:49,446 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:49,450 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 21:16:49,450 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 21:16:49,451 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 21:16:49,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 21:16:49,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:49,452 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 21:16:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 21:16:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 21:16:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 21:16:49,465 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:49,465 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:49,465 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 21:16:49,465 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 21:16:49,467 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:49,468 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:49,468 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:49,469 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:49,470 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 21:16:49,470 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 21:16:49,470 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 21:16:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 21:16:49,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:49,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761689298] [2019-11-28 21:16:49,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:49,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761689298] [2019-11-28 21:16:49,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361769976] [2019-11-28 21:16:49,610 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:49,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:49,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:49,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:49,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:49,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 21:16:49,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121463436] [2019-11-28 21:16:49,672 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 21:16:49,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:49,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841940688] [2019-11-28 21:16:49,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:49,685 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:49,932 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:49,932 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:49,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:49,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:49,933 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:49,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:49,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:49,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2019-11-28 21:16:49,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:49,933 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:49,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,033 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:50,033 INFO L404 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 [2019-11-28 21:16:50,044 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:50,045 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:50,048 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:50,048 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=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) [2019-11-28 21:16:50,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:50,055 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,058 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:50,058 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} 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 [2019-11-28 21:16:50,067 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:50,068 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:50,075 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:50,075 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} 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) [2019-11-28 21:16:50,089 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:50,089 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:50,106 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:50,106 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,629 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:50,631 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:50,631 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:50,631 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:50,631 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:50,631 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:50,631 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,631 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:50,632 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:50,632 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2019-11-28 21:16:50,632 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:50,632 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:50,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,731 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:50,731 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2019-11-28 21:16:50,741 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:50,743 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:50,743 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:50,743 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:50,744 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:50,744 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,747 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:50,747 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:50,749 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:16:50,754 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:50,756 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:50,756 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:50,756 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:50,756 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:50,756 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:50,757 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:50,757 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:50,758 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:16:50,763 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:50,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:50,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:50,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:50,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:50,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:50,769 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:50,769 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:50,778 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:50,781 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:50,781 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. 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) [2019-11-28 21:16:50,786 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:50,786 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:50,786 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:50,787 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:50,789 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:50,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:50,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:50,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:50,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:50,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:50,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:51,004 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 21:16:51,005 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:51,235 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-11-28 21:16:51,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 21:16:51,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:51,238 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,238 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:51,405 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 21:16:51,406 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:51,617 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-11-28 21:16:51,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 21:16:51,620 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:51,620 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,620 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:51,821 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 21:16:51,822 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:52,095 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-11-28 21:16:52,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 21:16:52,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:52,098 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:52,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 21:16:52,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:52,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 21:16:52,101 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:52,102 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 21:16:52,122 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 21:16:52,141 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 21:16:52,141 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 21:16:52,143 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 21:16:52,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 21:16:52,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:52,145 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 21:16:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 21:16:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 21:16:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 21:16:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 21:16:52,224 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 21:16:52,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 21:16:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 21:16:52,225 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 21:16:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:52,514 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 21:16:52,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 21:16:52,514 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 21:16:52,525 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:52,535 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 21:16:52,535 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 21:16:52,536 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 21:16:52,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 21:16:52,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:52,536 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 21:16:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 21:16:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 21:16:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 21:16:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 21:16:52,558 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:52,558 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:52,559 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 21:16:52,559 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 21:16:52,563 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:52,563 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:52,564 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:52,565 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:52,565 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:52,565 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 21:16:52,565 INFO L796 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 21:16:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 21:16:52,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:52,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995051059] [2019-11-28 21:16:52,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:52,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995051059] [2019-11-28 21:16:52,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860458062] [2019-11-28 21:16:52,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:52,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 21:16:52,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:52,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 21:16:52,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621032106] [2019-11-28 21:16:52,808 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 21:16:52,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:52,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476548117] [2019-11-28 21:16:52,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:52,813 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:52,851 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:52,851 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:52,852 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:52,852 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:52,852 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:52,852 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,852 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:52,852 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:52,853 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2019-11-28 21:16:52,853 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:52,853 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:52,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,913 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:52,914 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 21:16:52,918 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:52,922 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:52,922 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=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 [2019-11-28 21:16:52,928 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:52,931 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:52,931 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} 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 [2019-11-28 21:16:52,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,937 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:52,939 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:52,939 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=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 [2019-11-28 21:16:52,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,946 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2019-11-28 21:16:52,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:52,954 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:52,997 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:52,999 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:52,999 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:52,999 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:52,999 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:52,999 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:52,999 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,999 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:52,999 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:52,999 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2019-11-28 21:16:52,999 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:53,000 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:53,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:53,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:53,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:53,008 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:53,015 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:53,057 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:53,057 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2019-11-28 21:16:53,064 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:53,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:53,066 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:53,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:53,066 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:53,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:53,069 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:53,069 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:53,081 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:16:53,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:53,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:53,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:53,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:53,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:53,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:53,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:53,093 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:53,095 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:16:53,101 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:53,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:53,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:53,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:53,103 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:53,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:53,103 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:53,103 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:53,104 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:16:53,110 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:53,111 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:53,111 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:53,112 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:53,112 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:53,112 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:53,113 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:53,113 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:53,122 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:53,130 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:53,130 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. 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 [2019-11-28 21:16:53,138 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:53,138 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:53,138 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:53,139 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:53,140 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:53,242 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 21:16:53,243 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:53,324 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 21:16:53,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:53,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:53,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,326 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:53,454 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 21:16:53,454 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:53,520 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 21:16:53,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:53,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:53,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,522 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,608 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:53,631 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 21:16:53,631 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:53,719 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-11-28 21:16:53,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 21:16:53,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:53,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 21:16:53,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 21:16:53,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 21:16:53,732 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:53,741 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 21:16:53,741 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 21:16:53,741 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 21:16:53,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 21:16:53,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:53,743 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 21:16:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 21:16:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 21:16:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 21:16:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 21:16:53,763 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 21:16:53,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 21:16:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 21:16:53,764 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 21:16:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:54,139 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 21:16:54,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 21:16:54,140 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 21:16:54,147 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:54,156 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 21:16:54,156 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 21:16:54,157 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 21:16:54,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 21:16:54,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:54,157 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 21:16:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 21:16:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 21:16:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 21:16:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 21:16:54,177 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:54,177 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:54,177 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 21:16:54,178 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 21:16:54,181 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:54,182 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:54,182 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:54,183 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:54,183 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:54,183 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 21:16:54,183 INFO L796 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 21:16:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 21:16:54,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:54,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989876566] [2019-11-28 21:16:54,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:54,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989876566] [2019-11-28 21:16:54,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735714759] [2019-11-28 21:16:54,458 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:54,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:54,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:54,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:54,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 21:16:54,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:54,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2019-11-28 21:16:54,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019513607] [2019-11-28 21:16:54,527 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 21:16:54,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:54,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562199575] [2019-11-28 21:16:54,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:54,536 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:54,578 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:54,578 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:54,578 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:54,579 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:54,579 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:54,579 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:54,579 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:54,579 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:54,580 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2019-11-28 21:16:54,580 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:54,580 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:54,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,650 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:54,650 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 21:16:54,656 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,656 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:54,665 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:54,665 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=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 [2019-11-28 21:16:54,670 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,670 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:54,673 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:54,673 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=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 [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:54,702 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,702 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:54,707 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:54,707 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2019-11-28 21:16:54,715 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,715 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2019-11-28 21:16:54,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:54,729 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:17:00,303 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:17:00,305 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:17:00,305 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:17:00,305 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:17:00,305 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:17:00,305 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:17:00,305 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,305 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:17:00,305 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:17:00,306 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2019-11-28 21:17:00,306 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:17:00,306 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:17:00,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,372 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:17:00,372 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2019-11-28 21:17:00,377 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:00,378 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,378 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,379 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,379 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,379 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,379 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,379 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,380 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,386 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:00,388 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,388 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,388 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,388 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,388 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,388 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,388 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,390 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:17:00,395 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:00,397 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,397 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,398 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,399 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:17:00,405 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:00,406 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,407 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,407 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,407 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,407 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,408 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,408 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,410 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:17:00,413 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:17:00,413 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. 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) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,417 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:17:00,417 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:17:00,417 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:17:00,417 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:17:00,422 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:17:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:00,550 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 21:17:00,550 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:17:00,613 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-11-28 21:17:00,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:17:00,615 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:17:00,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,616 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:17:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:00,731 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 21:17:00,731 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:17:00,827 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-11-28 21:17:00,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:17:00,829 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:17:00,829 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,829 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 21:17:00,829 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 21:17:00,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,830 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 21:17:00,841 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:17:00,852 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 21:17:00,852 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 21:17:00,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 21:17:00,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 21:17:00,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:17:00,853 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 21:17:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 21:17:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 21:17:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 21:17:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 21:17:00,876 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 21:17:00,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:17:00,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 21:17:00,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-11-28 21:17:00,877 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 23 states. [2019-11-28 21:17:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:17:01,608 INFO L93 Difference]: Finished difference Result 1715 states and 3613 transitions. [2019-11-28 21:17:01,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 21:17:01,608 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1715 states and 3613 transitions. [2019-11-28 21:17:01,637 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 156 [2019-11-28 21:17:01,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1715 states to 1469 states and 3094 transitions. [2019-11-28 21:17:01,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 506 [2019-11-28 21:17:01,685 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 533 [2019-11-28 21:17:01,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1469 states and 3094 transitions. [2019-11-28 21:17:01,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:17:01,686 INFO L688 BuchiCegarLoop]: Abstraction has 1469 states and 3094 transitions. [2019-11-28 21:17:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states and 3094 transitions. [2019-11-28 21:17:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1302. [2019-11-28 21:17:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 21:17:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 21:17:01,776 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:01,776 INFO L591 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:01,776 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 21:17:01,776 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1302 states and 2622 transitions. [2019-11-28 21:17:01,789 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 21:17:01,789 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:17:01,789 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:17:01,793 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:17:01,794 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:17:01,795 INFO L794 eck$LassoCheckResult]: Stem: 13389#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 13390#L25 call main_#t~ret2 := fibo(main_~x~0);< 13450#fiboENTRY ~n := #in~n; 13501#L6 assume !(~n < 1); 13500#L8 assume !(1 == ~n); 13496#L11 call #t~ret0 := fibo(~n - 1);< 13499#fiboENTRY ~n := #in~n; 13498#L6 assume !(~n < 1); 13497#L8 assume !(1 == ~n); 13492#L11 call #t~ret0 := fibo(~n - 1);< 13495#fiboENTRY ~n := #in~n; 13494#L6 assume !(~n < 1); 13493#L8 assume !(1 == ~n); 13430#L11 call #t~ret0 := fibo(~n - 1);< 13491#fiboENTRY ~n := #in~n; 13490#L6 assume !(~n < 1); 13489#L8 assume !(1 == ~n); 13484#L11 call #t~ret0 := fibo(~n - 1);< 13488#fiboENTRY ~n := #in~n; 13486#L6 assume !(~n < 1); 13487#L8 assume !(1 == ~n); 13480#L11 call #t~ret0 := fibo(~n - 1);< 13479#fiboENTRY ~n := #in~n; 13482#L6 assume !(~n < 1); 13485#L8 assume !(1 == ~n); 13481#L11 call #t~ret0 := fibo(~n - 1);< 13522#fiboENTRY ~n := #in~n; 13540#L6 assume !(~n < 1); 13537#L8 assume 1 == ~n;#res := 1; 13534#fiboFINAL assume true; 13530#fiboEXIT >#32#return; 13516#L11-1 call #t~ret1 := fibo(~n - 2);< 13517#fiboENTRY ~n := #in~n; 14622#L6 assume ~n < 1;#res := 0; 14620#fiboFINAL assume true; 14616#fiboEXIT >#34#return; 14570#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 14613#fiboFINAL assume true; 14504#fiboEXIT >#32#return; 13409#L11-1 call #t~ret1 := fibo(~n - 2);< 13408#fiboENTRY ~n := #in~n; 13413#L6 assume !(~n < 1); 13514#L8 assume !(1 == ~n); 13434#L11 call #t~ret0 := fibo(~n - 1);< 13435#fiboENTRY ~n := #in~n; 14119#L6 assume !(~n < 1); 14118#L8 assume !(1 == ~n); 13471#L11 call #t~ret0 := fibo(~n - 1);< 13606#fiboENTRY ~n := #in~n; 14102#L6 assume !(~n < 1); 14101#L8 assume !(1 == ~n); 13473#L11 [2019-11-28 21:17:01,795 INFO L796 eck$LassoCheckResult]: Loop: 13473#L11 call #t~ret0 := fibo(~n - 1);< 13606#fiboENTRY ~n := #in~n; 14102#L6 assume !(~n < 1); 14101#L8 assume !(1 == ~n); 13473#L11 [2019-11-28 21:17:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 21:17:01,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:17:01,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811257624] [2019-11-28 21:17:01,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:17:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 129 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 21:17:02,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811257624] [2019-11-28 21:17:02,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594784182] [2019-11-28 21:17:02,019 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:17:02,064 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 21:17:02,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:17:02,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:17:02,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-28 21:17:02,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:17:02,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 22 [2019-11-28 21:17:02,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372972452] [2019-11-28 21:17:02,126 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:17:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 21:17:02,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:17:02,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069060899] [2019-11-28 21:17:02,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:17:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:17:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:17:02,130 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:17:02,168 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:17:02,168 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:17:02,168 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:17:02,168 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:17:02,169 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:17:02,169 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:02,169 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:17:02,169 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:17:02,169 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2019-11-28 21:17:02,171 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:17:02,171 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:17:02,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,233 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:17:02,234 INFO L404 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 [2019-11-28 21:17:02,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:17:02,240 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2019-11-28 21:17:02,251 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:17:02,251 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:17:04,973 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:17:04,975 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:17:04,975 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:17:04,975 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:17:04,975 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:17:04,975 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:17:04,975 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:04,976 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:17:04,976 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:17:04,976 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2019-11-28 21:17:04,976 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:17:04,976 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:17:04,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:04,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:04,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:04,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:05,036 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:17:05,036 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2019-11-28 21:17:05,041 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:05,043 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,043 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,043 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,044 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:05,048 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:05,054 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:05,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,055 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,055 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,055 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,056 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,056 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:05,057 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:17:05,062 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:05,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,064 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,065 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,065 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:05,066 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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 [2019-11-28 21:17:05,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:17:05,073 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,073 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:05,078 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:17:05,081 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:17:05,081 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. 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 [2019-11-28 21:17:05,084 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:17:05,084 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:17:05,085 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:17:05,085 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:17:05,087 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:17:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:05,212 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 21:17:05,212 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 21:17:05,286 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1324 states and 2645 transitions. Complement of second has 18 states. [2019-11-28 21:17:05,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:17:05,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:17:05,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,287 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:17:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:05,437 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 21:17:05,437 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:17:05,630 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1505 states and 2854 transitions. Complement of second has 22 states. [2019-11-28 21:17:05,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:17:05,631 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:17:05,631 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,631 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:17:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:05,781 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 21:17:05,782 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 21:17:05,873 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1635 states and 3078 transitions. Complement of second has 27 states. [2019-11-28 21:17:05,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:17:05,874 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:17:05,875 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,875 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 21:17:05,875 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,875 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 21:17:05,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,876 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1635 states and 3078 transitions. [2019-11-28 21:17:05,901 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 21:17:05,933 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1635 states to 1302 states and 2622 transitions. [2019-11-28 21:17:05,933 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 411 [2019-11-28 21:17:05,934 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 447 [2019-11-28 21:17:05,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1302 states and 2622 transitions. [2019-11-28 21:17:05,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:17:05,935 INFO L688 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states and 2622 transitions. [2019-11-28 21:17:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2019-11-28 21:17:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 21:17:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 21:17:06,004 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:06,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:17:06,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 21:17:06,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-11-28 21:17:06,005 INFO L87 Difference]: Start difference. First operand 1302 states and 2622 transitions. Second operand 22 states. [2019-11-28 21:17:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:17:06,340 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2019-11-28 21:17:06,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 21:17:06,341 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 400 states and 513 transitions. [2019-11-28 21:17:06,346 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:17:06,346 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 400 states to 0 states and 0 transitions. [2019-11-28 21:17:06,347 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:17:06,347 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:17:06,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:17:06,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:17:06,347 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:17:06,347 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:17:06,347 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:17:06,347 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 21:17:06,347 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 21:17:06,348 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:17:06,348 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 21:17:06,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 09:17:06 BoogieIcfgContainer [2019-11-28 21:17:06,356 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 21:17:06,357 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 21:17:06,357 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 21:17:06,357 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 21:17:06,358 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:45" (3/4) ... [2019-11-28 21:17:06,363 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 21:17:06,364 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 21:17:06,366 INFO L168 Benchmark]: Toolchain (without parser) took 21779.50 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 385.9 MB). Free memory was 961.7 MB in the beginning and 1.2 GB in the end (delta: -259.2 MB). Peak memory consumption was 126.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,367 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:17:06,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.95 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,368 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.29 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:17:06,368 INFO L168 Benchmark]: Boogie Preprocessor took 74.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,370 INFO L168 Benchmark]: RCFGBuilder took 224.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,370 INFO L168 Benchmark]: BuchiAutomizer took 21142.47 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 248.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -106.4 MB). Peak memory consumption was 141.5 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,371 INFO L168 Benchmark]: Witness Printer took 6.69 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:17:06,374 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 289.95 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 36.29 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 74.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 224.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21142.47 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 248.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -106.4 MB). Peak memory consumption was 141.5 MB. Max. memory is 11.5 GB. * Witness Printer took 6.69 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 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 13 terminating modules (7 trivial, 3 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.0s and 9 iterations. TraceHistogramMax:11. Analysis of lassos took 14.0s. Construction of modules took 1.8s. Büchi inclusion checks took 4.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 12. Automata minimization 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 442 StatesRemovedByMinimization, 9 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 1302 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 242 SDtfs, 659 SDslu, 475 SDs, 0 SdLazy, 1881 SolverSat, 522 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp78 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...