./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-1.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_10-1.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 1ca069cb8d4103e8fb4700634948424bd87542bc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 21:16:18,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 21:16:18,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 21:16:18,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 21:16:18,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 21:16:18,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 21:16:18,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 21:16:18,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 21:16:18,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 21:16:18,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 21:16:18,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 21:16:18,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 21:16:18,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 21:16:18,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 21:16:18,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 21:16:18,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 21:16:18,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 21:16:18,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 21:16:18,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 21:16:18,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 21:16:18,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 21:16:18,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 21:16:18,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 21:16:18,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 21:16:18,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 21:16:18,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 21:16:18,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 21:16:18,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 21:16:18,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 21:16:18,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 21:16:18,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 21:16:18,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 21:16:18,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 21:16:18,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 21:16:18,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 21:16:18,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 21:16:18,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 21:16:18,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 21:16:18,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 21:16:18,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 21:16:18,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 21:16:18,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 21:16:18,280 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 21:16:18,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 21:16:18,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 21:16:18,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 21:16:18,282 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 21:16:18,282 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 21:16:18,283 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 21:16:18,283 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 21:16:18,283 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 21:16:18,283 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 21:16:18,283 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 21:16:18,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 21:16:18,284 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 21:16:18,284 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 21:16:18,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 21:16:18,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 21:16:18,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 21:16:18,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 21:16:18,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 21:16:18,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 21:16:18,286 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 21:16:18,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 21:16:18,286 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 21:16:18,286 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 21:16:18,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 21:16:18,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 21:16:18,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 21:16:18,287 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 21:16:18,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 21:16:18,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 21:16:18,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 21:16:18,288 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 21:16:18,289 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 21:16:18,289 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 -> 1ca069cb8d4103e8fb4700634948424bd87542bc [2019-11-28 21:16:18,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 21:16:18,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 21:16:18,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 21:16:18,601 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 21:16:18,601 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 21:16:18,602 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2019-11-28 21:16:18,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43ab86bd/7b78fb5a9ac2406b906f73f1c311164e/FLAG5f1fa3753 [2019-11-28 21:16:19,152 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 21:16:19,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2019-11-28 21:16:19,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43ab86bd/7b78fb5a9ac2406b906f73f1c311164e/FLAG5f1fa3753 [2019-11-28 21:16:19,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43ab86bd/7b78fb5a9ac2406b906f73f1c311164e [2019-11-28 21:16:19,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 21:16:19,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 21:16:19,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:19,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 21:16:19,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 21:16:19,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e30af7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19, skipping insertion in model container [2019-11-28 21:16:19,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 21:16:19,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 21:16:19,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:19,828 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 21:16:19,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:19,864 INFO L208 MainTranslator]: Completed translation [2019-11-28 21:16:19,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19 WrapperNode [2019-11-28 21:16:19,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:19,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:19,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 21:16:19,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 21:16:19,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:19,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 21:16:19,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 21:16:19,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 21:16:19,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (1/1) ... [2019-11-28 21:16:19,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 21:16:19,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 21:16:19,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 21:16:19,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 21:16:19,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (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 21:16:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 21:16:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 21:16:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 21:16:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 21:16:20,182 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 21:16:20,182 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 21:16:20,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:20 BoogieIcfgContainer [2019-11-28 21:16:20,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 21:16:20,184 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 21:16:20,184 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 21:16:20,188 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 21:16:20,189 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:20,189 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 09:16:19" (1/3) ... [2019-11-28 21:16:20,191 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3052eb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:20, skipping insertion in model container [2019-11-28 21:16:20,191 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:20,191 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:19" (2/3) ... [2019-11-28 21:16:20,192 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3052eb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:20, skipping insertion in model container [2019-11-28 21:16:20,192 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:20,192 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:20" (3/3) ... [2019-11-28 21:16:20,194 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2019-11-28 21:16:20,246 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 21:16:20,246 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 21:16:20,247 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 21:16:20,247 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 21:16:20,247 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 21:16:20,247 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 21:16:20,247 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 21:16:20,248 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 21:16:20,270 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:20,307 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:20,307 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:20,308 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:20,318 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:20,319 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:20,319 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 21:16:20,319 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:20,322 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:20,322 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:20,322 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:20,323 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:20,323 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:20,332 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 21:16:20,333 INFO L796 eck$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 21:16:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 21:16:20,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:20,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679702551] [2019-11-28 21:16:20,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:20,450 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 21:16:20,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:20,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237303880] [2019-11-28 21:16:20,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:20,466 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 21:16:20,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:20,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115034871] [2019-11-28 21:16:20,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:20,487 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:20,611 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:20,612 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:20,612 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:20,613 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:20,613 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:20,613 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:20,613 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:20,613 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:20,614 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2019-11-28 21:16:20,614 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:20,614 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:20,633 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 21:16:20,639 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 21:16:20,649 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 21:16:20,653 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 21:16:20,656 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 21:16:20,756 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:20,757 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 21:16:20,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:20,767 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 21:16:20,776 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:20,777 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 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 21:16:20,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:20,787 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:20,791 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:20,791 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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:20,803 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:20,804 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:20,807 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:20,808 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 21:16:20,814 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:20,814 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:20,822 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:20,823 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 21:16:20,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:20,836 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) [2019-11-28 21:16:20,849 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:20,849 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:20,861 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:20,864 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:20,864 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:20,865 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:20,865 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:20,865 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:20,865 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:20,865 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:20,865 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:20,865 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2019-11-28 21:16:20,865 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:20,866 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:20,869 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 21:16:20,880 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 21:16:20,885 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 21:16:20,891 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 21:16:20,894 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 21:16:20,972 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:20,980 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 21:16:20,987 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 21:16:20,990 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:20,990 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:20,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:20,991 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:20,991 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:20,995 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:20,995 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:21,000 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 21:16:21,021 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 21:16:21,023 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,023 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,024 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,024 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,024 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,026 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,026 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 21:16:21,029 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) [2019-11-28 21:16:21,048 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 21:16:21,051 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,051 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,053 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,053 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:21,056 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 10 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:21,073 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 21:16:21,075 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,075 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,075 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,076 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,076 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,078 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,082 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) [2019-11-28 21:16:21,098 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 21:16:21,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,101 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,101 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,105 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,106 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,113 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:21,118 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:21,119 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) [2019-11-28 21:16:21,136 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:21,136 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:21,136 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:21,137 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:21,143 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:16:21,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:21,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:21,283 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 21:16:21,300 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 21:16:21,302 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 21:16:21,432 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 21:16:21,433 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 21:16:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 21:16:21,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 21:16:21,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:21,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 21:16:21,442 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:21,442 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 21:16:21,442 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:21,443 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 21:16:21,449 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:21,458 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 21:16:21,459 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 21:16:21,460 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 21:16:21,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 21:16:21,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:21,463 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 21:16:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 21:16:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 21:16:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 21:16:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 21:16:21,499 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:21,499 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:21,500 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 21:16:21,500 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 21:16:21,501 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:21,501 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:21,502 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:21,503 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:21,503 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:21,504 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:21,504 INFO L796 eck$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 21:16:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 21:16:21,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:21,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953162419] [2019-11-28 21:16:21,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,625 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 21:16:21,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953162419] [2019-11-28 21:16:21,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918110603] [2019-11-28 21:16:21,627 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 21:16:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:21,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:21,681 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 21:16:21,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:21,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:21,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626458828] [2019-11-28 21:16:21,689 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,690 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 21:16:21,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:21,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022051439] [2019-11-28 21:16:21,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 21:16:21,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022051439] [2019-11-28 21:16:21,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 21:16:21,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 21:16:21,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551616169] [2019-11-28 21:16:21,761 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:21,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 21:16:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 21:16:21,765 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 21:16:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:21,853 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 21:16:21,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 21:16:21,854 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 21:16:21,856 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:21,857 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 21:16:21,858 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 21:16:21,858 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 21:16:21,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 21:16:21,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:21,859 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 21:16:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 21:16:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 21:16:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 21:16:21,863 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:21,863 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:21,864 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 21:16:21,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 21:16:21,865 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:21,865 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:21,865 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:21,866 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:21,866 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:21,866 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:21,867 INFO L796 eck$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 21:16:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 21:16:21,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:21,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961081893] [2019-11-28 21:16:21,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,941 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 21:16:21,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961081893] [2019-11-28 21:16:21,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574847442] [2019-11-28 21:16:21,942 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:21,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:22,001 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 21:16:22,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:22,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:22,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979065192] [2019-11-28 21:16:22,002 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 21:16:22,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:22,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469148572] [2019-11-28 21:16:22,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:22,018 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:22,147 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:22,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:22,147 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:22,147 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:22,148 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:22,148 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,148 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:22,148 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:22,148 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2019-11-28 21:16:22,148 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:22,149 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:22,151 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 21:16:22,166 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 21:16:22,171 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 21:16:22,174 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 21:16:22,231 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:22,231 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) [2019-11-28 21:16:22,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:22,247 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:22,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:22,271 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,791 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:22,794 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:22,794 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:22,794 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:22,794 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:22,794 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:22,794 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,795 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:22,795 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:22,795 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2019-11-28 21:16:22,795 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:22,795 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:22,797 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 21:16:22,803 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 21:16:22,816 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 21:16:22,819 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 21:16:22,873 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:22,873 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 21:16:22,881 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 21:16:22,884 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:22,884 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:22,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:22,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:22,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:22,886 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:22,886 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,889 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 21:16:22,902 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 21:16:22,904 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:22,905 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:22,905 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:22,905 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:22,905 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:22,908 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:22,908 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 21:16:22,913 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:22,920 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:22,920 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) [2019-11-28 21:16:22,926 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:22,926 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:22,926 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:22,927 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:22,930 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:22,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 21:16:23,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:23,112 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 21:16:23,113 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 21:16:23,113 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 21:16:23,309 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 21:16:23,310 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 21:16:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 21:16:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 21:16:23,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 21:16:23,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:23,312 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 21:16:23,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:23,313 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 21:16:23,314 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:23,314 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 21:16:23,331 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:23,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 21:16:23,343 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 21:16:23,344 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:23,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 21:16:23,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:23,348 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 21:16:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 21:16:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 21:16:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 21:16:23,382 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 21:16:23,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 21:16:23,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 21:16:23,384 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 21:16:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:23,551 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 21:16:23,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 21:16:23,554 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 21:16:23,558 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:23,562 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 21:16:23,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 21:16:23,563 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:23,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 21:16:23,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:23,563 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 21:16:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 21:16:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 21:16:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 21:16:23,577 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:23,577 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:23,577 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 21:16:23,577 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:23,600 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:23,600 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:23,600 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:23,602 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:23,602 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 21:16:23,603 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 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 21:16:23,603 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 21:16:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 21:16:23,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:23,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42277337] [2019-11-28 21:16:23,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,781 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 21:16:23,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42277337] [2019-11-28 21:16:23,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70529502] [2019-11-28 21:16:23,783 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) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 21:16:23,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:23,834 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 21:16:23,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:23,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 21:16:23,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619682315] [2019-11-28 21:16:23,836 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 21:16:23,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:23,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421110037] [2019-11-28 21:16:23,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,939 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 21:16:23,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421110037] [2019-11-28 21:16:23,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454192423] [2019-11-28 21:16:23,941 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 21:16:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:23,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:24,034 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 21:16:24,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:24,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 21:16:24,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766064979] [2019-11-28 21:16:24,035 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:24,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:24,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 21:16:24,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 21:16:24,036 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 21:16:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:24,289 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 21:16:24,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 21:16:24,290 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 21:16:24,293 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:24,297 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 21:16:24,297 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 21:16:24,298 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 21:16:24,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 21:16:24,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:24,298 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 21:16:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 21:16:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 21:16:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 21:16:24,319 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:24,319 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:24,319 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 21:16:24,320 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 21:16:24,322 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:24,322 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:24,322 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:24,327 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:24,328 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 21:16:24,328 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 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 21:16:24,329 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 21:16:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 21:16:24,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:24,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473582390] [2019-11-28 21:16:24,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,512 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 21:16:24,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473582390] [2019-11-28 21:16:24,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574000844] [2019-11-28 21:16:24,513 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 21:16:24,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:24,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:24,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:24,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:24,606 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 21:16:24,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:24,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 21:16:24,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814715717] [2019-11-28 21:16:24,607 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 21:16:24,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:24,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664204866] [2019-11-28 21:16:24,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:24,619 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:24,896 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:24,897 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:24,897 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:24,897 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:24,897 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:24,897 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:24,897 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:24,897 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:24,897 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2019-11-28 21:16:24,897 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:24,897 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:24,898 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 21:16:24,901 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 21:16:24,905 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 21:16:24,907 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 21:16:24,984 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:24,984 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 21:16:24,989 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:24,989 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:24,992 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:24,992 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) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:24,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:24,999 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:25,002 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:25,002 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) [2019-11-28 21:16:25,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:25,014 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:25,018 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:25,018 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) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:25,027 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:25,027 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 21:16:25,039 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:25,039 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 21:16:25,561 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:25,564 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:25,564 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:25,564 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:25,564 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:25,564 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:25,564 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:25,564 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:25,564 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:25,565 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2019-11-28 21:16:25,565 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:25,565 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:25,566 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 21:16:25,571 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 21:16:25,574 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 21:16:25,584 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 21:16:25,671 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:25,672 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) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:25,677 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 21:16:25,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:25,679 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:25,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:25,680 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:25,680 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:25,680 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:25,681 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:25,683 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 21:16:25,688 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 21:16:25,689 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:25,689 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:25,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:25,689 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:25,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:25,690 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:25,690 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:25,692 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 21:16:25,698 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 21:16:25,699 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:25,699 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:25,699 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:25,699 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:25,700 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:25,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:25,702 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:25,711 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:25,713 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:25,714 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 21:16:25,718 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:25,719 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:25,719 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:25,719 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:25,721 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 21:16:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:25,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:25,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:25,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:25,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:25,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:25,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:25,914 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 21:16:25,915 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 21:16:25,915 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:26,130 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 21:16:26,131 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 21:16:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 21:16:26,133 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:26,133 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:26,133 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:26,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,306 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 21:16:26,307 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 21:16:26,307 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:26,494 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 21:16:26,495 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 21:16:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 21:16:26,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:26,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:26,497 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,685 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 21:16:26,686 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 21:16:26,686 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:27,019 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 21:16:27,020 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 21:16:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 21:16:27,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:27,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 21:16:27,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 21:16:27,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 21:16:27,047 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 21:16:27,064 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 21:16:27,065 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 21:16:27,066 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 21:16:27,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 21:16:27,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:27,068 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 21:16:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 21:16:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 21:16:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 21:16:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 21:16:27,113 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 21:16:27,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 21:16:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 21:16:27,114 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 21:16:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:27,417 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 21:16:27,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 21:16:27,419 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 21:16:27,428 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:27,439 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 21:16:27,439 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 21:16:27,440 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 21:16:27,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 21:16:27,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:27,442 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 21:16:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 21:16:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 21:16:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 21:16:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 21:16:27,477 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:27,478 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:27,478 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 21:16:27,478 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 21:16:27,482 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:27,482 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:27,483 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:27,484 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:27,484 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:27,485 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4846#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4951#fiboEXIT >#32#return; 4930#L11-1 call #t~ret1 := fibo(~n - 2);< 4938#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4955#L8 assume !(1 == ~n); 4956#L11 call #t~ret0 := fibo(~n - 1);< 4965#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 21:16:27,485 INFO L796 eck$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 21:16:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 21:16:27,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:27,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905747276] [2019-11-28 21:16:27,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:27,731 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 21:16:27,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905747276] [2019-11-28 21:16:27,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135135587] [2019-11-28 21:16:27,732 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 21:16:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:27,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:27,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:27,793 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 21:16:27,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:27,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 21:16:27,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732375708] [2019-11-28 21:16:27,794 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 21:16:27,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:27,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471845911] [2019-11-28 21:16:27,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:27,800 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:27,831 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:27,831 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:27,831 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:27,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:27,832 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:27,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:27,832 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:27,832 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:27,832 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2019-11-28 21:16:27,832 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:27,832 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:27,833 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 21:16:27,836 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 21:16:27,838 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 21:16:27,839 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 21:16:27,845 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 21:16:27,880 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:27,880 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) [2019-11-28 21:16:27,898 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:27,898 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:27,903 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:27,904 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) [2019-11-28 21:16:27,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:27,912 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:27,916 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:27,916 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) [2019-11-28 21:16:27,923 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:27,924 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:27,927 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:27,928 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) [2019-11-28 21:16:27,935 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:27,935 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 37 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:27,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:27,950 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,015 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:28,019 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:28,019 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:28,019 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:28,020 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:28,020 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:28,020 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,020 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:28,020 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:28,020 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2019-11-28 21:16:28,020 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:28,020 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:28,021 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 21:16:28,025 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 21:16:28,026 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 21:16:28,029 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 21:16:28,035 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 21:16:28,077 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:28,078 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 21:16:28,090 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 21:16:28,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,091 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,093 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 21:16:28,100 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 21:16:28,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,102 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,102 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,103 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 21:16:28,110 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 21:16:28,111 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,111 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,111 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,111 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,112 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,112 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,112 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,116 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) [2019-11-28 21:16:28,127 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 21:16:28,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,128 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,129 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,129 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,129 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,133 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:28,136 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:28,136 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) [2019-11-28 21:16:28,142 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:28,142 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:28,142 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:28,142 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,144 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,252 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 21:16:28,252 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 21:16:28,252 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:28,340 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 21:16:28,340 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 21:16:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:28,341 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:28,342 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:28,342 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,452 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 21:16:28,453 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 21:16:28,453 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:28,528 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 21:16:28,529 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 21:16:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:28,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:28,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:28,530 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,648 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 21:16:28,649 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 21:16:28,649 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:28,750 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 21:16:28,751 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 21:16:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 21:16:28,752 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:28,752 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:28,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 21:16:28,753 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:28,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 21:16:28,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:28,754 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 21:16:28,764 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:28,775 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 21:16:28,775 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 21:16:28,776 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 21:16:28,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 21:16:28,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:28,777 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 21:16:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 21:16:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 21:16:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 21:16:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 21:16:28,799 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 21:16:28,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 21:16:28,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 21:16:28,800 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 21:16:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:29,148 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 21:16:29,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 21:16:29,149 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 21:16:29,158 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:29,169 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 21:16:29,170 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 21:16:29,170 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 21:16:29,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 21:16:29,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:29,171 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 21:16:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 21:16:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 21:16:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 21:16:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 21:16:29,195 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:29,195 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:29,196 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 21:16:29,196 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 21:16:29,200 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:29,200 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:29,201 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:29,202 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:29,202 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:29,202 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 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 21:16:29,202 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 21:16:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 21:16:29,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:29,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134118759] [2019-11-28 21:16:29,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:29,453 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 21:16:29,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134118759] [2019-11-28 21:16:29,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543549459] [2019-11-28 21:16:29,453 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 21:16:29,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:29,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:29,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:29,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:29,509 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 21:16:29,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:29,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 24 [2019-11-28 21:16:29,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452664452] [2019-11-28 21:16:29,511 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 21:16:29,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:29,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859176095] [2019-11-28 21:16:29,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:29,520 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:29,565 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:29,566 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:29,566 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:29,566 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:29,566 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:29,566 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:29,567 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:29,567 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:29,567 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2019-11-28 21:16:29,567 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:29,567 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:29,568 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 21:16:29,570 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 21:16:29,571 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 21:16:29,574 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 21:16:29,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:29,642 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 21:16:29,648 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:29,648 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:29,653 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:29,653 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 21:16:29,658 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:29,658 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:29,661 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:29,661 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 [2019-11-28 21:16:29,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:29,668 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:29,671 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:29,671 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 21:16:29,678 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:29,678 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 21:16:29,689 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:29,690 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:35,292 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:35,294 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:35,294 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:35,294 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:35,294 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:35,294 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:35,294 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:35,295 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:35,295 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:35,295 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2019-11-28 21:16:35,295 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:35,295 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:35,296 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 21:16:35,297 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 21:16:35,299 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 21:16:35,300 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 21:16:35,367 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:35,367 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) [2019-11-28 21:16:35,373 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 21:16:35,375 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:35,375 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:35,375 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:35,376 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:35,376 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:35,377 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:35,377 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:35,379 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) [2019-11-28 21:16:35,385 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 21:16:35,387 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:35,387 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:35,388 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:35,388 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:35,388 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:35,389 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:35,389 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:35,391 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) [2019-11-28 21:16:35,397 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 21:16:35,399 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:35,400 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:35,400 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:35,400 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:35,400 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:35,401 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:35,401 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:35,404 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) [2019-11-28 21:16:35,415 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 21:16:35,417 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:35,417 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:35,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:35,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:35,418 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:35,419 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:35,419 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:35,422 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:35,427 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:35,427 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 21:16:35,434 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:35,434 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:35,434 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:35,435 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:35,436 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:35,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:16:35,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:35,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:35,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:35,597 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 21:16:35,597 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 21:16:35,597 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:16:35,663 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 21:16:35,664 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 21:16:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:35,665 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:16:35,665 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:35,665 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:35,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:16:35,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:35,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:35,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:35,792 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 21:16:35,792 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 21:16:35,792 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:16:35,884 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 21:16:35,884 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 21:16:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:35,885 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:16:35,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:35,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 21:16:35,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:35,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 21:16:35,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:35,887 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 21:16:35,898 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:35,909 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 21:16:35,909 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 21:16:35,910 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 21:16:35,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 21:16:35,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:35,911 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 21:16:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 21:16:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 21:16:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 21:16:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 21:16:35,943 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 21:16:35,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 21:16:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-11-28 21:16:35,945 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 24 states. [2019-11-28 21:16:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:36,352 INFO L93 Difference]: Finished difference Result 794 states and 1182 transitions. [2019-11-28 21:16:36,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 21:16:36,353 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 794 states and 1182 transitions. [2019-11-28 21:16:36,364 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:36,374 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 794 states to 779 states and 1160 transitions. [2019-11-28 21:16:36,375 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 283 [2019-11-28 21:16:36,375 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 283 [2019-11-28 21:16:36,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 779 states and 1160 transitions. [2019-11-28 21:16:36,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:36,376 INFO L688 BuchiCegarLoop]: Abstraction has 779 states and 1160 transitions. [2019-11-28 21:16:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states and 1160 transitions. [2019-11-28 21:16:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2019-11-28 21:16:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 21:16:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 21:16:36,400 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:36,400 INFO L591 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:36,401 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 21:16:36,401 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 761 states and 1128 transitions. [2019-11-28 21:16:36,406 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:36,406 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:36,407 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:36,408 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:36,408 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:36,408 INFO L794 eck$LassoCheckResult]: Stem: 12464#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 12465#L25 call main_#t~ret2 := fibo(main_~x~0);< 12492#fiboENTRY ~n := #in~n; 12553#L6 assume !(~n < 1); 12554#L8 assume !(1 == ~n); 12548#L11 call #t~ret0 := fibo(~n - 1);< 12549#fiboENTRY ~n := #in~n; 12574#L6 assume !(~n < 1); 12551#L8 assume !(1 == ~n); 12547#L11 call #t~ret0 := fibo(~n - 1);< 12573#fiboENTRY ~n := #in~n; 12571#L6 assume !(~n < 1); 12569#L8 assume !(1 == ~n); 12556#L11 call #t~ret0 := fibo(~n - 1);< 12566#fiboENTRY ~n := #in~n; 12572#L6 assume !(~n < 1); 12570#L8 assume !(1 == ~n); 12561#L11 call #t~ret0 := fibo(~n - 1);< 12568#fiboENTRY ~n := #in~n; 12600#L6 assume !(~n < 1); 12599#L8 assume !(1 == ~n); 12584#L11 call #t~ret0 := fibo(~n - 1);< 12591#fiboENTRY ~n := #in~n; 12630#L6 assume !(~n < 1); 12621#L8 assume !(1 == ~n); 12586#L11 call #t~ret0 := fibo(~n - 1);< 12595#fiboENTRY ~n := #in~n; 12702#L6 assume !(~n < 1); 12693#L8 assume 1 == ~n;#res := 1; 12692#fiboFINAL assume true; 12685#fiboEXIT >#32#return; 12626#L11-1 call #t~ret1 := fibo(~n - 2);< 12628#fiboENTRY ~n := #in~n; 12664#L6 assume ~n < 1;#res := 0; 12659#fiboFINAL assume true; 12625#fiboEXIT >#34#return; 12620#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 12594#fiboFINAL assume true; 12590#fiboEXIT >#32#return; 12585#L11-1 call #t~ret1 := fibo(~n - 2);< 12588#fiboENTRY ~n := #in~n; 12798#L6 assume !(~n < 1); 12796#L8 assume !(1 == ~n); 12792#L11 call #t~ret0 := fibo(~n - 1);< 12793#fiboENTRY ~n := #in~n; 12861#L6 assume !(~n < 1); 12860#L8 assume !(1 == ~n); 12854#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 21:16:36,408 INFO L796 eck$LassoCheckResult]: Loop: 12852#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 21:16:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 21:16:36,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:36,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815018245] [2019-11-28 21:16:36,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:36,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815018245] [2019-11-28 21:16:36,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217612009] [2019-11-28 21:16:36,731 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 21:16:36,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 21:16:36,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:36,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:36,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:36,887 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 21:16:36,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:36,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 30 [2019-11-28 21:16:36,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151755334] [2019-11-28 21:16:36,889 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 21:16:36,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:36,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032910433] [2019-11-28 21:16:36,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:36,894 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:36,933 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:36,933 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:36,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:36,934 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:36,934 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:36,934 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:36,934 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:36,934 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:36,934 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2019-11-28 21:16:36,934 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:36,935 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:36,936 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 21:16:36,946 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 21:16:36,948 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 21:16:36,950 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 21:16:36,998 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:36,998 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) [2019-11-28 21:16:37,013 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:37,013 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 56 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:37,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:37,033 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:39,808 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:39,810 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:39,810 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:39,810 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:39,810 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:39,810 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:39,810 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:39,810 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:39,810 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:39,811 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2019-11-28 21:16:39,811 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:39,811 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:39,811 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 21:16:39,813 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 21:16:39,814 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 21:16:39,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:39,873 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:39,873 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) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:39,882 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 21:16:39,884 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:39,884 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:39,884 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:39,884 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:39,884 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:39,885 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:39,885 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:39,886 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 21:16:39,891 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 21:16:39,893 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:39,893 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:39,893 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:39,893 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:39,893 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:39,893 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:39,894 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:39,895 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 21:16:39,900 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 21:16:39,902 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:39,902 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:39,902 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:39,902 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:39,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:39,903 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:39,903 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:39,910 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 21:16:39,916 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 21:16:39,917 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:39,918 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:39,918 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:39,918 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:39,918 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:39,920 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:39,920 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:39,922 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:39,925 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:39,925 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 21:16:39,928 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:39,928 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:39,928 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:39,928 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:39,930 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:39,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,065 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 21:16:40,065 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 21:16:40,067 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 21:16:40,133 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 783 states and 1151 transitions. Complement of second has 18 states. [2019-11-28 21:16:40,133 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 21:16:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:40,134 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:16:40,135 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,135 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,259 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 21:16:40,260 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 21:16:40,260 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 21:16:40,351 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 964 states and 1362 transitions. Complement of second has 22 states. [2019-11-28 21:16:40,352 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 21:16:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:40,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:16:40,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,353 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,539 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 21:16:40,540 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 21:16:40,540 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 21:16:40,613 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 1029 states and 1473 transitions. Complement of second has 27 states. [2019-11-28 21:16:40,613 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 21:16:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:16:40,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:16:40,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,615 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 21:16:40,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,616 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 21:16:40,616 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,616 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1029 states and 1473 transitions. [2019-11-28 21:16:40,628 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:40,640 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1029 states to 761 states and 1128 transitions. [2019-11-28 21:16:40,641 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2019-11-28 21:16:40,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 264 [2019-11-28 21:16:40,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 761 states and 1128 transitions. [2019-11-28 21:16:40,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:40,642 INFO L688 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states and 1128 transitions. [2019-11-28 21:16:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2019-11-28 21:16:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 21:16:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 21:16:40,669 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:40,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-28 21:16:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-11-28 21:16:40,671 INFO L87 Difference]: Start difference. First operand 761 states and 1128 transitions. Second operand 30 states. [2019-11-28 21:16:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:41,231 INFO L93 Difference]: Finished difference Result 395 states and 515 transitions. [2019-11-28 21:16:41,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 21:16:41,233 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 395 states and 515 transitions. [2019-11-28 21:16:41,238 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:41,246 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 395 states to 361 states and 479 transitions. [2019-11-28 21:16:41,246 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2019-11-28 21:16:41,247 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 167 [2019-11-28 21:16:41,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 479 transitions. [2019-11-28 21:16:41,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:41,248 INFO L688 BuchiCegarLoop]: Abstraction has 361 states and 479 transitions. [2019-11-28 21:16:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states and 479 transitions. [2019-11-28 21:16:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2019-11-28 21:16:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 21:16:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 21:16:41,258 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 21:16:41,258 INFO L591 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 21:16:41,258 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 21:16:41,258 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 317 states and 424 transitions. [2019-11-28 21:16:41,261 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:41,261 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:41,261 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:41,262 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 21:16:41,263 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:41,264 INFO L794 eck$LassoCheckResult]: Stem: 17994#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 17995#L25 call main_#t~ret2 := fibo(main_~x~0);< 18029#fiboENTRY ~n := #in~n; 18120#L6 assume !(~n < 1); 18117#L8 assume !(1 == ~n); 18106#L11 call #t~ret0 := fibo(~n - 1);< 18111#fiboENTRY ~n := #in~n; 18115#L6 assume !(~n < 1); 18113#L8 assume !(1 == ~n); 18108#L11 call #t~ret0 := fibo(~n - 1);< 18109#fiboENTRY ~n := #in~n; 18136#L6 assume !(~n < 1); 18124#L8 assume !(1 == ~n); 18119#L11 call #t~ret0 := fibo(~n - 1);< 18122#fiboENTRY ~n := #in~n; 18147#L6 assume !(~n < 1); 18145#L8 assume !(1 == ~n); 18002#L11 call #t~ret0 := fibo(~n - 1);< 18009#fiboENTRY ~n := #in~n; 18010#L6 assume !(~n < 1); 18001#L8 assume !(1 == ~n); 18003#L11 call #t~ret0 := fibo(~n - 1);< 18139#fiboENTRY ~n := #in~n; 18189#L6 assume !(~n < 1); 18177#L8 assume !(1 == ~n); 18012#L11 call #t~ret0 := fibo(~n - 1);< 18139#fiboENTRY ~n := #in~n; 18189#L6 assume !(~n < 1); 18177#L8 assume !(1 == ~n); 18012#L11 call #t~ret0 := fibo(~n - 1);< 18139#fiboENTRY ~n := #in~n; 18189#L6 assume !(~n < 1); 18177#L8 assume !(1 == ~n); 18012#L11 call #t~ret0 := fibo(~n - 1);< 18171#fiboENTRY ~n := #in~n; 18296#L6 assume !(~n < 1); 18295#L8 assume 1 == ~n;#res := 1; 18294#fiboFINAL assume true; 18293#fiboEXIT >#32#return; 18011#L11-1 call #t~ret1 := fibo(~n - 2);< 18013#fiboENTRY ~n := #in~n; 18243#L6 assume ~n < 1;#res := 0; 18234#fiboFINAL assume true; 18218#fiboEXIT >#34#return; 18204#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 18201#fiboFINAL assume true; 18200#fiboEXIT >#32#return; 18186#L11-1 call #t~ret1 := fibo(~n - 2);< 18188#fiboENTRY ~n := #in~n; 18197#L6 assume !(~n < 1); 18196#L8 assume 1 == ~n;#res := 1; 18179#fiboFINAL assume true; 18185#fiboEXIT >#34#return; 18176#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 18170#fiboFINAL assume true; 18167#fiboEXIT >#32#return; 18131#L11-1 call #t~ret1 := fibo(~n - 2);< 18134#fiboENTRY ~n := #in~n; 18198#L6 assume !(~n < 1); 18178#L8 assume !(1 == ~n); 17985#L11 call #t~ret0 := fibo(~n - 1);< 18093#fiboENTRY ~n := #in~n; 18086#L6 assume !(~n < 1); 18087#L8 assume !(1 == ~n); 18046#L11 call #t~ret0 := fibo(~n - 1);< 18050#fiboENTRY ~n := #in~n; 18071#L6 assume !(~n < 1); 18070#L8 assume !(1 == ~n); 18049#L11 [2019-11-28 21:16:41,264 INFO L796 eck$LassoCheckResult]: Loop: 18049#L11 call #t~ret0 := fibo(~n - 1);< 18050#fiboENTRY ~n := #in~n; 18071#L6 assume !(~n < 1); 18070#L8 assume !(1 == ~n); 18049#L11 [2019-11-28 21:16:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1455011085, now seen corresponding path program 4 times [2019-11-28 21:16:41,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:41,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938641002] [2019-11-28 21:16:41,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 37 proven. 271 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-28 21:16:41,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938641002] [2019-11-28 21:16:41,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131079792] [2019-11-28 21:16:41,676 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:41,709 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 21:16:41,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:41,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:16:41,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-28 21:16:41,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:41,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 28 [2019-11-28 21:16:41,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626594867] [2019-11-28 21:16:41,748 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2019-11-28 21:16:41,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:41,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562648846] [2019-11-28 21:16:41,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:41,752 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:41,789 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:41,789 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:41,790 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:41,790 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:41,790 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:41,790 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:41,790 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:41,790 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:41,790 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2019-11-28 21:16:41,791 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:41,791 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:41,792 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 21:16:41,793 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 21:16:41,799 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 21:16:41,807 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 21:16:41,849 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:41,849 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:41,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:41,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:41,866 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:41,866 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:41,873 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:41,874 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:41,877 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:41,877 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:41,884 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:41,884 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 66 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:41,897 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:41,897 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,608 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:44,610 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:44,610 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:44,610 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:44,610 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:44,610 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:44,610 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,610 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:44,610 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:44,611 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2019-11-28 21:16:44,611 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:44,611 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:44,612 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 21:16:44,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,625 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 21:16:44,661 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:44,662 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,666 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 21:16:44,668 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,668 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,668 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,668 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,668 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,669 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,669 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:44,670 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,675 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 21:16:44,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,677 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,677 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,677 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:44,678 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,684 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 21:16:44,686 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,686 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,686 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,687 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,687 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,688 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,688 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:44,690 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:44,693 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:44,693 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,697 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:44,697 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:44,697 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:44,698 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:44,699 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:44,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 21:16:44,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:44,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:44,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:44,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:44,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:44,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:44,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:44,855 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 21:16:44,855 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 21:16:44,855 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 21:16:44,918 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 336 states and 444 transitions. Complement of second has 18 states. [2019-11-28 21:16:44,918 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 21:16:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:44,919 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 21:16:44,919 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:44,919 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,070 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 21:16:45,070 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 21:16:45,071 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 21:16:45,159 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 342 states and 450 transitions. Complement of second has 17 states. [2019-11-28 21:16:45,160 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 21:16:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:45,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 21:16:45,161 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:45,161 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,308 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 21:16:45,308 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 21:16:45,308 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 21:16:45,377 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 423 states and 554 transitions. Complement of second has 27 states. [2019-11-28 21:16:45,382 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 21:16:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:16:45,383 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 21:16:45,383 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:45,383 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:45,384 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:45,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 8 letters. [2019-11-28 21:16:45,385 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:45,385 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 423 states and 554 transitions. [2019-11-28 21:16:45,389 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:45,393 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 423 states to 325 states and 434 transitions. [2019-11-28 21:16:45,393 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2019-11-28 21:16:45,393 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2019-11-28 21:16:45,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 325 states and 434 transitions. [2019-11-28 21:16:45,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:45,394 INFO L688 BuchiCegarLoop]: Abstraction has 325 states and 434 transitions. [2019-11-28 21:16:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states and 434 transitions. [2019-11-28 21:16:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2019-11-28 21:16:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 21:16:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 21:16:45,403 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 21:16:45,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:45,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-28 21:16:45,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-11-28 21:16:45,404 INFO L87 Difference]: Start difference. First operand 317 states and 424 transitions. Second operand 28 states. [2019-11-28 21:16:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:46,059 INFO L93 Difference]: Finished difference Result 412 states and 550 transitions. [2019-11-28 21:16:46,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 21:16:46,060 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 412 states and 550 transitions. [2019-11-28 21:16:46,064 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:46,069 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 412 states to 404 states and 536 transitions. [2019-11-28 21:16:46,070 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2019-11-28 21:16:46,070 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2019-11-28 21:16:46,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 404 states and 536 transitions. [2019-11-28 21:16:46,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,071 INFO L688 BuchiCegarLoop]: Abstraction has 404 states and 536 transitions. [2019-11-28 21:16:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states and 536 transitions. [2019-11-28 21:16:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 359. [2019-11-28 21:16:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 21:16:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 21:16:46,085 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 21:16:46,085 INFO L591 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 21:16:46,086 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-28 21:16:46,086 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 480 transitions. [2019-11-28 21:16:46,088 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:46,088 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:46,088 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:46,096 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 21:16:46,097 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:46,097 INFO L794 eck$LassoCheckResult]: Stem: 21207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 21208#L25 call main_#t~ret2 := fibo(main_~x~0);< 21235#fiboENTRY ~n := #in~n; 21343#L6 assume !(~n < 1); 21341#L8 assume !(1 == ~n); 21334#L11 call #t~ret0 := fibo(~n - 1);< 21338#fiboENTRY ~n := #in~n; 21342#L6 assume !(~n < 1); 21339#L8 assume !(1 == ~n); 21318#L11 call #t~ret0 := fibo(~n - 1);< 21336#fiboENTRY ~n := #in~n; 21499#L6 assume !(~n < 1); 21495#L8 assume !(1 == ~n); 21321#L11 call #t~ret0 := fibo(~n - 1);< 21323#fiboENTRY ~n := #in~n; 21364#L6 assume !(~n < 1); 21361#L8 assume !(1 == ~n); 21348#L11 call #t~ret0 := fibo(~n - 1);< 21357#fiboENTRY ~n := #in~n; 21411#L6 assume !(~n < 1); 21401#L8 assume !(1 == ~n); 21394#L11 call #t~ret0 := fibo(~n - 1);< 21397#fiboENTRY ~n := #in~n; 21424#L6 assume !(~n < 1); 21417#L8 assume !(1 == ~n); 21226#L11 call #t~ret0 := fibo(~n - 1);< 21414#fiboENTRY ~n := #in~n; 21434#L6 assume !(~n < 1); 21433#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21414#fiboENTRY ~n := #in~n; 21434#L6 assume !(~n < 1); 21433#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21414#fiboENTRY ~n := #in~n; 21434#L6 assume !(~n < 1); 21433#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21419#fiboENTRY ~n := #in~n; 21551#L6 assume !(~n < 1); 21550#L8 assume 1 == ~n;#res := 1; 21549#fiboFINAL assume true; 21548#fiboEXIT >#32#return; 21224#L11-1 call #t~ret1 := fibo(~n - 2);< 21227#fiboENTRY ~n := #in~n; 21535#L6 assume ~n < 1;#res := 0; 21534#fiboFINAL assume true; 21533#fiboEXIT >#34#return; 21531#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 21529#fiboFINAL assume true; 21528#fiboEXIT >#32#return; 21239#L11-1 call #t~ret1 := fibo(~n - 2);< 21525#fiboENTRY ~n := #in~n; 21546#L6 assume !(~n < 1); 21544#L8 assume 1 == ~n;#res := 1; 21422#fiboFINAL assume true; 21522#fiboEXIT >#34#return; 21521#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 21460#fiboFINAL assume true; 21403#fiboEXIT >#32#return; 21237#L11-1 call #t~ret1 := fibo(~n - 2);< 21409#fiboENTRY ~n := #in~n; 21541#L6 assume !(~n < 1); 21421#L8 assume !(1 == ~n); 21243#L11 call #t~ret0 := fibo(~n - 1);< 21306#fiboENTRY ~n := #in~n; 21299#L6 assume !(~n < 1); 21300#L8 assume !(1 == ~n); 21260#L11 call #t~ret0 := fibo(~n - 1);< 21262#fiboENTRY ~n := #in~n; 21284#L6 assume !(~n < 1); 21280#L8 assume !(1 == ~n); 21261#L11 [2019-11-28 21:16:46,097 INFO L796 eck$LassoCheckResult]: Loop: 21261#L11 call #t~ret0 := fibo(~n - 1);< 21262#fiboENTRY ~n := #in~n; 21284#L6 assume !(~n < 1); 21280#L8 assume !(1 == ~n); 21261#L11 [2019-11-28 21:16:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1736707112, now seen corresponding path program 5 times [2019-11-28 21:16:46,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143758119] [2019-11-28 21:16:46,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 218 proven. 112 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-28 21:16:46,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143758119] [2019-11-28 21:16:46,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394476465] [2019-11-28 21:16:46,454 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:46,500 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-28 21:16:46,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:46,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-28 21:16:46,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:46,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 25 [2019-11-28 21:16:46,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808533674] [2019-11-28 21:16:46,569 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2019-11-28 21:16:46,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954226130] [2019-11-28 21:16:46,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:46,577 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:46,618 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:46,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:46,619 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:46,619 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:46,619 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:46,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:46,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:46,619 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2019-11-28 21:16:46,619 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:46,620 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:46,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,624 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 21:16:46,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,628 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 21:16:46,683 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:46,683 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,688 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:46,688 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:46,691 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:46,691 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,696 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:46,697 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:46,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:46,703 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,709 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:46,709 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:46,712 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:46,712 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,717 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:46,717 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,728 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:46,728 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:56,918 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:56,921 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:56,921 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:56,921 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:56,921 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:56,922 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:56,922 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:56,922 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:56,922 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:56,922 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2019-11-28 21:16:56,922 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:56,922 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:56,923 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 21:16:56,925 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 21:16:56,927 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 21:16:56,938 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 21:16:56,990 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:56,990 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:57,020 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 21:16:57,022 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:57,022 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:57,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:57,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:57,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:57,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:57,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:57,024 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:57,030 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 21:16:57,031 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:57,031 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:57,031 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:57,031 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:57,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:57,032 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:57,032 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:57,033 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:57,040 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 21:16:57,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:57,042 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:57,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:57,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:57,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:57,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:57,043 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:57,045 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:57,048 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:57,048 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:57,051 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:57,051 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:57,051 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:57,052 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:57,054 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:57,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 21:16:57,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:57,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:57,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:57,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:57,193 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 21:16:57,193 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 21:16:57,193 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 21:16:57,258 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 381 states and 503 transitions. Complement of second has 18 states. [2019-11-28 21:16:57,258 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 21:16:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:57,259 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:57,259 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:57,259 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:57,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 21:16:57,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:57,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:57,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:57,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:57,422 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 21:16:57,423 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 21:16:57,423 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 21:16:57,501 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 387 states and 509 transitions. Complement of second has 17 states. [2019-11-28 21:16:57,501 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 21:16:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:57,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:57,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:57,502 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:57,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 21:16:57,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:57,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:57,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:57,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:57,651 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 21:16:57,651 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 21:16:57,651 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 21:16:57,716 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 490 states and 640 transitions. Complement of second has 27 states. [2019-11-28 21:16:57,716 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 21:16:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:16:57,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:57,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:57,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 76 letters. Loop has 4 letters. [2019-11-28 21:16:57,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:57,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 8 letters. [2019-11-28 21:16:57,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:57,719 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 490 states and 640 transitions. [2019-11-28 21:16:57,724 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:57,731 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 490 states to 371 states and 494 transitions. [2019-11-28 21:16:57,732 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 127 [2019-11-28 21:16:57,732 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2019-11-28 21:16:57,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 371 states and 494 transitions. [2019-11-28 21:16:57,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:57,734 INFO L688 BuchiCegarLoop]: Abstraction has 371 states and 494 transitions. [2019-11-28 21:16:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states and 494 transitions. [2019-11-28 21:16:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 359. [2019-11-28 21:16:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 21:16:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 21:16:57,749 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 21:16:57,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 21:16:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2019-11-28 21:16:57,751 INFO L87 Difference]: Start difference. First operand 359 states and 480 transitions. Second operand 25 states. [2019-11-28 21:16:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:58,438 INFO L93 Difference]: Finished difference Result 495 states and 691 transitions. [2019-11-28 21:16:58,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-28 21:16:58,439 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 691 transitions. [2019-11-28 21:16:58,445 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:58,445 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 0 states and 0 transitions. [2019-11-28 21:16:58,445 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:16:58,446 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:16:58,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:16:58,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:16:58,446 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:58,446 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:58,446 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:58,447 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-28 21:16:58,447 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 21:16:58,447 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:58,447 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 21:16:58,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 09:16:58 BoogieIcfgContainer [2019-11-28 21:16:58,456 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 21:16:58,457 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 21:16:58,457 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 21:16:58,457 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 21:16:58,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:20" (3/4) ... [2019-11-28 21:16:58,464 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 21:16:58,464 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 21:16:58,467 INFO L168 Benchmark]: Toolchain (without parser) took 38881.02 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 383.8 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 214.4 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:58,468 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:58,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.84 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 942.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:58,476 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:58,476 INFO L168 Benchmark]: Boogie Preprocessor took 78.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:58,477 INFO L168 Benchmark]: RCFGBuilder took 206.50 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:58,477 INFO L168 Benchmark]: BuchiAutomizer took 38272.21 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 247.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -9.5 MB). Peak memory consumption was 238.0 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:58,478 INFO L168 Benchmark]: Witness Printer took 7.80 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:58,485 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.84 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 942.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.50 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 38272.21 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 247.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -9.5 MB). Peak memory consumption was 238.0 MB. Max. memory is 11.5 GB. * Witness Printer took 7.80 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 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 17 terminating modules (9 trivial, 3 deterministic, 5 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. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 30 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 38.2s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 28.7s. Construction of modules took 2.5s. Büchi inclusion checks took 5.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 16. Automata minimization 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 402 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 761 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 350 SDtfs, 971 SDslu, 849 SDs, 0 SdLazy, 2854 SolverSat, 701 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp96 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp77 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 22.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...