./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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_5-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 063966206f80cef10873a8e49ae0985aad7f65cb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 05:44:46,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 05:44:46,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 05:44:46,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 05:44:46,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 05:44:46,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 05:44:46,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 05:44:46,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 05:44:46,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 05:44:46,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 05:44:46,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 05:44:46,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 05:44:46,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 05:44:46,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 05:44:46,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 05:44:46,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 05:44:46,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 05:44:46,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 05:44:46,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 05:44:46,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 05:44:46,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 05:44:46,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 05:44:46,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 05:44:46,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 05:44:46,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 05:44:46,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 05:44:46,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 05:44:46,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 05:44:46,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 05:44:46,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 05:44:46,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 05:44:46,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 05:44:46,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 05:44:46,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 05:44:46,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 05:44:46,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 05:44:46,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 05:44:46,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 05:44:46,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 05:44:46,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 05:44:46,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 05:44:46,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-26 05:44:46,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 05:44:46,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 05:44:46,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 05:44:46,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 05:44:46,412 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 05:44:46,412 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 05:44:46,412 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 05:44:46,413 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 05:44:46,413 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 05:44:46,413 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 05:44:46,413 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 05:44:46,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 05:44:46,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 05:44:46,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 05:44:46,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 05:44:46,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 05:44:46,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 05:44:46,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 05:44:46,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 05:44:46,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 05:44:46,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 05:44:46,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 05:44:46,417 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 05:44:46,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 05:44:46,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 05:44:46,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 05:44:46,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 05:44:46,419 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 05:44:46,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 05:44:46,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 05:44:46,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 05:44:46,420 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 05:44:46,422 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 05:44:46,422 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 063966206f80cef10873a8e49ae0985aad7f65cb [2020-10-26 05:44:46,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 05:44:46,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 05:44:46,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 05:44:46,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 05:44:46,907 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 05:44:46,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-10-26 05:44:46,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/331585149/27fe0abaa61b45e6b67b5cae31d3a85e/FLAGa17562401 [2020-10-26 05:44:47,686 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 05:44:47,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-10-26 05:44:47,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/331585149/27fe0abaa61b45e6b67b5cae31d3a85e/FLAGa17562401 [2020-10-26 05:44:48,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/331585149/27fe0abaa61b45e6b67b5cae31d3a85e [2020-10-26 05:44:48,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 05:44:48,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 05:44:48,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 05:44:48,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 05:44:48,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 05:44:48,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5628ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48, skipping insertion in model container [2020-10-26 05:44:48,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 05:44:48,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 05:44:48,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 05:44:48,231 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 05:44:48,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 05:44:48,261 INFO L208 MainTranslator]: Completed translation [2020-10-26 05:44:48,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48 WrapperNode [2020-10-26 05:44:48,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 05:44:48,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 05:44:48,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 05:44:48,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 05:44:48,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 05:44:48,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 05:44:48,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 05:44:48,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 05:44:48,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (1/1) ... [2020-10-26 05:44:48,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 05:44:48,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 05:44:48,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 05:44:48,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 05:44:48,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (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 [2020-10-26 05:44:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 05:44:48,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 05:44:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 05:44:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 05:44:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-26 05:44:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-26 05:44:48,624 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 05:44:48,624 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 05:44:48,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 05:44:48 BoogieIcfgContainer [2020-10-26 05:44:48,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 05:44:48,627 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 05:44:48,628 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 05:44:48,631 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 05:44:48,632 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 05:44:48,633 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 05:44:48" (1/3) ... [2020-10-26 05:44:48,634 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@667fb559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 05:44:48, skipping insertion in model container [2020-10-26 05:44:48,634 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 05:44:48,634 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 05:44:48" (2/3) ... [2020-10-26 05:44:48,635 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@667fb559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 05:44:48, skipping insertion in model container [2020-10-26 05:44:48,635 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 05:44:48,635 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 05:44:48" (3/3) ... [2020-10-26 05:44:48,637 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2020-10-26 05:44:48,771 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 05:44:48,771 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 05:44:48,771 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 05:44:48,774 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 05:44:48,774 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 05:44:48,774 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 05:44:48,775 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 05:44:48,775 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 05:44:48,791 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-26 05:44:48,830 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:48,830 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:48,831 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:48,840 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 05:44:48,840 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:48,841 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 05:44:48,841 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-26 05:44:48,847 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:48,847 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:48,847 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:48,848 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 05:44:48,848 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:48,857 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-26 05:44:48,860 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-26 05:44:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-26 05:44:48,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:48,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165131845] [2020-10-26 05:44:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:49,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:49,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:49,153 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-26 05:44:49,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:49,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594966503] [2020-10-26 05:44:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:49,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:49,168 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:49,170 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-26 05:44:49,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:49,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638660067] [2020-10-26 05:44:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:49,202 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:49,219 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:49,225 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:49,421 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:49,422 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:49,422 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:49,422 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:49,422 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:49,422 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:49,423 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:49,423 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:49,423 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2020-10-26 05:44:49,423 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:49,423 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:49,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,558 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:49,559 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) [2020-10-26 05:44:49,569 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:49,569 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 [2020-10-26 05:44:49,579 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:49,580 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) [2020-10-26 05:44:49,622 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:49,622 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:49,627 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:49,627 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) [2020-10-26 05:44:49,671 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:49,671 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:49,676 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:49,676 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=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) [2020-10-26 05:44:49,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:49,718 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:49,723 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:49,723 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=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) [2020-10-26 05:44:49,762 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:49,762 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:49,807 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:49,807 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 [2020-10-26 05:44:49,874 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:49,877 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:49,877 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:49,878 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:49,878 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:49,878 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:49,878 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:49,878 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:49,878 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:49,878 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2020-10-26 05:44:49,879 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:49,879 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:49,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,903 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:49,982 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:49,988 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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:49,995 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 [2020-10-26 05:44:49,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:50,000 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:50,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:50,001 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:50,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:50,004 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:50,005 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:50,008 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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:50,051 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 [2020-10-26 05:44:50,053 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:50,053 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:50,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:50,054 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:50,054 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:50,058 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:50,059 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:50,067 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) [2020-10-26 05:44:50,120 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 [2020-10-26 05:44:50,122 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:50,123 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:50,123 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:50,123 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:50,123 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:50,125 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:50,125 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:50,128 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:50,182 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-26 05:44:50,185 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:50,185 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:50,185 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:50,185 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:50,185 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:50,187 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:50,187 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:50,189 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) [2020-10-26 05:44:50,234 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 [2020-10-26 05:44:50,236 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:50,236 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:50,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:50,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:50,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:50,238 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:50,239 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 [2020-10-26 05:44:50,245 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:50,252 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:50,252 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) [2020-10-26 05:44:50,262 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:50,263 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:50,263 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:50,264 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:50,299 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 05:44:50,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:50,568 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 [2020-10-26 05:44:50,570 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-26 05:44:50,734 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-26 05:44:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 05:44:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-26 05:44:50,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-26 05:44:50,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:50,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-26 05:44:50,748 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:50,748 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-26 05:44:50,749 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:50,750 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-26 05:44:50,763 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:50,775 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-26 05:44:50,776 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-26 05:44:50,777 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-26 05:44:50,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-26 05:44:50,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:50,778 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-26 05:44:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-26 05:44:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-26 05:44:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-26 05:44:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-26 05:44:50,819 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-26 05:44:50,820 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-26 05:44:50,820 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-26 05:44:50,820 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-26 05:44:50,821 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:50,821 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:50,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:50,822 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:50,823 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:50,823 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-26 05:44:50,823 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-26 05:44:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-26 05:44:50,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:50,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640669706] [2020-10-26 05:44:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:50,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 05:44:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 05:44:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640669706] [2020-10-26 05:44:50,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 05:44:50,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 05:44:50,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715164201] [2020-10-26 05:44:50,932 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-26 05:44:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689738360] [2020-10-26 05:44:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:50,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-26 05:44:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 05:44:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689738360] [2020-10-26 05:44:50,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 05:44:50,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 05:44:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942968164] [2020-10-26 05:44:50,985 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-26 05:44:50,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:50,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 05:44:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 05:44:50,991 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-26 05:44:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:51,081 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-26 05:44:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 05:44:51,083 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-26 05:44:51,085 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:51,086 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-26 05:44:51,087 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-26 05:44:51,087 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-26 05:44:51,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-26 05:44:51,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:51,088 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-26 05:44:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-26 05:44:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 05:44:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 05:44:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-26 05:44:51,093 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-26 05:44:51,093 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-26 05:44:51,093 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-26 05:44:51,094 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-26 05:44:51,095 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-26 05:44:51,095 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:51,095 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:51,097 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:51,097 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-26 05:44:51,097 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-26 05:44:51,097 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-26 05:44:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-26 05:44:51,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:51,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864542467] [2020-10-26 05:44:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:51,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 05:44:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:51,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864542467] [2020-10-26 05:44:51,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942956988] [2020-10-26 05:44:51,186 INFO L95 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 [2020-10-26 05:44:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-26 05:44:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:51,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:51,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-26 05:44:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990686475] [2020-10-26 05:44:51,262 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-26 05:44:51,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:51,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244994169] [2020-10-26 05:44:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:51,272 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:51,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:51,284 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:51,536 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:51,537 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:51,537 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:51,537 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:51,537 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:51,537 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:51,537 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:51,537 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:51,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2020-10-26 05:44:51,538 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:51,538 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:51,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:51,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:51,545 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:51,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:51,600 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:51,600 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:51,607 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:51,607 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:51,611 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:51,611 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:51,645 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:51,645 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:51,648 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:51,648 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:51,673 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:51,673 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:51,676 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:51,676 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:51,703 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:51,704 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:51,745 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:51,745 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:52,614 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:52,617 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:52,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:52,618 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:52,618 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:52,618 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:52,618 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:52,618 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:52,618 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:52,618 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2020-10-26 05:44:52,619 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:52,619 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:52,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:52,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:52,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:52,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:52,697 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:52,698 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:52,711 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 [2020-10-26 05:44:52,713 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:52,713 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:52,713 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:52,713 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:52,713 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:52,714 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:52,714 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:52,716 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:52,750 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 [2020-10-26 05:44:52,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:52,752 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:52,752 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:52,752 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:52,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:52,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:52,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:52,760 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:52,801 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 [2020-10-26 05:44:52,804 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:52,804 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:52,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:52,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:52,804 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:52,809 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:52,810 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:52,814 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:52,851 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:52,851 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:52,858 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:52,859 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:52,859 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:52,859 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:52,892 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-26 05:44:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:53,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-26 05:44:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 05:44:53,253 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-26 05:44:53,253 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-26 05:44:53,641 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-26 05:44:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-26 05:44:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-26 05:44:53,643 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-26 05:44:53,644 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:53,644 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-26 05:44:53,645 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:53,645 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-26 05:44:53,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:53,647 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-26 05:44:53,656 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-26 05:44:53,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-26 05:44:53,664 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-26 05:44:53,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-26 05:44:53,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-26 05:44:53,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:53,665 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-26 05:44:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-26 05:44:53,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-26 05:44:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 05:44:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-26 05:44:53,686 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-26 05:44:53,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 05:44:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 05:44:53,687 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-26 05:44:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:53,845 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-26 05:44:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 05:44:53,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-26 05:44:53,853 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-26 05:44:53,863 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-26 05:44:53,864 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-26 05:44:53,865 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-26 05:44:53,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-26 05:44:53,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:53,868 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-26 05:44:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-26 05:44:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-26 05:44:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 05:44:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-26 05:44:53,887 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-26 05:44:53,887 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-26 05:44:53,887 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-26 05:44:53,888 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-26 05:44:53,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-26 05:44:53,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:53,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:53,892 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:53,892 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:53,892 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-26 05:44:53,893 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-26 05:44:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-26 05:44:53,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:53,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605077023] [2020-10-26 05:44:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:53,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-26 05:44:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-26 05:44:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 05:44:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 05:44:54,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605077023] [2020-10-26 05:44:54,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397442855] [2020-10-26 05:44:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:54,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 05:44:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 05:44:54,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:54,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-26 05:44:54,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693974359] [2020-10-26 05:44:54,169 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-26 05:44:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:54,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876224051] [2020-10-26 05:44:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:54,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:54,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:54,180 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:54,301 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:54,301 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:54,301 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:54,302 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:54,302 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:54,302 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:54,302 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:54,302 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:54,302 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration4_Loop [2020-10-26 05:44:54,302 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:54,302 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:54,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:54,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:54,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:54,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:54,371 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:54,372 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2020-10-26 05:44:54,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:54,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:54,379 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:54,380 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:54,408 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:54,408 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2020-10-26 05:44:54,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:54,434 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:55,521 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:55,523 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:55,523 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:55,523 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:55,524 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:55,524 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:55,524 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:55,524 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:55,524 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:55,524 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration4_Loop [2020-10-26 05:44:55,524 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:55,524 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:55,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:55,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:55,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:55,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:55,609 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:55,609 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-26 05:44:55,617 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 [2020-10-26 05:44:55,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:55,620 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:55,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:55,620 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:55,620 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:55,621 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:55,621 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:55,624 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 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 [2020-10-26 05:44:55,657 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 [2020-10-26 05:44:55,659 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:55,659 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:55,659 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:55,659 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:55,659 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:55,664 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:55,665 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:55,674 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:55,679 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:55,679 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:55,683 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:55,683 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:55,684 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:55,684 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:55,716 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:55,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:55,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:55,935 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 [2020-10-26 05:44:55,935 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-26 05:44:56,246 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-26 05:44:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 05:44:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-26 05:44:56,249 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-26 05:44:56,249 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:56,249 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:56,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:56,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:56,480 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 [2020-10-26 05:44:56,480 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-26 05:44:56,749 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-26 05:44:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 05:44:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-26 05:44:56,752 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-26 05:44:56,752 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:56,752 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:44:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:56,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:56,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-26 05:44:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-26 05:44:56,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:56,996 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 [2020-10-26 05:44:56,996 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-26 05:44:57,378 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-26 05:44:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-26 05:44:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-26 05:44:57,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-26 05:44:57,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:57,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-26 05:44:57,382 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:57,382 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-26 05:44:57,387 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:57,387 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-26 05:44:57,416 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-26 05:44:57,433 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-26 05:44:57,434 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-26 05:44:57,435 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-26 05:44:57,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-26 05:44:57,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:57,435 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-26 05:44:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-26 05:44:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-26 05:44:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-26 05:44:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-26 05:44:57,496 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-26 05:44:57,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 05:44:57,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-26 05:44:57,497 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-26 05:44:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:57,842 INFO L93 Difference]: Finished difference Result 504 states and 746 transitions. [2020-10-26 05:44:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 05:44:57,845 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 746 transitions. [2020-10-26 05:44:57,857 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:57,876 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 743 transitions. [2020-10-26 05:44:57,877 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-26 05:44:57,881 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-26 05:44:57,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 743 transitions. [2020-10-26 05:44:57,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:57,881 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 743 transitions. [2020-10-26 05:44:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 743 transitions. [2020-10-26 05:44:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 454. [2020-10-26 05:44:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-26 05:44:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 675 transitions. [2020-10-26 05:44:57,926 INFO L714 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-10-26 05:44:57,927 INFO L594 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-10-26 05:44:57,927 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-26 05:44:57,927 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 454 states and 675 transitions. [2020-10-26 05:44:57,931 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:57,932 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:44:57,932 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:44:57,934 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:44:57,934 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:44:57,934 INFO L794 eck$LassoCheckResult]: Stem: 3814#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3861#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3856#L13 call #t~ret7 := fibo(~n - 1);< 3858#fiboENTRY ~n := #in~n; 3859#L8 assume !(~n < 1); 3855#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3852#fiboENTRY ~n := #in~n; 3853#L8 assume !(~n < 1); 3857#L10 assume !(1 == ~n); 3840#L13 call #t~ret7 := fibo(~n - 1);< 3852#fiboENTRY ~n := #in~n; 3854#L8 assume !(~n < 1); 3839#L10 assume 1 == ~n;#res := 1; 3842#fiboFINAL assume true; 3899#fiboEXIT >#35#return; 3895#L13-1 call #t~ret8 := fibo(~n - 2);< 3897#fiboENTRY ~n := #in~n; 3924#L8 assume !(~n < 1); 3914#L10 assume !(1 == ~n); 3915#L13 call #t~ret7 := fibo(~n - 1);< 3954#fiboENTRY ~n := #in~n; 3998#L8 assume !(~n < 1); 3988#L10 assume !(1 == ~n); 3989#L13 call #t~ret7 := fibo(~n - 1);< 4038#fiboENTRY [2020-10-26 05:44:57,934 INFO L796 eck$LassoCheckResult]: Loop: 4038#fiboENTRY ~n := #in~n; 4066#L8 assume !(~n < 1); 4052#L10 assume !(1 == ~n); 4037#L13 call #t~ret7 := fibo(~n - 1);< 4038#fiboENTRY [2020-10-26 05:44:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-26 05:44:57,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:57,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859874328] [2020-10-26 05:44:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:58,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 05:44:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 05:44:58,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859874328] [2020-10-26 05:44:58,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311257094] [2020-10-26 05:44:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:44:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 05:44:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 05:44:58,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:44:58,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-26 05:44:58,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356947578] [2020-10-26 05:44:58,204 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:44:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-26 05:44:58,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:44:58,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773270778] [2020-10-26 05:44:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:44:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:58,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:44:58,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:44:58,216 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:44:58,266 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:58,267 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:58,267 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:58,267 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:58,267 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:44:58,267 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,267 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:58,267 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:58,267 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2020-10-26 05:44:58,267 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:58,268 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:58,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,334 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:58,334 INFO L404 LassoAnalysis]: Checking for nontermination... 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) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:58,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:44:58,341 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:58,342 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:58,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:58,378 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,387 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:58,387 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:58,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:58,422 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 [2020-10-26 05:44:58,426 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:44:58,426 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:44:58,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:44:58,461 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 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) [2020-10-26 05:44:58,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:44:58,492 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 [2020-10-26 05:44:58,557 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:44:58,559 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:44:58,559 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:44:58,559 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:44:58,559 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:44:58,559 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:44:58,560 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,560 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:44:58,560 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:44:58,560 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2020-10-26 05:44:58,560 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:44:58,560 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:44:58,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:44:58,634 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:44:58,634 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,641 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 [2020-10-26 05:44:58,643 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:58,643 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:58,643 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:58,643 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:58,643 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:58,644 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:58,644 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:58,646 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,669 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 [2020-10-26 05:44:58,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:58,671 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:58,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:58,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:58,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:58,672 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:58,672 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:58,674 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 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 [2020-10-26 05:44:58,698 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 [2020-10-26 05:44:58,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:58,701 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:58,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:58,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:58,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:58,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:58,702 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:58,708 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 [2020-10-26 05:44:58,733 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 [2020-10-26 05:44:58,735 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:58,735 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:58,735 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:58,735 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:58,735 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:58,735 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:58,736 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:58,737 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 [2020-10-26 05:44:58,760 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 [2020-10-26 05:44:58,761 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:44:58,761 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:44:58,761 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:44:58,761 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:44:58,762 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:44:58,763 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:44:58,763 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:44:58,765 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:44:58,769 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 05:44:58,770 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:44:58,773 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:44:58,773 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:44:58,774 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:44:58,774 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-26 05:44:58,794 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:44:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 05:44:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:58,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:58,993 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 [2020-10-26 05:44:58,993 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-26 05:44:59,096 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-10-26 05:44:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 05:44:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-26 05:44:59,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-26 05:44:59,098 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:59,098 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 05:44:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:59,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:59,250 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 [2020-10-26 05:44:59,250 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-26 05:44:59,351 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-10-26 05:44:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 05:44:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-26 05:44:59,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-26 05:44:59,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:59,354 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:44:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:44:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-26 05:44:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:44:59,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:44:59,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:44:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:44:59,529 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 [2020-10-26 05:44:59,529 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-26 05:44:59,663 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 615 states and 859 transitions. Complement of second has 14 states. [2020-10-26 05:44:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 05:44:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-26 05:44:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-26 05:44:59,669 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-26 05:44:59,670 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:59,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-26 05:44:59,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:59,675 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-26 05:44:59,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:44:59,677 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 615 states and 859 transitions. [2020-10-26 05:44:59,688 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:59,699 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 615 states to 518 states and 750 transitions. [2020-10-26 05:44:59,699 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 187 [2020-10-26 05:44:59,701 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 196 [2020-10-26 05:44:59,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 518 states and 750 transitions. [2020-10-26 05:44:59,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:59,708 INFO L691 BuchiCegarLoop]: Abstraction has 518 states and 750 transitions. [2020-10-26 05:44:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states and 750 transitions. [2020-10-26 05:44:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 488. [2020-10-26 05:44:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-10-26 05:44:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 714 transitions. [2020-10-26 05:44:59,737 INFO L714 BuchiCegarLoop]: Abstraction has 488 states and 714 transitions. [2020-10-26 05:44:59,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:44:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 05:44:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-26 05:44:59,740 INFO L87 Difference]: Start difference. First operand 488 states and 714 transitions. Second operand 12 states. [2020-10-26 05:44:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:44:59,967 INFO L93 Difference]: Finished difference Result 547 states and 814 transitions. [2020-10-26 05:44:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 05:44:59,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 547 states and 814 transitions. [2020-10-26 05:44:59,976 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:44:59,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 547 states to 541 states and 803 transitions. [2020-10-26 05:44:59,997 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 212 [2020-10-26 05:44:59,997 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 212 [2020-10-26 05:44:59,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 541 states and 803 transitions. [2020-10-26 05:44:59,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:44:59,998 INFO L691 BuchiCegarLoop]: Abstraction has 541 states and 803 transitions. [2020-10-26 05:44:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states and 803 transitions. [2020-10-26 05:45:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 504. [2020-10-26 05:45:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-26 05:45:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 746 transitions. [2020-10-26 05:45:00,018 INFO L714 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-10-26 05:45:00,018 INFO L594 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-10-26 05:45:00,018 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-26 05:45:00,018 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 504 states and 746 transitions. [2020-10-26 05:45:00,022 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:45:00,022 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 05:45:00,022 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 05:45:00,023 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 05:45:00,023 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-26 05:45:00,024 INFO L794 eck$LassoCheckResult]: Stem: 7329#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7321#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 7317#L27 call main_#t~ret9 := fibo(main_~x~0);< 7339#fiboENTRY ~n := #in~n; 7340#L8 assume !(~n < 1); 7368#L10 assume !(1 == ~n); 7366#L13 call #t~ret7 := fibo(~n - 1);< 7371#fiboENTRY ~n := #in~n; 7369#L8 assume !(~n < 1); 7370#L10 assume !(1 == ~n); 7364#L13 call #t~ret7 := fibo(~n - 1);< 7367#fiboENTRY ~n := #in~n; 7395#L8 assume !(~n < 1); 7393#L10 assume !(1 == ~n); 7387#L13 call #t~ret7 := fibo(~n - 1);< 7391#fiboENTRY ~n := #in~n; 7404#L8 assume !(~n < 1); 7403#L10 assume !(1 == ~n); 7389#L13 call #t~ret7 := fibo(~n - 1);< 7391#fiboENTRY ~n := #in~n; 7408#L8 assume !(~n < 1); 7696#L10 assume 1 == ~n;#res := 1; 7695#fiboFINAL assume true; 7693#fiboEXIT >#35#return; 7684#L13-1 call #t~ret8 := fibo(~n - 2);< 7690#fiboENTRY ~n := #in~n; 7708#L8 assume !(~n < 1); 7709#L10 assume !(1 == ~n); 7710#L13 call #t~ret7 := fibo(~n - 1);< 7719#fiboENTRY ~n := #in~n; 7730#L8 assume !(~n < 1); 7729#L10 assume !(1 == ~n); 7352#L13 call #t~ret7 := fibo(~n - 1);< 7350#fiboENTRY ~n := #in~n; 7354#L8 assume !(~n < 1); 7362#L10 assume !(1 == ~n); 7351#L13 [2020-10-26 05:45:00,024 INFO L796 eck$LassoCheckResult]: Loop: 7351#L13 call #t~ret7 := fibo(~n - 1);< 7350#fiboENTRY ~n := #in~n; 7354#L8 assume !(~n < 1); 7362#L10 assume !(1 == ~n); 7351#L13 [2020-10-26 05:45:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-26 05:45:00,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:45:00,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127244445] [2020-10-26 05:45:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:45:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:00,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 05:45:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 05:45:00,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127244445] [2020-10-26 05:45:00,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165110576] [2020-10-26 05:45:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 05:45:00,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 05:45:00,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 05:45:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-26 05:45:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 05:45:00,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 05:45:00,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-26 05:45:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759062294] [2020-10-26 05:45:00,269 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-26 05:45:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-26 05:45:00,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 05:45:00,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782293359] [2020-10-26 05:45:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 05:45:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:45:00,276 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:45:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 05:45:00,278 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 05:45:00,279 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 05:45:00,336 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:45:00,336 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:45:00,337 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:45:00,337 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:45:00,337 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 05:45:00,337 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:00,337 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:45:00,337 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:45:00,337 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2020-10-26 05:45:00,338 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:45:00,338 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:45:00,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:00,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:00,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:00,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:00,431 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:45:00,432 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:00,455 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:45:00,455 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:45:00,458 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:45:00,459 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:45:00,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:45:00,498 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:00,501 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 05:45:00,502 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:45:00,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 05:45:00,539 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 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 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 [2020-10-26 05:45:00,583 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 05:45:00,583 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 05:45:07,464 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 05:45:07,466 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 05:45:07,467 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 05:45:07,467 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 05:45:07,467 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 05:45:07,467 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 05:45:07,467 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:07,467 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 05:45:07,467 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 05:45:07,468 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2020-10-26 05:45:07,468 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 05:45:07,468 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 05:45:07,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:07,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:07,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:07,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 05:45:07,577 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 05:45:07,577 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-26 05:45:07,586 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 [2020-10-26 05:45:07,588 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:45:07,589 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:45:07,589 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:45:07,589 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:45:07,589 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:45:07,590 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:45:07,590 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:07,592 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 05:45:07,637 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 [2020-10-26 05:45:07,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:45:07,639 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:45:07,639 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:45:07,640 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:45:07,640 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:45:07,641 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:45:07,641 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:07,645 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:07,680 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 [2020-10-26 05:45:07,681 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 05:45:07,681 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 05:45:07,681 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 05:45:07,682 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 05:45:07,682 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 05:45:07,683 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 05:45:07,683 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 05:45:07,686 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 05:45:07,688 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-26 05:45:07,688 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 05:45:07,692 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 05:45:07,692 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 05:45:07,693 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 05:45:07,693 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-26 05:45:07,714 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 05:45:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:07,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 05:45:07,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:45:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:45:07,900 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 [2020-10-26 05:45:07,900 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-10-26 05:45:07,992 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 516 states and 759 transitions. Complement of second has 18 states. [2020-10-26 05:45:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-26 05:45:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:45:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-26 05:45:07,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-26 05:45:07,994 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:07,994 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 05:45:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 05:45:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-26 05:45:08,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 05:45:08,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 05:45:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 05:45:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 05:45:08,182 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 [2020-10-26 05:45:08,182 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-10-26 05:45:08,331 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 746 states and 1075 transitions. Complement of second has 22 states. [2020-10-26 05:45:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-26 05:45:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-26 05:45:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-26 05:45:08,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-26 05:45:08,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:08,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-26 05:45:08,336 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:08,337 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-26 05:45:08,337 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 05:45:08,337 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 746 states and 1075 transitions. [2020-10-26 05:45:08,349 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-26 05:45:08,361 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 746 states to 682 states and 1006 transitions. [2020-10-26 05:45:08,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-26 05:45:08,363 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2020-10-26 05:45:08,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 682 states and 1006 transitions. [2020-10-26 05:45:08,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 05:45:08,364 INFO L691 BuchiCegarLoop]: Abstraction has 682 states and 1006 transitions. [2020-10-26 05:45:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states and 1006 transitions. [2020-10-26 05:45:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 665. [2020-10-26 05:45:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-10-26 05:45:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 981 transitions. [2020-10-26 05:45:08,391 INFO L714 BuchiCegarLoop]: Abstraction has 665 states and 981 transitions. [2020-10-26 05:45:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 05:45:08,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 05:45:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 05:45:08,392 INFO L87 Difference]: Start difference. First operand 665 states and 981 transitions. Second operand 13 states. [2020-10-26 05:45:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 05:45:08,622 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2020-10-26 05:45:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 05:45:08,623 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 189 transitions. [2020-10-26 05:45:08,625 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 05:45:08,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 0 states and 0 transitions. [2020-10-26 05:45:08,626 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-26 05:45:08,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-26 05:45:08,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-26 05:45:08,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 05:45:08,626 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 05:45:08,626 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 05:45:08,626 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 05:45:08,626 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-26 05:45:08,627 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-26 05:45:08,627 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 05:45:08,627 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-26 05:45:08,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 05:45:08 BoogieIcfgContainer [2020-10-26 05:45:08,635 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 05:45:08,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 05:45:08,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 05:45:08,637 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 05:45:08,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 05:44:48" (3/4) ... [2020-10-26 05:45:08,642 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 05:45:08,642 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 05:45:08,644 INFO L168 Benchmark]: Toolchain (without parser) took 20622.30 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 33.0 MB in the beginning and 42.1 MB in the end (delta: -9.0 MB). Peak memory consumption was 67.7 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:08,645 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 37.7 MB. Free memory was 17.5 MB in the beginning and 17.4 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 05:45:08,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.33 ms. Allocated memory is still 48.2 MB. Free memory was 32.4 MB in the beginning and 23.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:08,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.06 ms. Allocated memory is still 48.2 MB. Free memory was 23.3 MB in the beginning and 22.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 05:45:08,647 INFO L168 Benchmark]: Boogie Preprocessor took 31.77 ms. Allocated memory is still 48.2 MB. Free memory was 22.0 MB in the beginning and 33.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:08,648 INFO L168 Benchmark]: RCFGBuilder took 292.53 ms. Allocated memory is still 48.2 MB. Free memory was 33.1 MB in the beginning and 22.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:08,649 INFO L168 Benchmark]: BuchiAutomizer took 20008.12 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 22.2 MB in the beginning and 43.1 MB in the end (delta: -20.9 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. [2020-10-26 05:45:08,649 INFO L168 Benchmark]: Witness Printer took 6.03 ms. Allocated memory is still 125.8 MB. Free memory was 43.1 MB in the beginning and 42.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 05:45:08,653 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 37.7 MB. Free memory was 17.5 MB in the beginning and 17.4 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.33 ms. Allocated memory is still 48.2 MB. Free memory was 32.4 MB in the beginning and 23.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.06 ms. Allocated memory is still 48.2 MB. Free memory was 23.3 MB in the beginning and 22.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.77 ms. Allocated memory is still 48.2 MB. Free memory was 22.0 MB in the beginning and 33.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * RCFGBuilder took 292.53 ms. Allocated memory is still 48.2 MB. Free memory was 33.1 MB in the beginning and 22.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 20008.12 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 22.2 MB in the beginning and 43.1 MB in the end (delta: -20.9 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. * Witness Printer took 6.03 ms. Allocated memory is still 125.8 MB. Free memory was 43.1 MB in the beginning and 42.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 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 10 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. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 19.9s and 7 iterations. TraceHistogramMax:8. Analysis of lassos took 13.7s. Construction of modules took 1.2s. Büchi inclusion checks took 4.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 262 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 504 states and ocurred in iteration 5. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 189 SDtfs, 414 SDslu, 261 SDs, 0 SdLazy, 974 SolverSat, 224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf89 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf92 smp82 dnf100 smp100 tf110 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...