./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faad93e560ba524ae1ece04545479d8bfc495d5f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 08:00:29,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:00:29,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:00:29,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:00:29,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:00:29,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:00:29,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:00:29,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:00:29,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:00:29,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:00:29,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:00:29,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:00:29,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:00:29,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:00:29,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:00:29,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:00:29,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:00:29,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:00:29,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:00:29,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:00:29,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:00:29,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:00:29,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:00:29,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:00:29,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:00:29,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:00:29,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:00:29,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:00:29,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:00:29,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:00:29,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:00:29,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:00:29,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:00:29,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:00:29,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:00:29,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:00:29,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:00:29,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:00:29,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:00:29,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:00:29,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:00:29,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:00:29,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:00:29,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:00:29,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:00:29,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:00:29,711 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:00:29,712 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:00:29,712 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:00:29,712 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:00:29,712 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:00:29,712 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:00:29,714 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:00:29,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:00:29,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:00:29,715 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:00:29,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:00:29,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:00:29,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:00:29,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:00:29,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:00:29,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:00:29,718 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:00:29,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:00:29,718 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:00:29,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:00:29,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:00:29,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:00:29,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:00:29,719 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:00:29,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:00:29,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:00:29,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:00:29,720 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:00:29,722 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:00:29,722 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faad93e560ba524ae1ece04545479d8bfc495d5f [2020-10-20 08:00:29,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:00:29,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:00:29,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:00:29,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:00:29,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:00:29,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2020-10-20 08:00:30,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fcaba9b/537c6b0c61b14e07bdb38265713429ed/FLAG3ce0111ea [2020-10-20 08:00:30,513 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:00:30,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2020-10-20 08:00:30,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fcaba9b/537c6b0c61b14e07bdb38265713429ed/FLAG3ce0111ea [2020-10-20 08:00:30,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fcaba9b/537c6b0c61b14e07bdb38265713429ed [2020-10-20 08:00:30,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:00:30,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:00:30,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:30,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:00:30,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:00:30,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:30" (1/1) ... [2020-10-20 08:00:30,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6d03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:30, skipping insertion in model container [2020-10-20 08:00:30,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:30" (1/1) ... [2020-10-20 08:00:30,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:00:30,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:00:31,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:31,273 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:00:31,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:31,304 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:00:31,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31 WrapperNode [2020-10-20 08:00:31,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:31,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:31,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:00:31,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:00:31,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:31,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:00:31,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:00:31,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:00:31,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (1/1) ... [2020-10-20 08:00:31,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:00:31,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:00:31,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:00:31,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:00:31,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (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 [2020-10-20 08:00:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:00:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:00:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:00:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:00:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-20 08:00:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-20 08:00:31,630 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:00:31,630 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:00:31,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:31 BoogieIcfgContainer [2020-10-20 08:00:31,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:00:31,633 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:00:31,633 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:00:31,637 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:00:31,638 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:31,638 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:00:30" (1/3) ... [2020-10-20 08:00:31,639 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b8a1bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:31, skipping insertion in model container [2020-10-20 08:00:31,640 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:31,640 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:31" (2/3) ... [2020-10-20 08:00:31,640 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b8a1bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:31, skipping insertion in model container [2020-10-20 08:00:31,640 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:31,640 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:31" (3/3) ... [2020-10-20 08:00:31,642 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2020-10-20 08:00:31,706 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:00:31,706 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:00:31,706 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:00:31,707 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:00:31,707 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:00:31,707 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:00:31,708 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:00:31,708 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:00:31,727 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:00:31,757 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:31,757 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:31,757 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:31,767 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:31,767 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:31,768 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:00:31,768 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:00:31,771 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:31,771 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:31,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:31,772 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:31,772 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:31,781 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-20 08:00:31,782 INFO L796 eck$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 [2020-10-20 08:00:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-20 08:00:31,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:31,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323770450] [2020-10-20 08:00:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:31,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:31,939 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:31,961 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-20 08:00:31,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:31,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333062789] [2020-10-20 08:00:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:31,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:31,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:31,974 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-20 08:00:31,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:31,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22571019] [2020-10-20 08:00:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:31,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:32,025 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:32,030 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:32,135 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:32,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:32,137 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:32,137 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:32,137 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:32,137 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,138 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:32,138 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:32,138 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2020-10-20 08:00:32,138 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:32,139 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:32,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,274 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:32,274 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) [2020-10-20 08:00:32,282 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:32,282 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 [2020-10-20 08:00:32,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:32,293 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) [2020-10-20 08:00:32,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:32,334 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 [2020-10-20 08:00:32,339 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:32,339 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,366 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:32,366 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:32,369 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:32,369 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:32,397 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:32,404 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:32,404 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,438 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:32,439 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,477 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:32,477 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:32,510 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:32,512 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:32,512 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:32,512 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:32,512 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:32,513 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:32,513 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,513 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:32,513 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:32,513 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2020-10-20 08:00:32,513 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:32,513 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:32,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:32,606 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:32,612 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) [2020-10-20 08:00:32,626 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 [2020-10-20 08:00:32,631 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:32,631 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:32,632 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:32,632 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:32,632 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:32,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:32,637 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,640 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 [2020-10-20 08:00:32,685 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 [2020-10-20 08:00:32,687 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:32,688 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:32,688 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:32,688 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:32,688 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:32,689 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:32,689 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:32,692 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,731 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 [2020-10-20 08:00:32,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:32,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:32,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:32,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:32,734 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:32,735 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:32,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:32,745 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,779 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 [2020-10-20 08:00:32,781 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:32,781 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:32,782 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:32,782 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:32,782 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:32,783 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:32,783 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:32,786 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,825 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 [2020-10-20 08:00:32,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:32,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:32,828 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:32,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:32,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:32,830 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:32,830 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:32,834 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:32,838 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:32,839 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:32,854 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:32,854 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:32,854 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:32,855 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-20 08:00:32,878 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:00:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:33,021 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 [2020-10-20 08:00:33,023 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-20 08:00:33,188 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. [2020-10-20 08:00:33,189 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 [2020-10-20 08:00:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 08:00:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-20 08:00:33,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-20 08:00:33,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:33,197 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-20 08:00:33,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:33,197 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:00:33,198 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:33,199 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-20 08:00:33,204 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:33,213 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-20 08:00:33,214 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-20 08:00:33,215 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-20 08:00:33,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-20 08:00:33,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:33,216 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-20 08:00:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-20 08:00:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-20 08:00:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 08:00:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-20 08:00:33,253 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:00:33,254 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:00:33,254 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:00:33,254 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-20 08:00:33,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:33,255 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:33,255 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:33,256 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:33,256 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:33,257 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:00:33,257 INFO L796 eck$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 [2020-10-20 08:00:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-20 08:00:33,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626420416] [2020-10-20 08:00:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:00:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:33,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626420416] [2020-10-20 08:00:33,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:33,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969241896] [2020-10-20 08:00:33,375 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-20 08:00:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437187003] [2020-10-20 08:00:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:00:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:33,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437187003] [2020-10-20 08:00:33,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:33,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596925693] [2020-10-20 08:00:33,425 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:33,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:00:33,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:00:33,429 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-20 08:00:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:33,514 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-20 08:00:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:00:33,515 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-20 08:00:33,517 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:33,519 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-20 08:00:33,519 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-20 08:00:33,519 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-20 08:00:33,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-20 08:00:33,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:33,520 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:00:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-20 08:00:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 08:00:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 08:00:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-20 08:00:33,525 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:00:33,526 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:00:33,526 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:00:33,526 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-20 08:00:33,527 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:33,528 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:33,528 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:33,529 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:33,529 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:33,530 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:00:33,530 INFO L796 eck$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~ret7;havoc #t~ret8; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:00:33,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-20 08:00:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318346430] [2020-10-20 08:00:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:00:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318346430] [2020-10-20 08:00:33,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265541464] [2020-10-20 08:00:33,629 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 [2020-10-20 08:00:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:00:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:33,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:33,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 08:00:33,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587885305] [2020-10-20 08:00:33,701 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-20 08:00:33,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410338781] [2020-10-20 08:00:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,724 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:33,966 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:33,966 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:33,966 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:33,967 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:33,967 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:33,967 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,967 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:33,967 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:33,967 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2020-10-20 08:00:33,967 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:33,967 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:33,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:34,029 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:34,029 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) [2020-10-20 08:00:34,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:34,034 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,038 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:34,038 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) [2020-10-20 08:00:34,095 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:34,096 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,101 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:34,102 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) [2020-10-20 08:00:34,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:34,152 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,157 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:34,157 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) [2020-10-20 08:00:34,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:34,207 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) [2020-10-20 08:00:34,260 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:34,260 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,193 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:35,195 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:35,195 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:35,195 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:35,195 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:35,195 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:35,196 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,196 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:35,196 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:35,196 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2020-10-20 08:00:35,196 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:35,196 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:35,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,268 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:35,268 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 [2020-10-20 08:00:35,272 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 [2020-10-20 08:00:35,274 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:35,274 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:35,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:35,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:35,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:35,276 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:35,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:35,278 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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,303 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 [2020-10-20 08:00:35,305 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:35,305 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:35,305 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:35,305 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:35,305 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:35,306 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:35,306 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:35,310 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 [2020-10-20 08:00:35,340 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 [2020-10-20 08:00:35,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:35,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:35,344 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:35,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:35,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:35,346 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:35,347 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:35,352 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:35,362 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:35,362 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) [2020-10-20 08:00:35,366 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:35,367 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:35,367 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:35,367 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 [2020-10-20 08:00:35,389 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:00:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 08:00:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:35,656 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 [2020-10-20 08:00:35,656 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-20 08:00:36,004 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. [2020-10-20 08:00:36,005 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 [2020-10-20 08:00:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-20 08:00:36,009 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-20 08:00:36,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:36,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-20 08:00:36,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:36,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-20 08:00:36,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:36,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-20 08:00:36,037 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:00:36,043 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-20 08:00:36,044 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-20 08:00:36,044 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-20 08:00:36,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-20 08:00:36,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:36,045 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-20 08:00:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-20 08:00:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-20 08:00:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:00:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-20 08:00:36,064 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-20 08:00:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:00:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:00:36,065 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-20 08:00:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:36,165 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-20 08:00:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 08:00:36,167 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-20 08:00:36,171 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:00:36,175 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-20 08:00:36,176 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-20 08:00:36,176 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-20 08:00:36,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-20 08:00:36,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:36,177 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-20 08:00:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-20 08:00:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-20 08:00:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:00:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-20 08:00:36,191 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:00:36,191 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:00:36,191 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:00:36,191 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-20 08:00:36,193 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:00:36,194 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:36,194 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:36,195 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:36,195 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:36,195 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(12);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 := 10; 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~ret7;havoc #t~ret8; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:00:36,195 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 [2020-10-20 08:00:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-20 08:00:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:36,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936218599] [2020-10-20 08:00:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:00:36,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936218599] [2020-10-20 08:00:36,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128513263] [2020-10-20 08:00:36,309 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 [2020-10-20 08:00:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:00:36,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:36,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 08:00:36,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533700767] [2020-10-20 08:00:36,395 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-20 08:00:36,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:36,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182718017] [2020-10-20 08:00:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:36,400 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:36,404 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:36,406 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:36,530 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:36,530 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:36,530 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:36,530 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:36,530 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:36,530 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:36,531 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:36,531 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:36,531 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration4_Loop [2020-10-20 08:00:36,531 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:36,531 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:36,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,596 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:36,597 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 [2020-10-20 08:00:36,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:36,601 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:36,603 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:36,603 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 [2020-10-20 08:00:36,626 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:36,626 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 [2020-10-20 08:00:36,651 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:36,652 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:37,768 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:37,770 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:37,770 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:37,770 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:37,771 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:37,771 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:37,771 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:37,771 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:37,771 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:37,771 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration4_Loop [2020-10-20 08:00:37,771 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:37,771 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:37,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,835 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:37,835 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) [2020-10-20 08:00:37,844 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 [2020-10-20 08:00:37,846 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:37,846 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:37,846 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:37,847 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:37,847 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:37,849 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:37,849 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 [2020-10-20 08:00:37,851 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) [2020-10-20 08:00:37,893 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 [2020-10-20 08:00:37,895 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:37,895 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:37,895 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:37,896 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:37,896 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:37,899 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:37,900 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:37,903 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:37,906 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:37,907 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) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:37,917 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:37,917 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:37,918 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:37,918 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:37,948 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:38,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:38,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:38,129 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 [2020-10-20 08:00:38,130 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:00:38,400 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. [2020-10-20 08:00:38,402 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 [2020-10-20 08:00:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:00:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-20 08:00:38,403 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:00:38,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:38,404 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:38,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:38,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:38,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:38,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:38,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:38,573 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 [2020-10-20 08:00:38,573 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:00:38,770 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. [2020-10-20 08:00:38,773 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 [2020-10-20 08:00:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:00:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-20 08:00:38,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:00:38,775 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:38,775 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:38,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:38,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:38,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:38,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:38,932 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 [2020-10-20 08:00:38,932 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:00:39,223 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. [2020-10-20 08:00:39,223 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 [2020-10-20 08:00:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:00:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-20 08:00:39,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:00:39,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:39,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-20 08:00:39,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:39,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-20 08:00:39,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:39,229 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-20 08:00:39,245 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-20 08:00:39,258 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-20 08:00:39,258 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-20 08:00:39,259 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-20 08:00:39,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-20 08:00:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:39,260 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-20 08:00:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-20 08:00:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-20 08:00:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-20 08:00:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-20 08:00:39,313 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-20 08:00:39,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:39,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 08:00:39,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 08:00:39,314 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-20 08:00:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:39,546 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-20 08:00:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:39,547 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-20 08:00:39,556 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:39,567 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-20 08:00:39,567 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-20 08:00:39,568 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-20 08:00:39,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-20 08:00:39,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:39,569 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-20 08:00:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-20 08:00:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-20 08:00:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-20 08:00:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-20 08:00:39,600 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:00:39,600 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:00:39,601 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:00:39,601 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-20 08:00:39,605 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:39,606 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:39,606 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:39,607 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:39,607 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:39,607 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4033#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:00:39,608 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:00:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-20 08:00:39,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:39,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536281818] [2020-10-20 08:00:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536281818] [2020-10-20 08:00:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173974461] [2020-10-20 08:00:39,768 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 [2020-10-20 08:00:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:39,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:39,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 08:00:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479991582] [2020-10-20 08:00:39,835 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-20 08:00:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:39,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327537636] [2020-10-20 08:00:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:39,839 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:39,840 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:39,842 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:39,875 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:39,876 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:39,876 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:39,876 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:39,876 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:39,876 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:39,876 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:39,877 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:39,877 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2020-10-20 08:00:39,877 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:39,877 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:39,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,930 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:39,930 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) [2020-10-20 08:00:39,938 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:39,938 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:39,945 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:39,946 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) [2020-10-20 08:00:40,001 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:40,001 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 [2020-10-20 08:00:40,005 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:40,005 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) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:40,029 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:40,029 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:40,031 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:40,031 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) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:40,056 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:40,056 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:40,085 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:40,085 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:40,152 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:40,153 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:40,153 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:40,154 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:40,154 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:40,154 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:40,154 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:40,154 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:40,154 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:40,154 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2020-10-20 08:00:40,155 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:40,155 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:40,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:40,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:40,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:40,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:40,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:40,209 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:40,209 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 [2020-10-20 08:00:40,216 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 [2020-10-20 08:00:40,217 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:40,217 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:40,217 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:40,218 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:40,218 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:40,222 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:40,222 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:40,225 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 [2020-10-20 08:00:40,253 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 [2020-10-20 08:00:40,254 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:40,255 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:40,255 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:40,255 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:40,255 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:40,256 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:40,256 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:40,257 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 [2020-10-20 08:00:40,280 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 [2020-10-20 08:00:40,282 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:40,282 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:40,282 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:40,282 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:40,282 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:40,283 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:40,283 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:40,284 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 [2020-10-20 08:00:40,309 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 [2020-10-20 08:00:40,311 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:40,311 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:40,311 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:40,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:40,312 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:40,312 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:40,312 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:40,313 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 [2020-10-20 08:00:40,337 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 [2020-10-20 08:00:40,338 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:40,338 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:40,338 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:40,338 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:40,338 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:40,339 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:40,339 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:40,342 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:40,346 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:40,346 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 [2020-10-20 08:00:40,349 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:40,349 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:40,349 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:40,350 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-20 08:00:40,370 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:40,514 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 [2020-10-20 08:00:40,515 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:00:40,591 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:00:40,592 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 [2020-10-20 08:00:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:00:40,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:00:40,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:40,593 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:40,698 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 [2020-10-20 08:00:40,698 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:00:40,768 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:00:40,773 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 [2020-10-20 08:00:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:00:40,775 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:00:40,775 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:40,775 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:40,903 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 [2020-10-20 08:00:40,903 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:00:41,017 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-20 08:00:41,018 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 [2020-10-20 08:00:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-20 08:00:41,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:00:41,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:41,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-20 08:00:41,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:41,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-20 08:00:41,030 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:41,030 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-20 08:00:41,041 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:41,051 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-20 08:00:41,051 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-20 08:00:41,052 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-20 08:00:41,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-20 08:00:41,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:41,055 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-20 08:00:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-20 08:00:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-20 08:00:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-20 08:00:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-20 08:00:41,110 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-20 08:00:41,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:41,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:00:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:00:41,112 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-20 08:00:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:41,298 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-20 08:00:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:41,299 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-20 08:00:41,308 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:41,317 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-20 08:00:41,317 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-20 08:00:41,318 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-20 08:00:41,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-20 08:00:41,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:41,319 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-20 08:00:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-20 08:00:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-20 08:00:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-20 08:00:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-20 08:00:41,339 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:00:41,339 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:00:41,339 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:00:41,339 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-20 08:00:41,344 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:41,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:41,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:41,345 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:41,345 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:41,346 INFO L794 eck$LassoCheckResult]: Stem: 7341#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7332#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7326#L27 call main_#t~ret9 := fibo(main_~x~0);< 7350#fiboENTRY ~n := #in~n; 7351#L8 assume !(~n < 1); 7401#L10 assume !(1 == ~n); 7393#L13 call #t~ret7 := fibo(~n - 1);< 7394#fiboENTRY ~n := #in~n; 7403#L8 assume !(~n < 1); 7402#L10 assume !(1 == ~n); 7386#L13 call #t~ret7 := fibo(~n - 1);< 7398#fiboENTRY ~n := #in~n; 7397#L8 assume !(~n < 1); 7396#L10 assume !(1 == ~n); 7390#L13 call #t~ret7 := fibo(~n - 1);< 7395#fiboENTRY ~n := #in~n; 7539#L8 assume !(~n < 1); 7436#L10 assume !(1 == ~n); 7389#L13 call #t~ret7 := fibo(~n - 1);< 7395#fiboENTRY ~n := #in~n; 7538#L8 assume !(~n < 1); 7537#L10 assume 1 == ~n;#res := 1; 7513#fiboFINAL assume true; 7477#fiboEXIT >#35#return; 7382#L13-1 call #t~ret8 := fibo(~n - 2);< 7461#fiboENTRY ~n := #in~n; 7381#L8 assume !(~n < 1); 7383#L10 assume !(1 == ~n); 7364#L13 call #t~ret7 := fibo(~n - 1);< 7744#fiboENTRY ~n := #in~n; 7767#L8 assume !(~n < 1); 7766#L10 assume !(1 == ~n); 7371#L13 call #t~ret7 := fibo(~n - 1);< 7369#fiboENTRY ~n := #in~n; 7374#L8 assume !(~n < 1); 7384#L10 assume !(1 == ~n); 7372#L13 [2020-10-20 08:00:41,346 INFO L796 eck$LassoCheckResult]: Loop: 7372#L13 call #t~ret7 := fibo(~n - 1);< 7369#fiboENTRY ~n := #in~n; 7374#L8 assume !(~n < 1); 7384#L10 assume !(1 == ~n); 7372#L13 [2020-10-20 08:00:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:41,346 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-20 08:00:41,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314208946] [2020-10-20 08:00:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:00:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:00:41,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314208946] [2020-10-20 08:00:41,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561266176] [2020-10-20 08:00:41,465 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 [2020-10-20 08:00:41,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:00:41,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:41,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 08:00:41,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061385639] [2020-10-20 08:00:41,549 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-20 08:00:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557724198] [2020-10-20 08:00:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:41,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:41,553 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:41,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:41,594 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:41,594 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:41,594 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:41,594 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:41,594 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:41,594 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,594 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:41,594 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:41,594 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2020-10-20 08:00:41,595 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:41,595 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:41,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,658 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:41,658 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 [2020-10-20 08:00:41,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,663 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:41,666 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:41,667 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) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,689 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,690 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:41,692 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:41,693 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) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,716 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,717 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2020-10-20 08:00:41,745 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:41,745 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:48,609 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:48,612 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:48,612 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:48,612 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:48,612 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:48,612 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:48,612 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,612 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:48,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:48,619 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2020-10-20 08:00:48,619 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:48,619 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:48,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,692 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:48,692 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) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,696 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 [2020-10-20 08:00:48,697 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,697 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,697 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,698 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,698 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,698 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,698 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:48,699 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) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,723 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 [2020-10-20 08:00:48,724 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,725 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,725 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,725 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,725 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,725 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,725 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:48,727 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 [2020-10-20 08:00:48,753 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 [2020-10-20 08:00:48,754 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,755 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,755 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,755 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,755 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,756 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,756 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:48,765 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:48,768 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:48,768 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 [2020-10-20 08:00:48,774 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:48,774 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:48,775 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:48,775 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:48,796 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:00:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:48,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:48,934 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 [2020-10-20 08:00:48,934 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:00:49,056 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-20 08:00:49,057 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 [2020-10-20 08:00:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:00:49,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:00:49,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,058 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:00:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:49,181 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 [2020-10-20 08:00:49,181 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:00:49,282 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-20 08:00:49,283 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 [2020-10-20 08:00:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:00:49,284 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:00:49,284 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,284 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-20 08:00:49,285 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,285 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-20 08:00:49,285 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,285 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-20 08:00:49,296 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:49,311 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-20 08:00:49,311 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-20 08:00:49,312 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-20 08:00:49,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-20 08:00:49,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:49,313 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-20 08:00:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-20 08:00:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-20 08:00:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-20 08:00:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-20 08:00:49,364 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-20 08:00:49,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:49,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 08:00:49,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 08:00:49,365 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-20 08:00:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:49,604 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-20 08:00:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 08:00:49,604 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-20 08:00:49,615 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:49,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-20 08:00:49,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-20 08:00:49,628 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-20 08:00:49,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-20 08:00:49,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:49,629 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-20 08:00:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-20 08:00:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-20 08:00:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:00:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:00:49,655 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:49,655 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:49,656 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:00:49,656 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-20 08:00:49,662 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:49,662 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:49,662 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:49,663 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:49,664 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:49,664 INFO L794 eck$LassoCheckResult]: Stem: 10978#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11072#L8 assume !(~n < 1); 11070#L10 assume !(1 == ~n); 11067#L13 call #t~ret7 := fibo(~n - 1);< 11068#fiboENTRY ~n := #in~n; 11102#L8 assume !(~n < 1); 11101#L10 assume !(1 == ~n); 11079#L13 call #t~ret7 := fibo(~n - 1);< 11082#fiboENTRY ~n := #in~n; 11100#L8 assume !(~n < 1); 11084#L10 assume !(1 == ~n); 11074#L13 call #t~ret7 := fibo(~n - 1);< 11080#fiboENTRY ~n := #in~n; 11111#L8 assume !(~n < 1); 11110#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11109#fiboENTRY ~n := #in~n; 11140#L8 assume !(~n < 1); 11131#L10 assume !(1 == ~n); 11097#L13 call #t~ret7 := fibo(~n - 1);< 11130#fiboENTRY ~n := #in~n; 11173#L8 assume !(~n < 1); 11160#L10 assume 1 == ~n;#res := 1; 11157#fiboFINAL assume true; 11155#fiboEXIT >#35#return; 11135#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11151#L8 assume ~n < 1;#res := 0; 11148#fiboFINAL assume true; 11134#fiboEXIT >#37#return; 11133#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11129#fiboFINAL assume true; 11108#fiboEXIT >#35#return; 11092#L13-1 call #t~ret8 := fibo(~n - 2);< 11099#fiboENTRY ~n := #in~n; 11158#L8 assume !(~n < 1); 11121#L10 assume !(1 == ~n); 11123#L13 call #t~ret7 := fibo(~n - 1);< 11147#fiboENTRY ~n := #in~n; 11329#L8 assume !(~n < 1); 11324#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11308#fiboENTRY ~n := #in~n; 11349#L8 assume !(~n < 1); 11348#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:00:49,664 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11308#fiboENTRY ~n := #in~n; 11349#L8 assume !(~n < 1); 11348#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:00:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-20 08:00:49,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:49,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178216519] [2020-10-20 08:00:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:00:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:00:49,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178216519] [2020-10-20 08:00:49,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763149643] [2020-10-20 08:00:49,805 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:49,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:49,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:00:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:00:49,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:49,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 08:00:49,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524473520] [2020-10-20 08:00:49,895 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-20 08:00:49,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:49,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463019307] [2020-10-20 08:00:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:49,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:49,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:49,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:49,942 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:49,943 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:49,943 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:49,943 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:49,943 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:49,943 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,943 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:49,943 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:49,943 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2020-10-20 08:00:49,943 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:49,943 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:49,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,008 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:50,008 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:50,011 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:50,012 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:50,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:50,052 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,438 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:51,440 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:51,440 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:51,440 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:51,440 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:51,440 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:51,440 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,441 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:51,441 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:51,441 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2020-10-20 08:00:51,441 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:51,441 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:51,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,498 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:51,499 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,511 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 [2020-10-20 08:00:51,513 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,513 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,513 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,513 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,513 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,514 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,514 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,516 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,542 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,543 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,543 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,543 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,544 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,544 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:51,545 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,569 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 [2020-10-20 08:00:51,570 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,570 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,571 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,571 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,571 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,571 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,573 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,601 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 [2020-10-20 08:00:51,603 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,603 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,603 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,603 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,603 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,604 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,604 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:51,607 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:51,609 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:51,609 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,613 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:51,613 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:51,613 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:51,613 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:51,633 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:51,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:51,771 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 [2020-10-20 08:00:51,771 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:00:51,884 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-20 08:00:51,885 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 [2020-10-20 08:00:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:00:51,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:00:51,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:51,886 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:51,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:52,010 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 [2020-10-20 08:00:52,010 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:00:52,122 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-20 08:00:52,123 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 [2020-10-20 08:00:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:00:52,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:00:52,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,124 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:00:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:52,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:52,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:52,263 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:52,263 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:00:52,351 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-20 08:00:52,351 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 [2020-10-20 08:00:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:00:52,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:00:52,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-20 08:00:52,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-20 08:00:52,355 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,355 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-20 08:00:52,368 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:52,377 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-20 08:00:52,377 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-20 08:00:52,378 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-20 08:00:52,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-20 08:00:52,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:52,379 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-20 08:00:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-20 08:00:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:00:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:00:52,402 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:00:52,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:00:52,403 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-20 08:00:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:52,718 INFO L93 Difference]: Finished difference Result 777 states and 1127 transitions. [2020-10-20 08:00:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 08:00:52,719 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1127 transitions. [2020-10-20 08:00:52,727 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:52,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1127 transitions. [2020-10-20 08:00:52,738 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-20 08:00:52,738 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-20 08:00:52,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1127 transitions. [2020-10-20 08:00:52,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:52,739 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1127 transitions. [2020-10-20 08:00:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1127 transitions. [2020-10-20 08:00:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2020-10-20 08:00:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-20 08:00:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-20 08:00:52,762 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:52,762 INFO L594 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:52,762 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:00:52,762 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 736 states and 1081 transitions. [2020-10-20 08:00:52,767 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:52,768 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:52,768 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:52,769 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:52,769 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:52,770 INFO L794 eck$LassoCheckResult]: Stem: 16562#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16551#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 16552#L27 call main_#t~ret9 := fibo(main_~x~0);< 16575#fiboENTRY ~n := #in~n; 16641#L8 assume !(~n < 1); 16640#L10 assume !(1 == ~n); 16636#L13 call #t~ret7 := fibo(~n - 1);< 16639#fiboENTRY ~n := #in~n; 16638#L8 assume !(~n < 1); 16637#L10 assume !(1 == ~n); 16632#L13 call #t~ret7 := fibo(~n - 1);< 16635#fiboENTRY ~n := #in~n; 16634#L8 assume !(~n < 1); 16633#L10 assume !(1 == ~n); 16625#L13 call #t~ret7 := fibo(~n - 1);< 16631#fiboENTRY ~n := #in~n; 16629#L8 assume !(~n < 1); 16627#L10 assume !(1 == ~n); 16613#L13 call #t~ret7 := fibo(~n - 1);< 16618#fiboENTRY ~n := #in~n; 16623#L8 assume !(~n < 1); 16621#L10 assume !(1 == ~n); 16612#L13 call #t~ret7 := fibo(~n - 1);< 16618#fiboENTRY ~n := #in~n; 16624#L8 assume !(~n < 1); 16622#L10 assume 1 == ~n;#res := 1; 16619#fiboFINAL assume true; 16611#fiboEXIT >#35#return; 16604#L13-1 call #t~ret8 := fibo(~n - 2);< 16608#fiboENTRY ~n := #in~n; 16607#L8 assume !(~n < 1); 16603#L10 assume !(1 == ~n); 16606#L13 call #t~ret7 := fibo(~n - 1);< 16615#fiboENTRY ~n := #in~n; 16630#L8 assume !(~n < 1); 17177#L10 assume !(1 == ~n); 17171#L13 call #t~ret7 := fibo(~n - 1);< 17184#fiboENTRY ~n := #in~n; 17244#L8 assume !(~n < 1); 17239#L10 assume 1 == ~n;#res := 1; 17238#fiboFINAL assume true; 17217#fiboEXIT >#35#return; 16652#L13-1 call #t~ret8 := fibo(~n - 2);< 16653#fiboENTRY ~n := #in~n; 17191#L8 assume ~n < 1;#res := 0; 17218#fiboFINAL assume true; 17201#fiboEXIT >#37#return; 16651#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 17022#fiboFINAL assume true; 16765#fiboEXIT >#35#return; 16730#L13-1 call #t~ret8 := fibo(~n - 2);< 16764#fiboENTRY ~n := #in~n; 16953#L8 assume !(~n < 1); 16937#L10 assume !(1 == ~n); 16748#L13 call #t~ret7 := fibo(~n - 1);< 16752#fiboENTRY ~n := #in~n; 16857#L8 assume !(~n < 1); 16927#L10 assume !(1 == ~n); 16900#L13 call #t~ret7 := fibo(~n - 1);< 16902#fiboENTRY ~n := #in~n; 16923#L8 assume !(~n < 1); 16922#L10 assume !(1 == ~n); 16899#L13 [2020-10-20 08:00:52,770 INFO L796 eck$LassoCheckResult]: Loop: 16899#L13 call #t~ret7 := fibo(~n - 1);< 16902#fiboENTRY ~n := #in~n; 16923#L8 assume !(~n < 1); 16922#L10 assume !(1 == ~n); 16899#L13 [2020-10-20 08:00:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:52,770 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-20 08:00:52,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:52,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148948279] [2020-10-20 08:00:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:00:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-20 08:00:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-20 08:00:52,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148948279] [2020-10-20 08:00:52,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973890346] [2020-10-20 08:00:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:52,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 08:00:52,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:52,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:52,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-20 08:00:53,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:53,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-20 08:00:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739010745] [2020-10-20 08:00:53,120 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-20 08:00:53,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:53,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56527762] [2020-10-20 08:00:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:53,124 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:53,125 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:53,126 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:53,171 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:53,171 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:53,171 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:53,171 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:53,171 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:53,171 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:53,172 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:53,172 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:53,172 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2020-10-20 08:00:53,172 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:53,172 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:53,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:53,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:53,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:53,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:53,259 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:53,259 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:53,266 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:53,266 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:53,269 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:53,269 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:53,292 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:53,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:53,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:53,295 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:53,318 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:53,318 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:53,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:53,347 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:54,758 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:54,760 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:54,760 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:54,760 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:54,760 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:54,761 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:54,761 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:54,761 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:54,761 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:54,761 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2020-10-20 08:00:54,761 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:54,761 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:54,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,832 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:54,832 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:54,835 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 [2020-10-20 08:00:54,836 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:54,836 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:54,836 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:54,836 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:54,836 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:54,837 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:54,837 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:54,838 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:54,861 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 [2020-10-20 08:00:54,862 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:54,862 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:54,862 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:54,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:54,863 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:54,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:54,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:54,864 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:54,886 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 [2020-10-20 08:00:54,887 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:54,887 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:54,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:54,888 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:54,888 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:54,889 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:54,889 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:54,891 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:54,893 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:54,893 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:54,895 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:54,896 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:54,896 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:54,896 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:54,916 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:55,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:55,071 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 [2020-10-20 08:00:55,071 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-20 08:00:55,160 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 755 states and 1101 transitions. Complement of second has 18 states. [2020-10-20 08:00:55,160 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 [2020-10-20 08:00:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:00:55,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:00:55,161 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:55,162 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:55,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:55,327 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 [2020-10-20 08:00:55,327 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-20 08:00:55,454 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 940 states and 1320 transitions. Complement of second has 22 states. [2020-10-20 08:00:55,455 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 [2020-10-20 08:00:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:00:55,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:00:55,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:55,457 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:55,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:55,656 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:55,656 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-20 08:00:55,728 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 983 states and 1401 transitions. Complement of second has 27 states. [2020-10-20 08:00:55,729 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 [2020-10-20 08:00:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:00:55,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:00:55,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:55,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-20 08:00:55,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:55,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-20 08:00:55,732 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:55,732 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 983 states and 1401 transitions. [2020-10-20 08:00:55,742 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:55,752 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 983 states to 736 states and 1081 transitions. [2020-10-20 08:00:55,752 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 231 [2020-10-20 08:00:55,753 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 267 [2020-10-20 08:00:55,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 736 states and 1081 transitions. [2020-10-20 08:00:55,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:55,757 INFO L691 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states and 1081 transitions. [2020-10-20 08:00:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-10-20 08:00:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-20 08:00:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-20 08:00:55,783 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:55,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:55,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 08:00:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-20 08:00:55,784 INFO L87 Difference]: Start difference. First operand 736 states and 1081 transitions. Second operand 23 states. [2020-10-20 08:00:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:56,352 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2020-10-20 08:00:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 08:00:56,353 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 590 transitions. [2020-10-20 08:00:56,359 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:00:56,363 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 507 transitions. [2020-10-20 08:00:56,364 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-10-20 08:00:56,364 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-10-20 08:00:56,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 507 transitions. [2020-10-20 08:00:56,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:56,364 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 507 transitions. [2020-10-20 08:00:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 507 transitions. [2020-10-20 08:00:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-10-20 08:00:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-20 08:00:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-20 08:00:56,374 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-20 08:00:56,374 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-20 08:00:56,375 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:00:56,375 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 425 transitions. [2020-10-20 08:00:56,377 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:00:56,377 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:56,378 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:56,379 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:56,379 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:56,379 INFO L794 eck$LassoCheckResult]: Stem: 22122#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22115#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 22116#L27 call main_#t~ret9 := fibo(main_~x~0);< 22135#fiboENTRY ~n := #in~n; 22223#L8 assume !(~n < 1); 22221#L10 assume !(1 == ~n); 22217#L13 call #t~ret7 := fibo(~n - 1);< 22218#fiboENTRY ~n := #in~n; 22257#L8 assume !(~n < 1); 22253#L10 assume !(1 == ~n); 22227#L13 call #t~ret7 := fibo(~n - 1);< 22230#fiboENTRY ~n := #in~n; 22246#L8 assume !(~n < 1); 22245#L10 assume !(1 == ~n); 22225#L13 call #t~ret7 := fibo(~n - 1);< 22228#fiboENTRY ~n := #in~n; 22251#L8 assume !(~n < 1); 22250#L10 assume !(1 == ~n); 22248#L13 call #t~ret7 := fibo(~n - 1);< 22249#fiboENTRY ~n := #in~n; 22287#L8 assume !(~n < 1); 22284#L10 assume !(1 == ~n); 22110#L13 call #t~ret7 := fibo(~n - 1);< 22255#fiboENTRY ~n := #in~n; 22276#L8 assume !(~n < 1); 22267#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22255#fiboENTRY ~n := #in~n; 22276#L8 assume !(~n < 1); 22267#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22255#fiboENTRY ~n := #in~n; 22276#L8 assume !(~n < 1); 22267#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22262#fiboENTRY ~n := #in~n; 22416#L8 assume !(~n < 1); 22415#L10 assume 1 == ~n;#res := 1; 22414#fiboFINAL assume true; 22413#fiboEXIT >#35#return; 22109#L13-1 call #t~ret8 := fibo(~n - 2);< 22112#fiboENTRY ~n := #in~n; 22411#L8 assume ~n < 1;#res := 0; 22409#fiboFINAL assume true; 22407#fiboEXIT >#37#return; 22399#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22397#fiboFINAL assume true; 22278#fiboEXIT >#35#return; 22271#L13-1 call #t~ret8 := fibo(~n - 2);< 22274#fiboENTRY ~n := #in~n; 22319#L8 assume !(~n < 1); 22295#L10 assume 1 == ~n;#res := 1; 22269#fiboFINAL assume true; 22270#fiboEXIT >#37#return; 22266#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22261#fiboFINAL assume true; 22260#fiboEXIT >#35#return; 22235#L13-1 call #t~ret8 := fibo(~n - 2);< 22242#fiboENTRY ~n := #in~n; 22291#L8 assume !(~n < 1); 22268#L10 assume !(1 == ~n); 22129#L13 call #t~ret7 := fibo(~n - 1);< 22204#fiboENTRY ~n := #in~n; 22198#L8 assume !(~n < 1); 22199#L10 assume !(1 == ~n); 22159#L13 call #t~ret7 := fibo(~n - 1);< 22162#fiboENTRY ~n := #in~n; 22183#L8 assume !(~n < 1); 22181#L10 assume !(1 == ~n); 22158#L13 [2020-10-20 08:00:56,379 INFO L796 eck$LassoCheckResult]: Loop: 22158#L13 call #t~ret7 := fibo(~n - 1);< 22162#fiboENTRY ~n := #in~n; 22183#L8 assume !(~n < 1); 22181#L10 assume !(1 == ~n); 22158#L13 [2020-10-20 08:00:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash 817988141, now seen corresponding path program 4 times [2020-10-20 08:00:56,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:56,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462734294] [2020-10-20 08:00:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-20 08:00:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-20 08:00:56,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462734294] [2020-10-20 08:00:56,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004843284] [2020-10-20 08:00:56,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:56,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 08:00:56,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-20 08:00:56,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:56,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 08:00:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439783728] [2020-10-20 08:00:56,685 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-20 08:00:56,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:56,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092841956] [2020-10-20 08:00:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:56,688 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:56,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:56,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:56,734 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:56,735 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:56,735 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:56,735 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:56,735 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:56,735 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,735 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:56,735 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:56,735 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2020-10-20 08:00:56,736 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:56,736 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:56,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,743 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,818 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:56,818 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:56,823 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:56,825 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:56,825 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,847 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:56,847 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:56,849 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:56,850 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,872 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:56,872 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:56,874 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:56,874 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:56,896 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:56,922 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,878 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:03,880 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:03,880 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:03,880 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:03,881 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:03,881 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:03,881 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,881 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:03,881 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:03,881 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2020-10-20 08:01:03,881 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:03,881 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:03,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,954 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,955 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,957 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 [2020-10-20 08:01:03,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,959 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,959 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,959 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,959 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,960 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,961 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,962 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,984 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 [2020-10-20 08:01:03,985 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,986 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,986 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,986 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,986 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,986 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,986 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,987 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,010 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 [2020-10-20 08:01:04,011 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,011 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,011 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,011 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,011 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,012 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,012 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,015 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:04,016 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:04,017 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,019 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:04,019 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:04,019 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:04,019 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:04,039 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,212 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:04,213 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-20 08:01:04,278 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 337 states and 445 transitions. Complement of second has 18 states. [2020-10-20 08:01:04,279 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 [2020-10-20 08:01:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:04,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-20 08:01:04,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,280 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,480 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 [2020-10-20 08:01:04,480 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-20 08:01:04,562 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 343 states and 451 transitions. Complement of second has 17 states. [2020-10-20 08:01:04,563 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 [2020-10-20 08:01:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:04,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-20 08:01:04,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,564 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,740 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:04,741 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-20 08:01:04,834 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 424 states and 555 transitions. Complement of second has 27 states. [2020-10-20 08:01:04,835 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 [2020-10-20 08:01:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:04,836 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-20 08:01:04,836 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,836 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:04,837 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,837 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:04,837 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,838 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 555 transitions. [2020-10-20 08:01:04,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:04,847 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 435 transitions. [2020-10-20 08:01:04,848 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-10-20 08:01:04,848 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-20 08:01:04,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 435 transitions. [2020-10-20 08:01:04,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:04,849 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 435 transitions. [2020-10-20 08:01:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 435 transitions. [2020-10-20 08:01:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-10-20 08:01:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-20 08:01:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-20 08:01:04,859 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-20 08:01:04,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 08:01:04,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-20 08:01:04,860 INFO L87 Difference]: Start difference. First operand 318 states and 425 transitions. Second operand 20 states. [2020-10-20 08:01:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:05,335 INFO L93 Difference]: Finished difference Result 462 states and 631 transitions. [2020-10-20 08:01:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 08:01:05,335 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 631 transitions. [2020-10-20 08:01:05,341 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:05,348 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 451 states and 614 transitions. [2020-10-20 08:01:05,348 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 204 [2020-10-20 08:01:05,348 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 204 [2020-10-20 08:01:05,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 451 states and 614 transitions. [2020-10-20 08:01:05,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:05,349 INFO L691 BuchiCegarLoop]: Abstraction has 451 states and 614 transitions. [2020-10-20 08:01:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states and 614 transitions. [2020-10-20 08:01:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 384. [2020-10-20 08:01:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-20 08:01:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-20 08:01:05,361 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-20 08:01:05,361 INFO L594 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-20 08:01:05,361 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:05,361 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 384 states and 515 transitions. [2020-10-20 08:01:05,364 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:05,364 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:05,364 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:05,365 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:05,365 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:05,365 INFO L794 eck$LassoCheckResult]: Stem: 25389#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25375#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 25376#L27 call main_#t~ret9 := fibo(main_~x~0);< 25398#fiboENTRY ~n := #in~n; 25579#L8 assume !(~n < 1); 25503#L10 assume !(1 == ~n); 25490#L13 call #t~ret7 := fibo(~n - 1);< 25501#fiboENTRY ~n := #in~n; 25499#L8 assume !(~n < 1); 25497#L10 assume !(1 == ~n); 25493#L13 call #t~ret7 := fibo(~n - 1);< 25494#fiboENTRY ~n := #in~n; 25544#L8 assume !(~n < 1); 25528#L10 assume !(1 == ~n); 25517#L13 call #t~ret7 := fibo(~n - 1);< 25523#fiboENTRY ~n := #in~n; 25527#L8 assume !(~n < 1); 25522#L10 assume !(1 == ~n); 25514#L13 call #t~ret7 := fibo(~n - 1);< 25521#fiboENTRY ~n := #in~n; 25552#L8 assume !(~n < 1); 25550#L10 assume !(1 == ~n); 25530#L13 call #t~ret7 := fibo(~n - 1);< 25546#fiboENTRY ~n := #in~n; 25742#L8 assume !(~n < 1); 25740#L10 assume !(1 == ~n); 25385#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25624#L8 assume !(~n < 1); 25614#L10 assume !(1 == ~n); 25384#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25624#L8 assume !(~n < 1); 25614#L10 assume !(1 == ~n); 25384#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25624#L8 assume !(~n < 1); 25614#L10 assume !(1 == ~n); 25384#L13 call #t~ret7 := fibo(~n - 1);< 25611#fiboENTRY ~n := #in~n; 25717#L8 assume !(~n < 1); 25426#L10 assume 1 == ~n;#res := 1; 25427#fiboFINAL assume true; 25756#fiboEXIT >#35#return; 25383#L13-1 call #t~ret8 := fibo(~n - 2);< 25386#fiboENTRY ~n := #in~n; 25752#L8 assume ~n < 1;#res := 0; 25750#fiboFINAL assume true; 25748#fiboEXIT >#37#return; 25747#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 25746#fiboFINAL assume true; 25745#fiboEXIT >#35#return; 25637#L13-1 call #t~ret8 := fibo(~n - 2);< 25639#fiboENTRY ~n := #in~n; 25754#L8 assume !(~n < 1); 25654#L10 assume 1 == ~n;#res := 1; 25649#fiboFINAL assume true; 25636#fiboEXIT >#37#return; 25634#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 25631#fiboFINAL assume true; 25608#fiboEXIT >#35#return; 25534#L13-1 call #t~ret8 := fibo(~n - 2);< 25541#fiboENTRY ~n := #in~n; 25650#L8 assume !(~n < 1); 25648#L10 assume !(1 == ~n); 25410#L13 call #t~ret7 := fibo(~n - 1);< 25647#fiboENTRY ~n := #in~n; 25689#L8 assume !(~n < 1); 25428#L10 assume !(1 == ~n); 25429#L13 call #t~ret7 := fibo(~n - 1);< 25451#fiboENTRY ~n := #in~n; 25664#L8 assume !(~n < 1); 25662#L10 assume !(1 == ~n); 25454#L13 [2020-10-20 08:01:05,366 INFO L796 eck$LassoCheckResult]: Loop: 25454#L13 call #t~ret7 := fibo(~n - 1);< 25451#fiboENTRY ~n := #in~n; 25664#L8 assume !(~n < 1); 25662#L10 assume !(1 == ~n); 25454#L13 [2020-10-20 08:01:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1637456312, now seen corresponding path program 5 times [2020-10-20 08:01:05,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105872597] [2020-10-20 08:01:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-20 08:01:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 08:01:05,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105872597] [2020-10-20 08:01:05,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978180134] [2020-10-20 08:01:05,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:05,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-20 08:01:05,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-20 08:01:05,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:05,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2020-10-20 08:01:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607608431] [2020-10-20 08:01:05,909 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 7 times [2020-10-20 08:01:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613296524] [2020-10-20 08:01:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,914 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:05,950 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:05,951 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:05,951 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:05,951 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:05,951 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:05,951 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,951 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:05,952 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:05,952 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2020-10-20 08:01:05,952 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:05,952 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:05,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,017 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:06,017 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,020 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:06,020 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:06,023 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:06,024 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,046 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:06,046 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:06,073 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:06,073 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,927 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:12,929 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:12,929 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:12,929 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:12,929 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:12,929 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:12,929 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,929 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:12,929 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:12,929 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2020-10-20 08:01:12,929 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:12,929 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:12,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,998 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:12,998 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:13,008 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 [2020-10-20 08:01:13,009 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:13,009 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:13,009 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:13,009 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:13,009 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:13,010 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:13,010 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:13,011 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:13,034 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 [2020-10-20 08:01:13,035 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:13,035 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:13,035 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:13,035 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:13,035 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:13,036 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:13,036 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:13,037 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:13,059 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 [2020-10-20 08:01:13,060 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:13,060 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:13,060 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:13,061 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:13,061 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:13,061 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:13,061 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:13,064 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:13,066 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:13,067 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:13,071 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:13,072 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:13,072 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:13,072 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:13,092 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:13,247 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 [2020-10-20 08:01:13,247 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-20 08:01:13,326 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 406 states and 538 transitions. Complement of second has 18 states. [2020-10-20 08:01:13,327 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 [2020-10-20 08:01:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:13,328 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:13,328 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,328 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:13,503 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 [2020-10-20 08:01:13,503 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-20 08:01:13,597 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 412 states and 544 transitions. Complement of second has 17 states. [2020-10-20 08:01:13,598 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 [2020-10-20 08:01:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:13,598 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:13,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,599 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:13,829 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:13,829 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-20 08:01:13,925 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 507 states and 666 transitions. Complement of second has 27 states. [2020-10-20 08:01:13,926 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 [2020-10-20 08:01:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:13,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:13,928 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,928 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2020-10-20 08:01:13,928 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,928 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2020-10-20 08:01:13,929 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,929 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 666 transitions. [2020-10-20 08:01:13,937 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:13,944 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 388 states and 520 transitions. [2020-10-20 08:01:13,944 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2020-10-20 08:01:13,944 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2020-10-20 08:01:13,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 388 states and 520 transitions. [2020-10-20 08:01:13,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:13,945 INFO L691 BuchiCegarLoop]: Abstraction has 388 states and 520 transitions. [2020-10-20 08:01:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states and 520 transitions. [2020-10-20 08:01:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2020-10-20 08:01:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-20 08:01:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-20 08:01:13,960 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-20 08:01:13,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 08:01:13,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-20 08:01:13,961 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand 24 states. [2020-10-20 08:01:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:14,602 INFO L93 Difference]: Finished difference Result 542 states and 774 transitions. [2020-10-20 08:01:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 08:01:14,603 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 542 states and 774 transitions. [2020-10-20 08:01:14,611 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:14,611 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 542 states to 0 states and 0 transitions. [2020-10-20 08:01:14,612 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:14,612 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:14,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:14,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:14,612 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:14,613 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:14,613 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:14,613 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-20 08:01:14,613 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:14,613 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:14,613 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:14,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:14 BoogieIcfgContainer [2020-10-20 08:01:14,621 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:14,623 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:14,623 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:14,624 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:14,624 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:31" (3/4) ... [2020-10-20 08:01:14,629 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:14,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:14,632 INFO L168 Benchmark]: Toolchain (without parser) took 43715.74 ms. Allocated memory was 34.6 MB in the beginning and 138.4 MB in the end (delta: 103.8 MB). Free memory was 11.6 MB in the beginning and 97.9 MB in the end (delta: -86.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,635 INFO L168 Benchmark]: CDTParser took 1.12 ms. Allocated memory is still 33.0 MB. Free memory was 17.7 MB in the beginning and 17.6 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,636 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.35 ms. Allocated memory was 34.6 MB in the beginning and 43.5 MB in the end (delta: 8.9 MB). Free memory was 10.7 MB in the beginning and 23.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.93 ms. Allocated memory is still 43.5 MB. Free memory was 23.6 MB in the beginning and 22.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,641 INFO L168 Benchmark]: Boogie Preprocessor took 19.85 ms. Allocated memory is still 43.5 MB. Free memory was 22.1 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,641 INFO L168 Benchmark]: RCFGBuilder took 268.72 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 20.8 MB in the beginning and 19.9 MB in the end (delta: 910.3 kB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,642 INFO L168 Benchmark]: BuchiAutomizer took 42987.75 ms. Allocated memory was 45.1 MB in the beginning and 138.4 MB in the end (delta: 93.3 MB). Free memory was 19.7 MB in the beginning and 97.9 MB in the end (delta: -78.2 MB). Peak memory consumption was 15.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:14,642 INFO L168 Benchmark]: Witness Printer took 6.09 ms. Allocated memory is still 138.4 MB. Free memory is still 97.9 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:01:14,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12 ms. Allocated memory is still 33.0 MB. Free memory was 17.7 MB in the beginning and 17.6 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 383.35 ms. Allocated memory was 34.6 MB in the beginning and 43.5 MB in the end (delta: 8.9 MB). Free memory was 10.7 MB in the beginning and 23.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.93 ms. Allocated memory is still 43.5 MB. Free memory was 23.6 MB in the beginning and 22.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.85 ms. Allocated memory is still 43.5 MB. Free memory was 22.1 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 268.72 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 20.8 MB in the beginning and 19.9 MB in the end (delta: 910.3 kB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 42987.75 ms. Allocated memory was 45.1 MB in the beginning and 138.4 MB in the end (delta: 93.3 MB). Free memory was 19.7 MB in the beginning and 97.9 MB in the end (delta: -78.2 MB). Peak memory consumption was 15.1 MB. Max. memory is 14.3 GB. * Witness Printer took 6.09 ms. Allocated memory is still 138.4 MB. Free memory is still 97.9 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 18 terminating modules (9 trivial, 3 deterministic, 6 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. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 42.9s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 32.6s. Construction of modules took 2.3s. Büchi inclusion checks took 7.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 17. Automata minimization 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 453 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 736 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 407 SDtfs, 1132 SDslu, 735 SDs, 0 SdLazy, 2447 SolverSat, 770 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT8 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 9 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 26.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...