./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive/Fibonacci02.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 675300a4b632e073b31d1e86ab5660e0c5ab887b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 20:06:42,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 20:06:42,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 20:06:42,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 20:06:42,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 20:06:42,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 20:06:42,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 20:06:42,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 20:06:42,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 20:06:42,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 20:06:42,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 20:06:42,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 20:06:42,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 20:06:42,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 20:06:42,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 20:06:42,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 20:06:42,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 20:06:42,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 20:06:42,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 20:06:42,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 20:06:42,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 20:06:42,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 20:06:42,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 20:06:42,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 20:06:42,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 20:06:42,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 20:06:42,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 20:06:42,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 20:06:42,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 20:06:42,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 20:06:42,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 20:06:42,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 20:06:42,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 20:06:42,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 20:06:42,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 20:06:42,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 20:06:42,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 20:06:42,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 20:06:42,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 20:06:42,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 20:06:42,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 20:06:42,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 20:06:42,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 20:06:42,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 20:06:42,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 20:06:42,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 20:06:42,658 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 20:06:42,659 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 20:06:42,659 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 20:06:42,659 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 20:06:42,660 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 20:06:42,660 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 20:06:42,660 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 20:06:42,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 20:06:42,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 20:06:42,661 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 20:06:42,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 20:06:42,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 20:06:42,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 20:06:42,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 20:06:42,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 20:06:42,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 20:06:42,663 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 20:06:42,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 20:06:42,664 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 20:06:42,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 20:06:42,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 20:06:42,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 20:06:42,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 20:06:42,665 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 20:06:42,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 20:06:42,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 20:06:42,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 20:06:42,666 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 20:06:42,668 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 20:06:42,668 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 -> 675300a4b632e073b31d1e86ab5660e0c5ab887b [2020-10-19 20:06:42,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 20:06:43,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 20:06:43,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 20:06:43,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 20:06:43,015 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 20:06:43,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci02.c [2020-10-19 20:06:43,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80fe618d2/31c8a206ef6942d4af9aae64e152c0e3/FLAGbc69c692c [2020-10-19 20:06:43,466 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 20:06:43,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c [2020-10-19 20:06:43,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80fe618d2/31c8a206ef6942d4af9aae64e152c0e3/FLAGbc69c692c [2020-10-19 20:06:43,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80fe618d2/31c8a206ef6942d4af9aae64e152c0e3 [2020-10-19 20:06:43,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 20:06:43,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 20:06:43,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 20:06:43,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 20:06:43,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 20:06:43,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:06:43" (1/1) ... [2020-10-19 20:06:43,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790d49d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:43, skipping insertion in model container [2020-10-19 20:06:43,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:06:43" (1/1) ... [2020-10-19 20:06:43,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 20:06:43,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 20:06:44,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:06:44,117 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 20:06:44,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:06:44,147 INFO L208 MainTranslator]: Completed translation [2020-10-19 20:06:44,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44 WrapperNode [2020-10-19 20:06:44,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 20:06:44,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 20:06:44,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 20:06:44,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 20:06:44,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 20:06:44,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 20:06:44,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 20:06:44,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 20:06:44,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... [2020-10-19 20:06:44,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 20:06:44,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 20:06:44,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 20:06:44,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 20:06:44,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-10-19 20:06:44,384 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-10-19 20:06:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 20:06:44,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 20:06:44,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 20:06:44,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 20:06:44,705 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 20:06:44,706 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 20:06:44,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:06:44 BoogieIcfgContainer [2020-10-19 20:06:44,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 20:06:44,709 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 20:06:44,709 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 20:06:44,714 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 20:06:44,715 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:06:44,715 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 08:06:43" (1/3) ... [2020-10-19 20:06:44,717 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@68f52c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:06:44, skipping insertion in model container [2020-10-19 20:06:44,717 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:06:44,718 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:06:44" (2/3) ... [2020-10-19 20:06:44,718 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@68f52c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:06:44, skipping insertion in model container [2020-10-19 20:06:44,718 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:06:44,719 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:06:44" (3/3) ... [2020-10-19 20:06:44,721 INFO L373 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2020-10-19 20:06:44,778 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 20:06:44,779 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 20:06:44,779 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 20:06:44,779 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 20:06:44,780 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 20:06:44,780 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 20:06:44,780 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 20:06:44,780 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 20:06:44,797 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2020-10-19 20:06:44,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:06:44,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:44,828 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:44,837 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:06:44,837 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:06:44,838 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 20:06:44,838 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2020-10-19 20:06:44,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:06:44,841 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:44,841 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:44,841 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:06:44,842 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:06:44,851 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 9#L29true call main_#t~ret9 := fibonacci(main_~x~0);< 18#fibonacciENTRYtrue [2020-10-19 20:06:44,852 INFO L796 eck$LassoCheckResult]: Loop: 18#fibonacciENTRYtrue ~n := #in~n; 8#L17true assume !(~n < 1); 12#L19true assume !(1 == ~n); 16#L22true call #t~ret7 := fibonacci(~n - 1);< 18#fibonacciENTRYtrue [2020-10-19 20:06:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash 42783, now seen corresponding path program 1 times [2020-10-19 20:06:44,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:44,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31017101] [2020-10-19 20:06:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:44,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:45,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:45,043 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 1 times [2020-10-19 20:06:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:45,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94210391] [2020-10-19 20:06:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:45,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:45,056 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:45,058 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:45,060 INFO L82 PathProgramCache]: Analyzing trace with hash 856297401, now seen corresponding path program 1 times [2020-10-19 20:06:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:45,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262356975] [2020-10-19 20:06:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:45,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:45,095 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:45,105 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:45,240 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:45,241 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:45,241 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:45,241 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:45,241 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:45,241 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:45,242 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:45,242 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:45,242 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2020-10-19 20:06:45,242 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:45,243 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:45,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,362 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:45,364 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:45,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:45,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:45,395 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:45,396 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=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) [2020-10-19 20:06:45,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:45,470 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 [2020-10-19 20:06:45,475 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:45,475 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=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 [2020-10-19 20:06:45,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:45,509 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:45,513 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:45,513 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=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 [2020-10-19 20:06:45,538 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:45,538 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:45,542 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:45,542 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=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 [2020-10-19 20:06:45,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:45,575 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 [2020-10-19 20:06:45,604 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:06:45,604 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:45,675 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:06:45,678 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:45,678 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:45,678 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:45,678 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:45,678 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:06:45,678 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:45,679 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:45,679 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:45,679 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2020-10-19 20:06:45,679 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:45,680 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:45,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:45,795 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:45,802 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) [2020-10-19 20:06:45,822 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 [2020-10-19 20:06:45,827 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:45,827 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:45,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:45,830 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:45,830 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:45,837 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:45,839 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 [2020-10-19 20:06:45,843 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 [2020-10-19 20:06:45,882 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:06:45,883 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:45,884 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:45,884 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:45,884 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:45,884 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:45,885 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:45,885 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:45,888 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 [2020-10-19 20:06:45,924 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 [2020-10-19 20:06:45,927 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:45,927 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:45,927 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:45,927 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:45,927 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:45,928 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:45,928 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:45,933 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 [2020-10-19 20:06:45,957 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 [2020-10-19 20:06:45,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:45,960 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:45,960 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:45,960 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:45,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:45,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:45,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:45,964 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 [2020-10-19 20:06:45,993 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 [2020-10-19 20:06:45,995 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:45,995 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:45,995 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:45,995 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:45,996 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:45,998 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:45,998 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:46,007 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:06:46,013 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:06:46,013 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 [2020-10-19 20:06:46,027 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:06:46,027 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:06:46,027 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:06:46,028 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2020-10-19 20:06:46,051 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:06:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 20:06:46,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:46,226 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 [2020-10-19 20:06:46,228 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2020-10-19 20:06:46,368 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states.. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 12 states. [2020-10-19 20:06:46,368 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 [2020-10-19 20:06:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 20:06:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-19 20:06:46,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-19 20:06:46,376 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:46,376 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-19 20:06:46,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:46,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-19 20:06:46,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:46,379 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2020-10-19 20:06:46,384 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:06:46,392 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2020-10-19 20:06:46,393 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-19 20:06:46,393 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-19 20:06:46,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-19 20:06:46,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:46,395 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-19 20:06:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-19 20:06:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-19 20:06:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 20:06:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-19 20:06:46,431 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:06:46,431 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:06:46,431 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 20:06:46,431 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-19 20:06:46,433 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:06:46,433 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:46,433 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:46,434 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:46,434 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:46,435 INFO L794 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 123#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 138#fibonacciENTRY ~n := #in~n; 136#L17 assume !(~n < 1); 137#L19 assume !(1 == ~n); 125#L22 call #t~ret7 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 133#L17 assume ~n < 1;#res := 0; 134#fibonacciFINAL assume true; 124#fibonacciEXIT >#31#return; 126#L22-1 [2020-10-19 20:06:46,435 INFO L796 eck$LassoCheckResult]: Loop: 126#L22-1 call #t~ret8 := fibonacci(~n - 2);< 131#fibonacciENTRY ~n := #in~n; 141#L17 assume !(~n < 1); 140#L19 assume !(1 == ~n); 128#L22 call #t~ret7 := fibonacci(~n - 1);< 131#fibonacciENTRY ~n := #in~n; 141#L17 assume ~n < 1;#res := 0; 129#fibonacciFINAL assume true; 139#fibonacciEXIT >#31#return; 126#L22-1 [2020-10-19 20:06:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2073663503, now seen corresponding path program 1 times [2020-10-19 20:06:46,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:46,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884349850] [2020-10-19 20:06:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:06:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:06:46,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884349850] [2020-10-19 20:06:46,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:06:46,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:06:46,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716341222] [2020-10-19 20:06:46,557 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1606275375, now seen corresponding path program 1 times [2020-10-19 20:06:46,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:46,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968906904] [2020-10-19 20:06:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 20:06:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:06:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968906904] [2020-10-19 20:06:46,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:06:46,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:06:46,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089540087] [2020-10-19 20:06:46,611 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:06:46,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:06:46,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 20:06:46,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 20:06:46,616 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-19 20:06:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:06:46,707 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-19 20:06:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 20:06:46,709 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-19 20:06:46,711 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:06:46,712 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-19 20:06:46,712 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-19 20:06:46,713 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-19 20:06:46,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-19 20:06:46,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:46,713 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:06:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-19 20:06:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-19 20:06:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 20:06:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-19 20:06:46,718 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:06:46,718 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:06:46,719 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 20:06:46,719 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-19 20:06:46,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:06:46,720 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:46,720 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:46,721 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:46,721 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:46,722 INFO L794 eck$LassoCheckResult]: Stem: 203#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 195#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 196#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 212#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 211#L19 assume !(1 == ~n); 201#L22 call #t~ret7 := fibonacci(~n - 1);< 205#fibonacciENTRY ~n := #in~n; 207#L17 assume !(~n < 1); 218#L19 assume 1 == ~n;#res := 1; 217#fibonacciFINAL assume true; 216#fibonacciEXIT >#31#return; 199#L22-1 [2020-10-19 20:06:46,722 INFO L796 eck$LassoCheckResult]: Loop: 199#L22-1 call #t~ret8 := fibonacci(~n - 2);< 204#fibonacciENTRY ~n := #in~n; 206#L17 assume !(~n < 1); 210#L19 assume !(1 == ~n); 198#L22 call #t~ret7 := fibonacci(~n - 1);< 204#fibonacciENTRY ~n := #in~n; 206#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 213#fibonacciFINAL assume true; 214#fibonacciEXIT >#31#return; 199#L22-1 [2020-10-19 20:06:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash -140916419, now seen corresponding path program 1 times [2020-10-19 20:06:46,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:46,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59464223] [2020-10-19 20:06:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:06:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:46,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59464223] [2020-10-19 20:06:46,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964962273] [2020-10-19 20:06:46,830 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 [2020-10-19 20:06:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:46,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:06:46,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:46,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:06:46,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-19 20:06:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535420535] [2020-10-19 20:06:46,911 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1745046499, now seen corresponding path program 1 times [2020-10-19 20:06:46,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:46,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689744018] [2020-10-19 20:06:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:46,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:46,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:46,926 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:47,069 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:47,070 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:47,070 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:47,070 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:47,070 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:47,070 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:47,071 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:47,071 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:47,071 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2020-10-19 20:06:47,071 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:47,072 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:47,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,183 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:47,183 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) [2020-10-19 20:06:47,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:47,190 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 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:47,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:06:47,228 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:47,746 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:06:47,749 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:47,749 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:47,749 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:47,749 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:47,749 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:06:47,749 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:47,749 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:47,750 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:47,750 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2020-10-19 20:06:47,750 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:47,750 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:47,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:47,817 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:47,817 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:47,829 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 [2020-10-19 20:06:47,831 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:47,832 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:47,832 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:47,832 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:47,832 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:47,835 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:47,835 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:47,838 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:06:47,843 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:06:47,843 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:47,848 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:06:47,848 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:06:47,848 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:06:47,848 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:47,879 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:06:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:06:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:06:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:48,064 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 [2020-10-19 20:06:48,064 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 8 states. [2020-10-19 20:06:48,331 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 8 states. Result 135 states and 183 transitions. Complement of second has 36 states. [2020-10-19 20:06:48,333 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 [2020-10-19 20:06:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:06:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-19 20:06:48,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2020-10-19 20:06:48,335 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:48,336 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2020-10-19 20:06:48,336 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:48,337 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2020-10-19 20:06:48,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:48,339 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2020-10-19 20:06:48,347 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-10-19 20:06:48,353 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2020-10-19 20:06:48,353 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2020-10-19 20:06:48,354 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2020-10-19 20:06:48,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2020-10-19 20:06:48,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:48,355 INFO L691 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2020-10-19 20:06:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2020-10-19 20:06:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2020-10-19 20:06:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-19 20:06:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-10-19 20:06:48,373 INFO L714 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-10-19 20:06:48,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:06:48,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 20:06:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 20:06:48,375 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 8 states. [2020-10-19 20:06:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:06:48,594 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2020-10-19 20:06:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 20:06:48,596 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2020-10-19 20:06:48,600 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-10-19 20:06:48,604 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2020-10-19 20:06:48,604 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2020-10-19 20:06:48,605 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2020-10-19 20:06:48,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2020-10-19 20:06:48,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:48,605 INFO L691 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2020-10-19 20:06:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2020-10-19 20:06:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-19 20:06:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-19 20:06:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-10-19 20:06:48,632 INFO L714 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-10-19 20:06:48,632 INFO L594 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-10-19 20:06:48,632 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 20:06:48,633 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2020-10-19 20:06:48,635 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-10-19 20:06:48,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:48,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:48,638 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:48,638 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:48,638 INFO L794 eck$LassoCheckResult]: Stem: 749#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(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 736#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 737#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 766#fibonacciENTRY ~n := #in~n; 798#L17 assume !(~n < 1); 791#L19 assume !(1 == ~n); 756#L22 call #t~ret7 := fibonacci(~n - 1);< 757#fibonacciENTRY ~n := #in~n; 760#L17 assume !(~n < 1); 792#L19 assume !(1 == ~n); 759#L22 call #t~ret7 := fibonacci(~n - 1);< 757#fibonacciENTRY ~n := #in~n; 760#L17 assume !(~n < 1); 792#L19 assume !(1 == ~n); 759#L22 call #t~ret7 := fibonacci(~n - 1);< 757#fibonacciENTRY ~n := #in~n; 761#L17 assume !(~n < 1); 797#L19 assume 1 == ~n;#res := 1; 796#fibonacciFINAL assume true; 795#fibonacciEXIT >#31#return; 752#L22-1 call #t~ret8 := fibonacci(~n - 2);< 794#fibonacciENTRY ~n := #in~n; 827#L17 assume ~n < 1;#res := 0; 826#fibonacciFINAL assume true; 825#fibonacciEXIT >#33#return; 824#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 821#fibonacciFINAL assume true; 818#fibonacciEXIT >#31#return; 755#L22-1 [2020-10-19 20:06:48,638 INFO L796 eck$LassoCheckResult]: Loop: 755#L22-1 call #t~ret8 := fibonacci(~n - 2);< 751#fibonacciENTRY ~n := #in~n; 758#L17 assume !(~n < 1); 800#L19 assume !(1 == ~n); 754#L22 call #t~ret7 := fibonacci(~n - 1);< 751#fibonacciENTRY ~n := #in~n; 758#L17 assume !(~n < 1); 800#L19 assume 1 == ~n;#res := 1; 815#fibonacciFINAL assume true; 816#fibonacciEXIT >#31#return; 755#L22-1 [2020-10-19 20:06:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2137317009, now seen corresponding path program 1 times [2020-10-19 20:06:48,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:48,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535092535] [2020-10-19 20:06:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:48,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 20:06:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:48,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:06:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:48,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:06:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:06:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535092535] [2020-10-19 20:06:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500531894] [2020-10-19 20:06:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:06:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:06:48,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:06:48,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:06:48,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-19 20:06:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689434066] [2020-10-19 20:06:48,856 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:48,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1745046499, now seen corresponding path program 2 times [2020-10-19 20:06:48,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:48,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614140668] [2020-10-19 20:06:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:48,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:48,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:48,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:48,974 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:48,975 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:48,975 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:48,975 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:48,975 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:48,975 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:48,975 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:48,975 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:48,975 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2020-10-19 20:06:48,976 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:48,976 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:48,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:48,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:48,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:48,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:49,030 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:49,031 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 20:06:49,037 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:49,037 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 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 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 [2020-10-19 20:06:49,069 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:06:49,070 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:49,642 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:06:49,646 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:49,646 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:49,646 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:49,646 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:49,646 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:06:49,646 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:49,647 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:49,647 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:49,647 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2020-10-19 20:06:49,647 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:49,647 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:49,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:49,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:49,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:49,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:49,711 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:49,711 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-19 20:06:49,729 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 [2020-10-19 20:06:49,731 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:49,731 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:49,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:49,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:49,732 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:49,733 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:49,733 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:49,738 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:49,768 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 [2020-10-19 20:06:49,771 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:49,771 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:49,771 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:49,771 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:49,771 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:49,772 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:49,772 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:49,774 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:49,803 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:49,805 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:49,805 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:49,805 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:49,805 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:49,805 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:49,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:49,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:49,807 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 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 [2020-10-19 20:06:49,831 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 [2020-10-19 20:06:49,833 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:49,833 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:49,833 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:49,833 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:49,833 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:49,836 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:49,836 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:49,838 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:06:49,841 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:06:49,841 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 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 [2020-10-19 20:06:49,844 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:06:49,844 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:06:49,844 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:06:49,844 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-10-19 20:06:49,864 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:06:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:49,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:06:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:49,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:49,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:06:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:50,064 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 [2020-10-19 20:06:50,065 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 8 states. [2020-10-19 20:06:50,339 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 8 states. Result 163 states and 217 transitions. Complement of second has 33 states. [2020-10-19 20:06:50,343 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 [2020-10-19 20:06:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:06:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-19 20:06:50,345 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:06:50,345 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:50,345 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:06:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:50,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:50,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:50,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:06:50,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:50,514 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 [2020-10-19 20:06:50,514 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 8 states. [2020-10-19 20:06:50,712 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 8 states. Result 288 states and 387 transitions. Complement of second has 25 states. [2020-10-19 20:06:50,715 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 [2020-10-19 20:06:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:06:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-19 20:06:50,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:06:50,716 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:50,716 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:06:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:50,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:50,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:50,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:06:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:50,946 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 [2020-10-19 20:06:50,946 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 8 states. [2020-10-19 20:06:51,204 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 8 states. Result 826 states and 1091 transitions. Complement of second has 130 states. [2020-10-19 20:06:51,205 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 [2020-10-19 20:06:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:06:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-19 20:06:51,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:06:51,208 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:51,208 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-19 20:06:51,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:51,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-19 20:06:51,210 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:51,211 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2020-10-19 20:06:51,230 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-19 20:06:51,243 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2020-10-19 20:06:51,243 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2020-10-19 20:06:51,244 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2020-10-19 20:06:51,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2020-10-19 20:06:51,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:51,245 INFO L691 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2020-10-19 20:06:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2020-10-19 20:06:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2020-10-19 20:06:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-19 20:06:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2020-10-19 20:06:51,288 INFO L714 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2020-10-19 20:06:51,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:06:51,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 20:06:51,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-19 20:06:51,289 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 11 states. [2020-10-19 20:06:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:06:51,551 INFO L93 Difference]: Finished difference Result 508 states and 758 transitions. [2020-10-19 20:06:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:06:51,551 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 508 states and 758 transitions. [2020-10-19 20:06:51,565 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:51,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 508 states to 506 states and 755 transitions. [2020-10-19 20:06:51,586 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2020-10-19 20:06:51,588 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 228 [2020-10-19 20:06:51,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 506 states and 755 transitions. [2020-10-19 20:06:51,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:51,589 INFO L691 BuchiCegarLoop]: Abstraction has 506 states and 755 transitions. [2020-10-19 20:06:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states and 755 transitions. [2020-10-19 20:06:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 460. [2020-10-19 20:06:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-19 20:06:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 691 transitions. [2020-10-19 20:06:51,649 INFO L714 BuchiCegarLoop]: Abstraction has 460 states and 691 transitions. [2020-10-19 20:06:51,649 INFO L594 BuchiCegarLoop]: Abstraction has 460 states and 691 transitions. [2020-10-19 20:06:51,649 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 20:06:51,650 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 460 states and 691 transitions. [2020-10-19 20:06:51,654 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:51,655 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:51,655 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:51,657 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:51,657 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:06:51,657 INFO L794 eck$LassoCheckResult]: Stem: 3688#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3668#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 3669#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 3715#fibonacciENTRY ~n := #in~n; 3736#L17 assume !(~n < 1); 3735#L19 assume !(1 == ~n); 3731#L22 call #t~ret7 := fibonacci(~n - 1);< 3733#fibonacciENTRY ~n := #in~n; 3734#L17 assume !(~n < 1); 3730#L19 assume !(1 == ~n); 3720#L22 call #t~ret7 := fibonacci(~n - 1);< 3727#fibonacciENTRY ~n := #in~n; 3728#L17 assume !(~n < 1); 3732#L19 assume !(1 == ~n); 3719#L22 call #t~ret7 := fibonacci(~n - 1);< 3727#fibonacciENTRY ~n := #in~n; 3729#L17 assume !(~n < 1); 3718#L19 assume 1 == ~n;#res := 1; 3721#fibonacciFINAL assume true; 4017#fibonacciEXIT >#31#return; 3773#L22-1 call #t~ret8 := fibonacci(~n - 2);< 3775#fibonacciENTRY ~n := #in~n; 3867#L17 assume !(~n < 1); 3865#L19 assume !(1 == ~n); 3857#L22 call #t~ret7 := fibonacci(~n - 1);< 3858#fibonacciENTRY ~n := #in~n; 3880#L17 assume !(~n < 1); 3869#L19 assume !(1 == ~n); 3870#L22 call #t~ret7 := fibonacci(~n - 1);< 3886#fibonacciENTRY [2020-10-19 20:06:51,657 INFO L796 eck$LassoCheckResult]: Loop: 3886#fibonacciENTRY ~n := #in~n; 3982#L17 assume !(~n < 1); 3980#L19 assume !(1 == ~n); 3883#L22 call #t~ret7 := fibonacci(~n - 1);< 3886#fibonacciENTRY [2020-10-19 20:06:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1062437397, now seen corresponding path program 1 times [2020-10-19 20:06:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:51,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083250569] [2020-10-19 20:06:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:51,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:06:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:06:51,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083250569] [2020-10-19 20:06:51,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429944102] [2020-10-19 20:06:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:06:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:06:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:06:51,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:06:51,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-19 20:06:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882801513] [2020-10-19 20:06:51,887 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 2 times [2020-10-19 20:06:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:51,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777881106] [2020-10-19 20:06:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:51,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:51,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:51,893 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:51,939 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:51,940 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:51,940 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:51,940 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:51,940 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:51,940 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:51,940 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:51,941 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:51,941 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2020-10-19 20:06:51,941 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:51,941 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:51,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:51,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:51,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:51,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:51,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:52,016 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:52,016 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 20:06:52,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:52,025 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:52,029 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:52,029 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:52,069 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:52,069 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:52,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:06:52,108 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:52,184 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:06:52,186 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:52,186 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:52,186 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:52,186 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:52,186 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:06:52,187 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:52,187 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:52,187 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:52,187 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2020-10-19 20:06:52,187 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:52,187 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:52,188 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:52,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:52,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:52,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:52,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:52,272 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:52,273 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:52,276 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 [2020-10-19 20:06:52,278 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:52,278 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:52,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:52,279 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:52,279 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:52,279 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:52,280 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:52,285 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:52,309 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 [2020-10-19 20:06:52,310 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:52,310 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:52,311 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:52,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:52,311 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:52,312 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:52,313 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:52,321 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:06:52,324 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:06:52,324 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:52,327 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:06:52,328 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:06:52,328 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:06:52,328 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:52,359 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:06:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:06:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:52,506 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 [2020-10-19 20:06:52,506 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241 Second operand 5 states. [2020-10-19 20:06:52,583 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241. Second operand 5 states. Result 470 states and 701 transitions. Complement of second has 13 states. [2020-10-19 20:06:52,584 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 [2020-10-19 20:06:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:06:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:06:52,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:06:52,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:52,585 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:06:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:52,711 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 [2020-10-19 20:06:52,711 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241 Second operand 5 states. [2020-10-19 20:06:52,787 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241. Second operand 5 states. Result 470 states and 701 transitions. Complement of second has 13 states. [2020-10-19 20:06:52,787 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 [2020-10-19 20:06:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:06:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:06:52,788 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:06:52,788 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:52,789 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:06:52,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:52,890 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 [2020-10-19 20:06:52,890 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241 Second operand 5 states. [2020-10-19 20:06:52,992 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241. Second operand 5 states. Result 621 states and 875 transitions. Complement of second has 14 states. [2020-10-19 20:06:52,993 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 [2020-10-19 20:06:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:06:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-19 20:06:52,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:06:52,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:52,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-19 20:06:52,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:52,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-19 20:06:52,997 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:52,997 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 621 states and 875 transitions. [2020-10-19 20:06:53,007 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:53,017 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 621 states to 524 states and 766 transitions. [2020-10-19 20:06:53,018 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 191 [2020-10-19 20:06:53,018 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 200 [2020-10-19 20:06:53,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 524 states and 766 transitions. [2020-10-19 20:06:53,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:53,019 INFO L691 BuchiCegarLoop]: Abstraction has 524 states and 766 transitions. [2020-10-19 20:06:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states and 766 transitions. [2020-10-19 20:06:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 494. [2020-10-19 20:06:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-19 20:06:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 730 transitions. [2020-10-19 20:06:53,040 INFO L714 BuchiCegarLoop]: Abstraction has 494 states and 730 transitions. [2020-10-19 20:06:53,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:06:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 20:06:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-19 20:06:53,041 INFO L87 Difference]: Start difference. First operand 494 states and 730 transitions. Second operand 12 states. [2020-10-19 20:06:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:06:53,252 INFO L93 Difference]: Finished difference Result 549 states and 824 transitions. [2020-10-19 20:06:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:06:53,253 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 549 states and 824 transitions. [2020-10-19 20:06:53,263 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:53,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 549 states to 546 states and 816 transitions. [2020-10-19 20:06:53,273 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 215 [2020-10-19 20:06:53,274 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 215 [2020-10-19 20:06:53,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 546 states and 816 transitions. [2020-10-19 20:06:53,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:53,274 INFO L691 BuchiCegarLoop]: Abstraction has 546 states and 816 transitions. [2020-10-19 20:06:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states and 816 transitions. [2020-10-19 20:06:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 515. [2020-10-19 20:06:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-19 20:06:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 770 transitions. [2020-10-19 20:06:53,301 INFO L714 BuchiCegarLoop]: Abstraction has 515 states and 770 transitions. [2020-10-19 20:06:53,301 INFO L594 BuchiCegarLoop]: Abstraction has 515 states and 770 transitions. [2020-10-19 20:06:53,301 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 20:06:53,302 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 515 states and 770 transitions. [2020-10-19 20:06:53,308 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:53,308 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:53,308 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:53,309 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:53,309 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:06:53,310 INFO L794 eck$LassoCheckResult]: Stem: 7229#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(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7213#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 7214#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 7241#fibonacciENTRY ~n := #in~n; 7242#L17 assume !(~n < 1); 7279#L19 assume !(1 == ~n); 7275#L22 call #t~ret7 := fibonacci(~n - 1);< 7278#fibonacciENTRY ~n := #in~n; 7277#L17 assume !(~n < 1); 7276#L19 assume !(1 == ~n); 7273#L22 call #t~ret7 := fibonacci(~n - 1);< 7272#fibonacciENTRY ~n := #in~n; 7274#L17 assume !(~n < 1); 7291#L19 assume !(1 == ~n); 7283#L22 call #t~ret7 := fibonacci(~n - 1);< 7288#fibonacciENTRY ~n := #in~n; 7320#L17 assume !(~n < 1); 7314#L19 assume !(1 == ~n); 7282#L22 call #t~ret7 := fibonacci(~n - 1);< 7288#fibonacciENTRY ~n := #in~n; 7321#L17 assume !(~n < 1); 7379#L19 assume 1 == ~n;#res := 1; 7377#fibonacciFINAL assume true; 7376#fibonacciEXIT >#31#return; 7345#L22-1 call #t~ret8 := fibonacci(~n - 2);< 7349#fibonacciENTRY ~n := #in~n; 7622#L17 assume !(~n < 1); 7618#L19 assume !(1 == ~n); 7619#L22 call #t~ret7 := fibonacci(~n - 1);< 7630#fibonacciENTRY ~n := #in~n; 7718#L17 assume !(~n < 1); 7717#L19 assume !(1 == ~n); 7259#L22 call #t~ret7 := fibonacci(~n - 1);< 7263#fibonacciENTRY ~n := #in~n; 7264#L17 assume !(~n < 1); 7721#L19 assume !(1 == ~n); 7260#L22 [2020-10-19 20:06:53,310 INFO L796 eck$LassoCheckResult]: Loop: 7260#L22 call #t~ret7 := fibonacci(~n - 1);< 7263#fibonacciENTRY ~n := #in~n; 7264#L17 assume !(~n < 1); 7721#L19 assume !(1 == ~n); 7260#L22 [2020-10-19 20:06:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash -331346849, now seen corresponding path program 2 times [2020-10-19 20:06:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:53,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278533799] [2020-10-19 20:06:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:53,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:06:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 20:06:53,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278533799] [2020-10-19 20:06:53,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375544536] [2020-10-19 20:06:53,448 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:06:53,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:06:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:06:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:06:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 20:06:53,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:06:53,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-19 20:06:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358525607] [2020-10-19 20:06:53,532 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 3 times [2020-10-19 20:06:53,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:53,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597187616] [2020-10-19 20:06:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:53,536 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:53,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:53,539 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:53,587 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:53,588 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:53,588 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:53,588 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:53,588 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:53,588 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:53,588 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:53,588 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:53,589 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2020-10-19 20:06:53,589 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:53,589 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:53,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:53,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:53,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:53,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:53,671 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:53,672 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:53,679 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:53,679 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:53,744 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:06:53,745 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:55,670 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:06:55,673 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:55,673 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:55,673 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:55,673 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:55,673 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:06:55,673 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:55,674 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:55,674 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:55,674 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2020-10-19 20:06:55,674 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:55,674 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:55,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:55,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:55,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:55,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:55,740 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:55,740 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 [2020-10-19 20:06:55,744 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 [2020-10-19 20:06:55,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:55,745 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:55,745 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:55,746 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:55,746 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:55,747 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:55,747 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:55,753 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:06:55,756 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:06:55,756 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:55,759 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:06:55,759 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:06:55,759 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:06:55,759 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:55,791 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:06:55,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:06:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:55,923 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 [2020-10-19 20:06:55,923 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265 Second operand 6 states. [2020-10-19 20:06:56,003 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265. Second operand 6 states. Result 527 states and 783 transitions. Complement of second has 18 states. [2020-10-19 20:06:56,004 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 [2020-10-19 20:06:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:06:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:06:56,006 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:06:56,006 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:56,006 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:06:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:56,131 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 [2020-10-19 20:06:56,131 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265 Second operand 6 states. [2020-10-19 20:06:56,241 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265. Second operand 6 states. Result 757 states and 1105 transitions. Complement of second has 22 states. [2020-10-19 20:06:56,242 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 [2020-10-19 20:06:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:06:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:06:56,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:06:56,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:56,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-19 20:06:56,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:56,245 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-19 20:06:56,245 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:56,245 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 757 states and 1105 transitions. [2020-10-19 20:06:56,256 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:56,267 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 757 states to 693 states and 1036 transitions. [2020-10-19 20:06:56,268 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2020-10-19 20:06:56,269 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2020-10-19 20:06:56,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 693 states and 1036 transitions. [2020-10-19 20:06:56,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:56,269 INFO L691 BuchiCegarLoop]: Abstraction has 693 states and 1036 transitions. [2020-10-19 20:06:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states and 1036 transitions. [2020-10-19 20:06:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 680. [2020-10-19 20:06:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-19 20:06:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1019 transitions. [2020-10-19 20:06:56,296 INFO L714 BuchiCegarLoop]: Abstraction has 680 states and 1019 transitions. [2020-10-19 20:06:56,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:06:56,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 20:06:56,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-19 20:06:56,297 INFO L87 Difference]: Start difference. First operand 680 states and 1019 transitions. Second operand 14 states. [2020-10-19 20:06:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:06:56,552 INFO L93 Difference]: Finished difference Result 743 states and 1113 transitions. [2020-10-19 20:06:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 20:06:56,553 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 743 states and 1113 transitions. [2020-10-19 20:06:56,564 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:56,579 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 743 states to 733 states and 1098 transitions. [2020-10-19 20:06:56,579 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 272 [2020-10-19 20:06:56,580 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 272 [2020-10-19 20:06:56,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 733 states and 1098 transitions. [2020-10-19 20:06:56,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:56,581 INFO L691 BuchiCegarLoop]: Abstraction has 733 states and 1098 transitions. [2020-10-19 20:06:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states and 1098 transitions. [2020-10-19 20:06:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 720. [2020-10-19 20:06:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-10-19 20:06:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1073 transitions. [2020-10-19 20:06:56,615 INFO L714 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-10-19 20:06:56,615 INFO L594 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-10-19 20:06:56,615 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 20:06:56,616 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 720 states and 1073 transitions. [2020-10-19 20:06:56,621 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:56,622 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:56,622 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:56,623 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:56,624 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:06:56,624 INFO L794 eck$LassoCheckResult]: Stem: 10903#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(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10880#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 10881#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 10927#fibonacciENTRY ~n := #in~n; 10999#L17 assume !(~n < 1); 10997#L19 assume !(1 == ~n); 10994#L22 call #t~ret7 := fibonacci(~n - 1);< 10995#fibonacciENTRY ~n := #in~n; 11011#L17 assume !(~n < 1); 11009#L19 assume !(1 == ~n); 11006#L22 call #t~ret7 := fibonacci(~n - 1);< 11007#fibonacciENTRY ~n := #in~n; 11020#L17 assume !(~n < 1); 11019#L19 assume !(1 == ~n); 11002#L22 call #t~ret7 := fibonacci(~n - 1);< 11018#fibonacciENTRY ~n := #in~n; 11046#L17 assume !(~n < 1); 11038#L19 assume !(1 == ~n); 11026#L22 call #t~ret7 := fibonacci(~n - 1);< 11036#fibonacciENTRY ~n := #in~n; 11088#L17 assume !(~n < 1); 11081#L19 assume !(1 == ~n); 11023#L22 call #t~ret7 := fibonacci(~n - 1);< 11071#fibonacciENTRY ~n := #in~n; 11097#L17 assume !(~n < 1); 11096#L19 assume 1 == ~n;#res := 1; 11095#fibonacciFINAL assume true; 11093#fibonacciEXIT >#31#return; 11083#L22-1 call #t~ret8 := fibonacci(~n - 2);< 11086#fibonacciENTRY ~n := #in~n; 11091#L17 assume ~n < 1;#res := 0; 11089#fibonacciFINAL assume true; 11082#fibonacciEXIT >#33#return; 11080#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11070#fibonacciFINAL assume true; 11035#fibonacciEXIT >#31#return; 11014#L22-1 call #t~ret8 := fibonacci(~n - 2);< 11017#fibonacciENTRY ~n := #in~n; 11132#L17 assume !(~n < 1); 11078#L19 assume !(1 == ~n); 11075#L22 call #t~ret7 := fibonacci(~n - 1);< 11076#fibonacciENTRY ~n := #in~n; 11392#L17 assume !(~n < 1); 11390#L19 assume !(1 == ~n); 11374#L22 call #t~ret7 := fibonacci(~n - 1);< 11384#fibonacciENTRY ~n := #in~n; 11411#L17 assume !(~n < 1); 11423#L19 assume !(1 == ~n); 11375#L22 [2020-10-19 20:06:56,624 INFO L796 eck$LassoCheckResult]: Loop: 11375#L22 call #t~ret7 := fibonacci(~n - 1);< 11384#fibonacciENTRY ~n := #in~n; 11411#L17 assume !(~n < 1); 11423#L19 assume !(1 == ~n); 11375#L22 [2020-10-19 20:06:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1097579499, now seen corresponding path program 2 times [2020-10-19 20:06:56,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:56,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134765920] [2020-10-19 20:06:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:56,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:06:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:56,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:06:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:56,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:06:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 20:06:56,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134765920] [2020-10-19 20:06:56,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472605345] [2020-10-19 20:06:56,769 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:06:56,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:06:56,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:06:56,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:06:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 20:06:56,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:06:56,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-19 20:06:56,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313647176] [2020-10-19 20:06:56,874 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 4 times [2020-10-19 20:06:56,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:56,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934317532] [2020-10-19 20:06:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:56,878 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:56,880 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:56,882 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:56,930 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:56,931 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:56,931 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:56,931 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:56,931 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:56,931 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:56,931 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:56,931 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:56,932 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2020-10-19 20:06:56,932 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:56,932 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:56,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:56,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:56,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:56,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:57,008 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:57,008 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2020-10-19 20:06:57,012 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:57,012 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:57,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:57,016 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:57,053 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:57,053 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:57,055 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:57,055 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:57,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:57,080 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:06:57,082 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:06:57,082 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:57,106 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:06:57,106 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:57,159 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:06:57,159 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:58,141 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:06:58,144 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:58,144 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:58,144 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:58,144 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:58,144 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:06:58,144 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:58,145 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:58,145 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:58,145 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2020-10-19 20:06:58,145 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:58,145 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:58,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:58,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:58,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:58,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:58,210 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:06:58,210 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2020-10-19 20:06:58,217 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 [2020-10-19 20:06:58,218 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:58,219 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:58,219 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:58,219 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:58,219 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:58,220 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:58,220 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:58,221 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 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 [2020-10-19 20:06:58,244 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 [2020-10-19 20:06:58,245 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:58,245 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:58,246 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:58,246 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:58,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:06:58,246 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:58,246 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:58,251 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:06:58,273 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 [2020-10-19 20:06:58,275 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:06:58,275 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:06:58,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:06:58,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:06:58,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:58,276 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:06:58,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:06:58,279 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:06:58,281 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:06:58,281 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 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 [2020-10-19 20:06:58,284 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:06:58,284 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:06:58,284 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:06:58,284 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-10-19 20:06:58,304 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:06:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:06:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:58,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:58,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:58,453 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 [2020-10-19 20:06:58,453 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366 Second operand 6 states. [2020-10-19 20:06:58,529 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366. Second operand 6 states. Result 739 states and 1093 transitions. Complement of second has 18 states. [2020-10-19 20:06:58,531 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 [2020-10-19 20:06:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:06:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:06:58,532 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:06:58,532 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:58,532 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:06:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:58,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:58,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:58,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:58,707 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 [2020-10-19 20:06:58,707 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366 Second operand 6 states. [2020-10-19 20:06:58,854 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366. Second operand 6 states. Result 920 states and 1304 transitions. Complement of second has 22 states. [2020-10-19 20:06:58,855 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 [2020-10-19 20:06:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:06:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:06:58,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:06:58,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:58,856 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:06:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:06:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:58,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:58,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:06:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:06:58,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:06:59,021 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 [2020-10-19 20:06:59,021 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366 Second operand 6 states. [2020-10-19 20:06:59,112 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366. Second operand 6 states. Result 967 states and 1393 transitions. Complement of second has 27 states. [2020-10-19 20:06:59,112 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 [2020-10-19 20:06:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:06:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:06:59,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:06:59,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:59,116 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-19 20:06:59,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:59,116 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-19 20:06:59,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:06:59,118 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 967 states and 1393 transitions. [2020-10-19 20:06:59,133 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:59,144 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 967 states to 720 states and 1073 transitions. [2020-10-19 20:06:59,144 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 220 [2020-10-19 20:06:59,145 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 256 [2020-10-19 20:06:59,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 720 states and 1073 transitions. [2020-10-19 20:06:59,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:59,145 INFO L691 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-10-19 20:06:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states and 1073 transitions. [2020-10-19 20:06:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2020-10-19 20:06:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-10-19 20:06:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1073 transitions. [2020-10-19 20:06:59,170 INFO L714 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-10-19 20:06:59,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:06:59,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 20:06:59,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-19 20:06:59,171 INFO L87 Difference]: Start difference. First operand 720 states and 1073 transitions. Second operand 15 states. [2020-10-19 20:06:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:06:59,514 INFO L93 Difference]: Finished difference Result 785 states and 1155 transitions. [2020-10-19 20:06:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 20:06:59,515 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 785 states and 1155 transitions. [2020-10-19 20:06:59,526 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:59,537 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 785 states to 785 states and 1155 transitions. [2020-10-19 20:06:59,537 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 295 [2020-10-19 20:06:59,539 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 295 [2020-10-19 20:06:59,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 785 states and 1155 transitions. [2020-10-19 20:06:59,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:06:59,539 INFO L691 BuchiCegarLoop]: Abstraction has 785 states and 1155 transitions. [2020-10-19 20:06:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states and 1155 transitions. [2020-10-19 20:06:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 744. [2020-10-19 20:06:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-19 20:06:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1109 transitions. [2020-10-19 20:06:59,564 INFO L714 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-10-19 20:06:59,564 INFO L594 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-10-19 20:06:59,564 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 20:06:59,565 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 744 states and 1109 transitions. [2020-10-19 20:06:59,570 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:06:59,570 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:06:59,570 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:06:59,573 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:06:59,574 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:06:59,575 INFO L794 eck$LassoCheckResult]: Stem: 16523#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(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16506#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 16507#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 16545#fibonacciENTRY ~n := #in~n; 16626#L17 assume !(~n < 1); 16625#L19 assume !(1 == ~n); 16621#L22 call #t~ret7 := fibonacci(~n - 1);< 16624#fibonacciENTRY ~n := #in~n; 16623#L17 assume !(~n < 1); 16622#L19 assume !(1 == ~n); 16617#L22 call #t~ret7 := fibonacci(~n - 1);< 16620#fibonacciENTRY ~n := #in~n; 16619#L17 assume !(~n < 1); 16618#L19 assume !(1 == ~n); 16610#L22 call #t~ret7 := fibonacci(~n - 1);< 16616#fibonacciENTRY ~n := #in~n; 16614#L17 assume !(~n < 1); 16612#L19 assume !(1 == ~n); 16597#L22 call #t~ret7 := fibonacci(~n - 1);< 16602#fibonacciENTRY ~n := #in~n; 16608#L17 assume !(~n < 1); 16606#L19 assume !(1 == ~n); 16598#L22 call #t~ret7 := fibonacci(~n - 1);< 16602#fibonacciENTRY ~n := #in~n; 16609#L17 assume !(~n < 1); 16607#L19 assume 1 == ~n;#res := 1; 16604#fibonacciFINAL assume true; 16596#fibonacciEXIT >#31#return; 16595#L22-1 call #t~ret8 := fibonacci(~n - 2);< 16711#fibonacciENTRY ~n := #in~n; 16737#L17 assume !(~n < 1); 16736#L19 assume !(1 == ~n); 16592#L22 call #t~ret7 := fibonacci(~n - 1);< 16600#fibonacciENTRY ~n := #in~n; 16615#L17 assume !(~n < 1); 17249#L19 assume !(1 == ~n); 17141#L22 call #t~ret7 := fibonacci(~n - 1);< 17168#fibonacciENTRY ~n := #in~n; 17237#L17 assume !(~n < 1); 17236#L19 assume 1 == ~n;#res := 1; 17234#fibonacciFINAL assume true; 17166#fibonacciEXIT >#31#return; 16890#L22-1 call #t~ret8 := fibonacci(~n - 2);< 16891#fibonacciENTRY ~n := #in~n; 17231#L17 assume ~n < 1;#res := 0; 17169#fibonacciFINAL assume true; 17156#fibonacciEXIT >#33#return; 16796#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16793#fibonacciFINAL assume true; 16741#fibonacciEXIT >#31#return; 16707#L22-1 call #t~ret8 := fibonacci(~n - 2);< 16739#fibonacciENTRY ~n := #in~n; 16805#L17 assume !(~n < 1); 16803#L19 assume !(1 == ~n); 16745#L22 call #t~ret7 := fibonacci(~n - 1);< 16747#fibonacciENTRY ~n := #in~n; 16810#L17 assume !(~n < 1); 17058#L19 assume !(1 == ~n); 16838#L22 call #t~ret7 := fibonacci(~n - 1);< 16846#fibonacciENTRY ~n := #in~n; 16997#L17 assume !(~n < 1); 16996#L19 assume !(1 == ~n); 16839#L22 [2020-10-19 20:06:59,575 INFO L796 eck$LassoCheckResult]: Loop: 16839#L22 call #t~ret7 := fibonacci(~n - 1);< 16846#fibonacciENTRY ~n := #in~n; 16997#L17 assume !(~n < 1); 16996#L19 assume !(1 == ~n); 16839#L22 [2020-10-19 20:06:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -717787987, now seen corresponding path program 3 times [2020-10-19 20:06:59,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:59,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255135088] [2020-10-19 20:06:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:59,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 20:06:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-19 20:06:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:59,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:06:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:06:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:06:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-19 20:06:59,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255135088] [2020-10-19 20:06:59,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54145094] [2020-10-19 20:06:59,754 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:06:59,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-19 20:06:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:06:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:06:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:06:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-19 20:06:59,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:06:59,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-19 20:06:59,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377271647] [2020-10-19 20:06:59,944 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:06:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:06:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 5 times [2020-10-19 20:06:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:06:59,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925494504] [2020-10-19 20:06:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:06:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:59,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:06:59,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:06:59,950 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:06:59,992 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:06:59,992 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:06:59,992 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:06:59,992 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:06:59,992 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:06:59,992 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:06:59,993 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:06:59,993 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:06:59,993 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2020-10-19 20:06:59,993 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:06:59,993 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:06:59,994 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:06:59,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:00,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:00,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:00,064 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:00,065 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 20:07:00,070 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:00,070 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:00,072 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:00,072 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:00,094 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:00,094 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:00,097 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:00,097 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:00,119 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:00,119 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) [2020-10-19 20:07:00,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:00,153 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 [2020-10-19 20:07:08,149 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:08,151 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:08,151 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:08,151 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:08,152 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:08,152 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:08,152 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:08,152 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:08,152 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:08,152 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2020-10-19 20:07:08,152 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:08,152 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:08,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:08,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:08,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:08,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:08,219 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:08,219 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:08,230 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 [2020-10-19 20:07:08,232 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:08,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:08,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:08,233 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:08,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:08,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:08,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:08,236 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:08,259 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 [2020-10-19 20:07:08,260 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:08,261 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:08,261 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:08,261 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:08,261 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:08,262 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:08,262 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:08,267 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) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:08,303 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 [2020-10-19 20:07:08,304 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:08,304 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:08,304 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:08,304 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:08,304 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:08,305 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:08,305 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:08,307 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) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:08,331 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 [2020-10-19 20:07:08,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:08,332 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:08,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:08,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:08,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:08,334 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:08,334 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:08,336 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:08,340 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:07:08,341 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 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 [2020-10-19 20:07:08,345 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:08,345 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:08,345 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:08,345 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-10-19 20:07:08,366 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:07:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:08,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:08,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:08,534 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 [2020-10-19 20:07:08,535 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378 Second operand 6 states. [2020-10-19 20:07:08,601 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378. Second operand 6 states. Result 763 states and 1129 transitions. Complement of second has 18 states. [2020-10-19 20:07:08,601 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 [2020-10-19 20:07:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:07:08,602 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:07:08,602 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:08,602 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:07:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:08,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:08,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:08,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:08,748 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 [2020-10-19 20:07:08,749 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378 Second operand 6 states. [2020-10-19 20:07:08,846 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378. Second operand 6 states. Result 944 states and 1340 transitions. Complement of second has 22 states. [2020-10-19 20:07:08,847 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 [2020-10-19 20:07:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:07:08,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:07:08,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:08,849 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:07:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:09,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:09,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:09,086 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 [2020-10-19 20:07:09,086 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378 Second operand 6 states. [2020-10-19 20:07:09,180 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378. Second operand 6 states. Result 991 states and 1429 transitions. Complement of second has 27 states. [2020-10-19 20:07:09,180 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 [2020-10-19 20:07:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:07:09,181 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:07:09,181 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:09,182 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-19 20:07:09,182 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:09,182 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-19 20:07:09,183 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:09,183 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 991 states and 1429 transitions. [2020-10-19 20:07:09,194 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:09,205 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 991 states to 744 states and 1109 transitions. [2020-10-19 20:07:09,205 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2020-10-19 20:07:09,206 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2020-10-19 20:07:09,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 744 states and 1109 transitions. [2020-10-19 20:07:09,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:09,206 INFO L691 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-10-19 20:07:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states and 1109 transitions. [2020-10-19 20:07:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2020-10-19 20:07:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-19 20:07:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1109 transitions. [2020-10-19 20:07:09,229 INFO L714 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-10-19 20:07:09,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-19 20:07:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-19 20:07:09,230 INFO L87 Difference]: Start difference. First operand 744 states and 1109 transitions. Second operand 23 states. [2020-10-19 20:07:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:09,803 INFO L93 Difference]: Finished difference Result 456 states and 594 transitions. [2020-10-19 20:07:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-19 20:07:09,803 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 594 transitions. [2020-10-19 20:07:09,809 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:07:09,813 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 511 transitions. [2020-10-19 20:07:09,813 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-10-19 20:07:09,814 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-10-19 20:07:09,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 511 transitions. [2020-10-19 20:07:09,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:09,814 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 511 transitions. [2020-10-19 20:07:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 511 transitions. [2020-10-19 20:07:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-10-19 20:07:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-19 20:07:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 429 transitions. [2020-10-19 20:07:09,824 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 429 transitions. [2020-10-19 20:07:09,824 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 429 transitions. [2020-10-19 20:07:09,825 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 20:07:09,825 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 429 transitions. [2020-10-19 20:07:09,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:07:09,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:09,827 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:09,830 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:07:09,830 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:09,831 INFO L794 eck$LassoCheckResult]: Stem: 22126#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(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22106#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 22107#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 22148#fibonacciENTRY ~n := #in~n; 22235#L17 assume !(~n < 1); 22233#L19 assume !(1 == ~n); 22229#L22 call #t~ret7 := fibonacci(~n - 1);< 22230#fibonacciENTRY ~n := #in~n; 22264#L17 assume !(~n < 1); 22261#L19 assume !(1 == ~n); 22239#L22 call #t~ret7 := fibonacci(~n - 1);< 22242#fibonacciENTRY ~n := #in~n; 22254#L17 assume !(~n < 1); 22253#L19 assume !(1 == ~n); 22237#L22 call #t~ret7 := fibonacci(~n - 1);< 22240#fibonacciENTRY ~n := #in~n; 22259#L17 assume !(~n < 1); 22258#L19 assume !(1 == ~n); 22256#L22 call #t~ret7 := fibonacci(~n - 1);< 22257#fibonacciENTRY ~n := #in~n; 22379#L17 assume !(~n < 1); 22377#L19 assume !(1 == ~n); 22141#L22 call #t~ret7 := fibonacci(~n - 1);< 22140#fibonacciENTRY ~n := #in~n; 22143#L17 assume !(~n < 1); 22147#L19 assume !(1 == ~n); 22142#L22 call #t~ret7 := fibonacci(~n - 1);< 22140#fibonacciENTRY ~n := #in~n; 22143#L17 assume !(~n < 1); 22147#L19 assume !(1 == ~n); 22142#L22 call #t~ret7 := fibonacci(~n - 1);< 22140#fibonacciENTRY ~n := #in~n; 22143#L17 assume !(~n < 1); 22147#L19 assume !(1 == ~n); 22142#L22 call #t~ret7 := fibonacci(~n - 1);< 22376#fibonacciENTRY ~n := #in~n; 22414#L17 assume !(~n < 1); 22413#L19 assume 1 == ~n;#res := 1; 22412#fibonacciFINAL assume true; 22411#fibonacciEXIT >#31#return; 22408#L22-1 call #t~ret8 := fibonacci(~n - 2);< 22409#fibonacciENTRY ~n := #in~n; 22422#L17 assume ~n < 1;#res := 0; 22421#fibonacciFINAL assume true; 22407#fibonacciEXIT >#33#return; 22404#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22402#fibonacciFINAL assume true; 22394#fibonacciEXIT >#31#return; 22137#L22-1 call #t~ret8 := fibonacci(~n - 2);< 22386#fibonacciENTRY ~n := #in~n; 22396#L17 assume !(~n < 1); 22389#L19 assume 1 == ~n;#res := 1; 22388#fibonacciFINAL assume true; 22383#fibonacciEXIT >#33#return; 22382#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22381#fibonacciFINAL assume true; 22263#fibonacciEXIT >#31#return; 22139#L22-1 call #t~ret8 := fibonacci(~n - 2);< 22250#fibonacciENTRY ~n := #in~n; 22397#L17 assume !(~n < 1); 22390#L19 assume !(1 == ~n); 22109#L22 call #t~ret7 := fibonacci(~n - 1);< 22212#fibonacciENTRY ~n := #in~n; 22214#L17 assume !(~n < 1); 22200#L19 assume !(1 == ~n); 22169#L22 call #t~ret7 := fibonacci(~n - 1);< 22171#fibonacciENTRY ~n := #in~n; 22194#L17 assume !(~n < 1); 22190#L19 assume !(1 == ~n); 22167#L22 [2020-10-19 20:07:09,832 INFO L796 eck$LassoCheckResult]: Loop: 22167#L22 call #t~ret7 := fibonacci(~n - 1);< 22171#fibonacciENTRY ~n := #in~n; 22194#L17 assume !(~n < 1); 22190#L19 assume !(1 == ~n); 22167#L22 [2020-10-19 20:07:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1290699209, now seen corresponding path program 4 times [2020-10-19 20:07:09,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:09,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794685260] [2020-10-19 20:07:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:10,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 20:07:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:10,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:07:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:10,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:07:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-19 20:07:10,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794685260] [2020-10-19 20:07:10,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149041931] [2020-10-19 20:07:10,083 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:10,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 20:07:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:07:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:07:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-19 20:07:10,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:10,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2020-10-19 20:07:10,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752811430] [2020-10-19 20:07:10,190 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 6 times [2020-10-19 20:07:10,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:10,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490366295] [2020-10-19 20:07:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:10,194 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:10,195 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:10,196 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:10,238 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:10,238 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:10,238 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:10,238 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:10,238 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:10,238 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:10,239 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:10,239 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:10,239 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2020-10-19 20:07:10,239 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:10,239 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:10,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:10,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:10,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:10,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:10,299 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:10,299 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:10,303 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:10,303 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:10,305 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:10,305 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:10,328 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:10,328 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 61 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 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 [2020-10-19 20:07:10,356 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:10,357 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:18,258 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:18,261 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:18,261 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:18,261 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:18,261 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:18,261 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:18,261 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:18,262 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:18,262 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:18,262 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2020-10-19 20:07:18,262 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:18,262 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:18,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:18,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:18,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:18,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:18,318 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:18,319 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2020-10-19 20:07:18,322 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 [2020-10-19 20:07:18,323 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:18,323 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:18,323 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:18,323 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:18,323 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:18,324 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:18,324 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:18,325 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 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 [2020-10-19 20:07:18,347 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 [2020-10-19 20:07:18,348 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:18,349 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:18,349 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:18,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:18,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:18,350 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:18,350 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:18,358 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:18,361 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:18,361 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 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 [2020-10-19 20:07:18,367 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:18,368 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:18,368 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:18,368 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-10-19 20:07:18,386 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:07:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:18,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:18,560 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 [2020-10-19 20:07:18,561 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115 Second operand 6 states. [2020-10-19 20:07:18,622 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115. Second operand 6 states. Result 337 states and 449 transitions. Complement of second has 18 states. [2020-10-19 20:07:18,622 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 [2020-10-19 20:07:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:07:18,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-19 20:07:18,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:18,624 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:07:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:18,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:18,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:18,783 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 [2020-10-19 20:07:18,783 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115 Second operand 6 states. [2020-10-19 20:07:18,885 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115. Second operand 6 states. Result 343 states and 455 transitions. Complement of second has 17 states. [2020-10-19 20:07:18,886 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 [2020-10-19 20:07:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:07:18,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-19 20:07:18,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:18,887 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:07:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:19,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:19,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:19,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:19,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:19,060 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 [2020-10-19 20:07:19,060 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115 Second operand 6 states. [2020-10-19 20:07:19,136 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115. Second operand 6 states. Result 424 states and 559 transitions. Complement of second has 27 states. [2020-10-19 20:07:19,137 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 [2020-10-19 20:07:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:07:19,138 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-19 20:07:19,138 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:19,138 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-19 20:07:19,139 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:19,139 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-19 20:07:19,140 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:19,140 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 559 transitions. [2020-10-19 20:07:19,145 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:07:19,149 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 439 transitions. [2020-10-19 20:07:19,149 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-10-19 20:07:19,150 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-19 20:07:19,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 439 transitions. [2020-10-19 20:07:19,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:19,152 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 439 transitions. [2020-10-19 20:07:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 439 transitions. [2020-10-19 20:07:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-10-19 20:07:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-19 20:07:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 429 transitions. [2020-10-19 20:07:19,164 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 429 transitions. [2020-10-19 20:07:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-19 20:07:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2020-10-19 20:07:19,166 INFO L87 Difference]: Start difference. First operand 318 states and 429 transitions. Second operand 22 states. [2020-10-19 20:07:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:19,611 INFO L93 Difference]: Finished difference Result 401 states and 498 transitions. [2020-10-19 20:07:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-19 20:07:19,612 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 401 states and 498 transitions. [2020-10-19 20:07:19,615 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:07:19,615 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 401 states to 0 states and 0 transitions. [2020-10-19 20:07:19,615 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:07:19,615 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:07:19,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:07:19,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:07:19,616 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:19,616 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:19,616 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:19,616 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 20:07:19,617 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 20:07:19,617 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:07:19,617 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 20:07:19,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 08:07:19 BoogieIcfgContainer [2020-10-19 20:07:19,626 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 20:07:19,626 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 20:07:19,626 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 20:07:19,627 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 20:07:19,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:06:44" (3/4) ... [2020-10-19 20:07:19,630 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 20:07:19,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 20:07:19,633 INFO L168 Benchmark]: Toolchain (without parser) took 35727.06 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 349.7 MB). Free memory was 955.9 MB in the beginning and 845.2 MB in the end (delta: 110.7 MB). Peak memory consumption was 460.4 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:19,634 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:07:19,635 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.60 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:19,636 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:19,639 INFO L168 Benchmark]: Boogie Preprocessor took 35.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:07:19,642 INFO L168 Benchmark]: RCFGBuilder took 412.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:19,643 INFO L168 Benchmark]: BuchiAutomizer took 34916.97 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 235.4 MB). Free memory was 1.1 GB in the beginning and 845.2 MB in the end (delta: 238.7 MB). Peak memory consumption was 474.1 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:19,643 INFO L168 Benchmark]: Witness Printer took 4.66 ms. Allocated memory is still 1.4 GB. Free memory is still 845.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:07:19,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 237.60 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 108.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 412.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 34916.97 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 235.4 MB). Free memory was 1.1 GB in the beginning and 845.2 MB in the end (delta: 238.7 MB). Peak memory consumption was 474.1 MB. Max. memory is 11.5 GB. * Witness Printer took 4.66 ms. Allocated memory is still 1.4 GB. Free memory is still 845.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (8 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 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. 8 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 34.8s and 10 iterations. TraceHistogramMax:14. Analysis of lassos took 25.9s. Construction of modules took 2.0s. Büchi inclusion checks took 5.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 356 StatesRemovedByMinimization, 12 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 744 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 354 SDtfs, 837 SDslu, 658 SDs, 0 SdLazy, 2121 SolverSat, 516 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf90 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 39ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 20.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...