./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 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-simple/fibo_10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faad93e560ba524ae1ece04545479d8bfc495d5f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 20:07:32,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 20:07:32,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 20:07:32,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 20:07:32,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 20:07:32,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 20:07:32,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 20:07:32,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 20:07:32,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 20:07:32,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 20:07:32,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 20:07:32,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 20:07:32,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 20:07:32,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 20:07:32,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 20:07:32,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 20:07:32,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 20:07:32,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 20:07:32,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 20:07:32,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 20:07:32,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 20:07:32,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 20:07:32,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 20:07:32,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 20:07:32,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 20:07:32,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 20:07:32,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 20:07:32,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 20:07:32,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 20:07:32,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 20:07:32,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 20:07:32,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 20:07:32,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 20:07:32,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 20:07:32,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 20:07:32,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 20:07:32,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 20:07:32,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 20:07:32,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 20:07:32,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 20:07:32,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 20:07:32,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 20:07:32,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 20:07:32,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 20:07:32,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 20:07:32,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 20:07:32,913 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 20:07:32,913 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 20:07:32,913 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 20:07:32,914 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 20:07:32,914 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 20:07:32,914 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 20:07:32,915 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 20:07:32,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 20:07:32,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 20:07:32,916 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 20:07:32,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 20:07:32,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 20:07:32,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 20:07:32,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 20:07:32,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 20:07:32,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 20:07:32,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 20:07:32,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 20:07:32,918 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 20:07:32,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 20:07:32,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 20:07:32,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 20:07:32,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 20:07:32,919 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 20:07:32,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 20:07:32,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 20:07:32,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 20:07:32,921 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 20:07:32,923 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 20:07:32,923 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faad93e560ba524ae1ece04545479d8bfc495d5f [2020-10-19 20:07:33,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 20:07:33,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 20:07:33,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 20:07:33,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 20:07:33,345 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 20:07:33,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2020-10-19 20:07:33,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c6ff822/001b2d2e4d2644479ebdcbd0752955e3/FLAG47aaef072 [2020-10-19 20:07:34,117 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 20:07:34,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2020-10-19 20:07:34,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c6ff822/001b2d2e4d2644479ebdcbd0752955e3/FLAG47aaef072 [2020-10-19 20:07:34,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c6ff822/001b2d2e4d2644479ebdcbd0752955e3 [2020-10-19 20:07:34,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 20:07:34,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 20:07:34,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 20:07:34,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 20:07:34,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 20:07:34,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d0cb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34, skipping insertion in model container [2020-10-19 20:07:34,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 20:07:34,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 20:07:34,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:07:34,760 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 20:07:34,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:07:34,806 INFO L208 MainTranslator]: Completed translation [2020-10-19 20:07:34,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34 WrapperNode [2020-10-19 20:07:34,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 20:07:34,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 20:07:34,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 20:07:34,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 20:07:34,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 20:07:34,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 20:07:34,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 20:07:34,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 20:07:34,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (1/1) ... [2020-10-19 20:07:34,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 20:07:34,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 20:07:34,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 20:07:34,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 20:07:34,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (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 20:07:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 20:07:35,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 20:07:35,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 20:07:35,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 20:07:35,047 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-19 20:07:35,047 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-19 20:07:35,281 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 20:07:35,283 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 20:07:35,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:35 BoogieIcfgContainer [2020-10-19 20:07:35,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 20:07:35,288 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 20:07:35,289 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 20:07:35,294 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 20:07:35,297 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:35,297 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 08:07:34" (1/3) ... [2020-10-19 20:07:35,302 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7bc8777d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:07:35, skipping insertion in model container [2020-10-19 20:07:35,302 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:35,303 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:34" (2/3) ... [2020-10-19 20:07:35,303 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7bc8777d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:07:35, skipping insertion in model container [2020-10-19 20:07:35,304 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:35,304 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:35" (3/3) ... [2020-10-19 20:07:35,307 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2020-10-19 20:07:35,411 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 20:07:35,412 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 20:07:35,412 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 20:07:35,412 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 20:07:35,412 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 20:07:35,413 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 20:07:35,413 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 20:07:35,413 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 20:07:35,442 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-19 20:07:35,490 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:07:35,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:35,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:35,502 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:07:35,503 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:35,503 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 20:07:35,503 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-19 20:07:35,506 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:07:35,507 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:35,507 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:35,508 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:07:35,508 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:35,521 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-19 20:07:35,522 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-19 20:07:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:35,533 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-19 20:07:35,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:35,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475813502] [2020-10-19 20:07:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:35,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:35,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:35,732 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-19 20:07:35,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:35,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865920451] [2020-10-19 20:07:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:35,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:35,746 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:35,748 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:35,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-19 20:07:35,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:35,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900630531] [2020-10-19 20:07:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:35,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:35,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:35,807 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:35,957 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:35,959 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:35,960 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:35,960 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:35,961 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:35,961 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:35,961 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:35,962 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:35,962 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2020-10-19 20:07:35,962 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:35,963 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:35,991 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 20:07:36,010 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 20:07:36,015 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 20:07:36,020 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 20:07:36,025 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 20:07:36,115 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:36,116 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:36,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:36,125 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,138 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:36,138 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:36,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:36,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:36,176 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,202 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:36,202 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:36,216 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:36,216 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:36,247 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:36,253 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:36,253 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,292 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:36,292 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 20:07:36,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:36,325 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:36,358 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:36,361 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:36,362 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:36,362 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:36,362 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:36,362 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:36,362 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,363 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:36,363 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:36,363 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2020-10-19 20:07:36,363 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:36,363 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:36,365 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 20:07:36,368 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 20:07:36,372 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 20:07:36,376 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 20:07:36,381 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 20:07:36,456 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:36,465 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 20:07:36,476 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 20:07:36,480 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:36,480 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:36,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:36,482 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:36,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:36,487 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:36,487 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 20:07:36,494 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 20:07:36,545 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 20:07:36,548 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:36,548 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:36,548 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:36,549 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:36,549 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:36,550 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:36,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:36,553 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:36,605 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 20:07:36,607 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:36,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,608 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:36,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:36,608 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:36,610 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:36,611 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:36,614 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:36,670 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:36,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:36,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:36,673 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:36,673 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:36,674 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:36,674 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:36,677 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:36,734 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 20:07:36,736 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:36,737 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:36,737 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:36,737 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:36,737 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:36,739 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:36,739 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:36,743 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:36,750 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:36,751 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 20:07:36,759 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:36,760 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:36,760 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:36,761 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-19 20:07:36,809 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:36,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 20:07:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:36,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:36,954 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 20:07:36,977 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 20:07:36,979 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-19 20:07:37,150 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-19 20:07:37,151 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 20:07:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 20:07:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-19 20:07:37,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-19 20:07:37,164 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:37,165 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-19 20:07:37,166 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:37,166 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-19 20:07:37,166 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:37,168 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-19 20:07:37,175 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:07:37,187 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-19 20:07:37,189 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-19 20:07:37,191 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-19 20:07:37,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-19 20:07:37,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:37,193 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-19 20:07:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-19 20:07:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-19 20:07:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 20:07:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-19 20:07:37,242 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:07:37,243 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:07:37,243 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 20:07:37,243 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-19 20:07:37,245 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:07:37,245 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:37,245 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:37,247 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:37,247 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:37,248 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-19 20:07:37,248 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-19 20:07:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-19 20:07:37,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:37,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803524941] [2020-10-19 20:07:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:07:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,384 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 20:07:37,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803524941] [2020-10-19 20:07:37,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:07:37,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:07:37,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030023325] [2020-10-19 20:07:37,394 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-19 20:07:37,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:37,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251793214] [2020-10-19 20:07:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 20:07:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:07:37,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251793214] [2020-10-19 20:07:37,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:07:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:07:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498118566] [2020-10-19 20:07:37,470 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:07:37,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 20:07:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 20:07:37,478 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-19 20:07:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:37,601 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-19 20:07:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 20:07:37,603 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-19 20:07:37,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:07:37,608 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-19 20:07:37,609 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-19 20:07:37,609 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-19 20:07:37,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-19 20:07:37,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:37,610 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:07:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-19 20:07:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-19 20:07:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 20:07:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-19 20:07:37,618 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:07:37,618 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:07:37,618 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 20:07:37,619 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-19 20:07:37,620 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:07:37,621 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:37,621 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:37,623 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:37,624 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:07:37,624 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-19 20:07:37,624 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-19 20:07:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-19 20:07:37,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:37,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442939210] [2020-10-19 20:07:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:07:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,770 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 20:07:37,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442939210] [2020-10-19 20:07:37,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777462914] [2020-10-19 20:07:37,772 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 20:07:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:07:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:37,884 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 20:07:37,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:37,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-19 20:07:37,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520006072] [2020-10-19 20:07:37,887 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-19 20:07:37,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:37,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871232047] [2020-10-19 20:07:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:37,905 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:37,918 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:37,922 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:38,224 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:38,224 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:38,224 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:38,224 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:38,225 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:38,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:38,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:38,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:38,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2020-10-19 20:07:38,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:38,226 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:38,228 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 20:07:38,233 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 20:07:38,236 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 20:07:38,240 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 20:07:38,305 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:38,305 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 20:07:38,311 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:38,311 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:38,319 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:38,320 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:38,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:38,379 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:38,384 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:38,384 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:38,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:38,425 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:38,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:38,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:38,469 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:38,469 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:38,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:38,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:39,517 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:39,520 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:39,520 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:39,520 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:39,520 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:39,520 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:39,520 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:39,520 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:39,521 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:39,521 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2020-10-19 20:07:39,521 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:39,521 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:39,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:39,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:39,531 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 20:07:39,540 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 20:07:39,593 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:39,593 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:39,624 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 20:07:39,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:39,627 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:39,628 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:39,628 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:39,628 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:39,629 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:39,630 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:39,633 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:39,693 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 20:07:39,696 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:39,696 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:39,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:39,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:39,697 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:39,698 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:39,698 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:39,701 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:39,754 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:07:39,757 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:39,758 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:39,758 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:39,758 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:39,758 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:39,761 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:39,761 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:39,765 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:39,770 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:39,771 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:39,778 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:39,778 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:39,779 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:39,779 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:39,819 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:07:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 20:07:39,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:07:40,235 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-19 20:07:40,235 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-19 20:07:40,622 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-19 20:07:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-19 20:07:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 20:07:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-19 20:07:40,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-19 20:07:40,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:40,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-19 20:07:40,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:40,627 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-19 20:07:40,629 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:40,629 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-19 20:07:40,640 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:07:40,651 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-19 20:07:40,652 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-19 20:07:40,653 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-19 20:07:40,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-19 20:07:40,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:40,654 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-19 20:07:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-19 20:07:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-19 20:07:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 20:07:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-19 20:07:40,695 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-19 20:07:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 20:07:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 20:07:40,699 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-19 20:07:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:40,855 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-19 20:07:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 20:07:40,856 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-19 20:07:40,867 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:07:40,884 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-19 20:07:40,884 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-19 20:07:40,885 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-19 20:07:40,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-19 20:07:40,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:40,886 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-19 20:07:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-19 20:07:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-19 20:07:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 20:07:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-19 20:07:40,924 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-19 20:07:40,924 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-19 20:07:40,924 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 20:07:40,924 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-19 20:07:40,930 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:07:40,930 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:40,931 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:40,935 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:40,935 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:40,935 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-19 20:07:40,936 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-19 20:07:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-19 20:07:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:40,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296778095] [2020-10-19 20:07:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:41,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 20:07:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:41,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:07:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:41,195 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 20:07:41,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296778095] [2020-10-19 20:07:41,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898119354] [2020-10-19 20:07:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:07:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:41,291 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 20:07:41,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:41,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-19 20:07:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134071590] [2020-10-19 20:07:41,294 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-19 20:07:41,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:41,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447334795] [2020-10-19 20:07:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:41,301 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:41,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:41,308 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:41,448 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:41,448 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:41,448 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:41,448 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:41,448 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:41,448 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:41,449 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:41,449 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:41,449 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration4_Loop [2020-10-19 20:07:41,449 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:41,449 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:41,451 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 20:07:41,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:41,465 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 20:07:41,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:41,517 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:41,518 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:41,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:41,529 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:41,533 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:41,534 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:41,581 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:41,581 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:41,610 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:41,610 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:42,984 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:42,988 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:42,988 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:42,988 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:42,989 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:42,989 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:42,989 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:42,989 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:42,989 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:42,989 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration4_Loop [2020-10-19 20:07:42,989 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:42,989 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:42,991 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 20:07:42,998 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 20:07:43,006 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 20:07:43,010 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 20:07:43,065 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:43,066 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:43,075 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 20:07:43,077 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:43,077 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:43,077 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:43,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:43,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:43,078 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:43,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:43,081 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:43,111 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:43,113 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:43,113 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:43,114 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:43,114 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:43,114 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:43,116 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:43,117 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:43,120 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:43,123 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:43,124 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:43,130 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:43,130 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:43,130 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:43,131 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:07:43,152 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:07:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:43,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:43,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:07:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:43,366 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 20:07:43,367 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 20:07:43,367 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:07:43,702 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-19 20:07:43,704 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 20:07:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:07:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-19 20:07:43,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:07:43,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:43,707 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:07:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:43,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:43,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:07:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:43,902 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 20:07:43,903 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 20:07:43,903 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:07:44,138 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-19 20:07:44,140 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 20:07:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:07:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-19 20:07:44,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:07:44,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:44,143 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:07:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:44,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:44,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:07:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:44,346 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 20:07:44,347 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 20:07:44,348 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:07:44,767 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-19 20:07:44,768 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 20:07:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:07:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-19 20:07:44,770 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:07:44,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:44,775 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-19 20:07:44,776 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:44,776 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-19 20:07:44,782 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:44,783 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-19 20:07:44,805 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-19 20:07:44,835 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-19 20:07:44,836 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-19 20:07:44,840 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-19 20:07:44,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-19 20:07:44,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:44,842 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-19 20:07:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-19 20:07:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-19 20:07:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-19 20:07:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-19 20:07:44,897 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-19 20:07:44,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 20:07:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-19 20:07:44,899 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-19 20:07:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:45,197 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-19 20:07:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:07:45,198 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-19 20:07:45,211 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:45,227 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-19 20:07:45,227 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-19 20:07:45,228 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-19 20:07:45,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-19 20:07:45,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:45,229 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-19 20:07:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-19 20:07:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-19 20:07:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-19 20:07:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-19 20:07:45,261 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-19 20:07:45,261 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-19 20:07:45,261 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 20:07:45,261 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-19 20:07:45,266 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:45,266 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:45,267 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:45,268 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:45,268 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:45,269 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-19 20:07:45,269 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-19 20:07:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-19 20:07:45,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:45,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117651140] [2020-10-19 20:07:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:45,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:07:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:45,397 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 20:07:45,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117651140] [2020-10-19 20:07:45,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132723410] [2020-10-19 20:07:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:07:45,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:45,512 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 20:07:45,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:45,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-19 20:07:45,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828358375] [2020-10-19 20:07:45,513 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:45,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-19 20:07:45,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:45,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729872829] [2020-10-19 20:07:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:45,521 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:45,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:45,527 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:45,574 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:45,574 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:45,574 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:45,574 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:45,574 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:45,574 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,574 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:45,574 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:45,575 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2020-10-19 20:07:45,575 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:45,575 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:45,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:45,582 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 20:07:45,585 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 20:07:45,588 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 20:07:45,597 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 20:07:45,639 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:45,640 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:45,646 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:45,646 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,651 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:45,652 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:45,691 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:45,692 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,697 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:45,697 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,730 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:45,730 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:45,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:45,734 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:45,778 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:45,778 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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:45,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:45,899 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:45,902 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:45,902 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:45,902 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:45,902 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:45,903 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:45,903 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,903 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:45,903 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:45,903 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2020-10-19 20:07:45,903 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:45,903 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:45,904 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 20:07:45,906 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 20:07:45,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:45,911 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 20:07:45,913 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 20:07:45,959 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:45,959 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 20:07:45,963 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 20:07:45,964 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:45,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:45,965 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:45,965 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:45,965 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:45,965 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:45,966 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:45,968 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:45,998 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 20:07:45,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:46,000 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:46,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:46,000 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:46,000 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:46,000 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:46,001 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:46,003 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:46,029 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 20:07:46,031 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:46,031 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:46,032 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:46,032 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:46,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:46,033 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:46,033 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:46,036 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:46,063 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 20:07:46,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:46,066 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:46,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:46,066 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:46,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:46,067 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:46,067 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:46,068 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:46,092 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 20:07:46,094 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:46,094 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:46,095 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:46,095 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:46,095 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:46,096 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:46,096 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:46,099 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:46,104 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:46,104 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:46,111 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:46,111 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:46,111 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:46,112 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:46,153 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:07:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:46,271 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 20:07:46,272 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 20:07:46,272 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:07:46,364 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-19 20:07:46,365 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 20:07:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:07:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:07:46,367 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:07:46,367 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:46,367 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:07:46,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:46,488 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 20:07:46,489 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 20:07:46,489 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:07:46,575 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-19 20:07:46,577 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 20:07:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:07:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:07:46,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:07:46,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:46,580 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:46,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:07:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:46,729 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 20:07:46,730 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 20:07:46,730 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:07:46,853 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-19 20:07:46,853 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 20:07:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:07:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-19 20:07:46,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:07:46,855 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:46,855 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-19 20:07:46,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:46,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-19 20:07:46,857 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:46,857 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-19 20:07:46,868 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:46,879 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-19 20:07:46,880 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-19 20:07:46,880 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-19 20:07:46,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-19 20:07:46,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:46,881 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-19 20:07:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-19 20:07:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-19 20:07:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-19 20:07:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-19 20:07:46,905 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-19 20:07:46,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:46,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 20:07:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-19 20:07:46,906 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-19 20:07:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:47,146 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-19 20:07:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:07:47,147 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-19 20:07:47,156 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:47,167 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-19 20:07:47,168 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-19 20:07:47,168 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-19 20:07:47,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-19 20:07:47,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:47,172 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-19 20:07:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-19 20:07:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-19 20:07:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-19 20:07:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-19 20:07:47,198 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-19 20:07:47,198 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-19 20:07:47,198 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 20:07:47,198 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-19 20:07:47,203 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:47,203 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:47,203 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:47,204 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:47,205 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:47,205 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-19 20:07:47,205 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-19 20:07:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-19 20:07:47,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:47,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632378556] [2020-10-19 20:07:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:47,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:07:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:47,332 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 20:07:47,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632378556] [2020-10-19 20:07:47,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847715622] [2020-10-19 20:07:47,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:47,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:07:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:07:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:07:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:47,411 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 20:07:47,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:47,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-19 20:07:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690176390] [2020-10-19 20:07:47,413 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-19 20:07:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:47,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974950761] [2020-10-19 20:07:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:47,417 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:47,418 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:47,419 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:47,462 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:47,463 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:47,463 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:47,463 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:47,463 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:47,463 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:47,463 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:47,463 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:47,463 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2020-10-19 20:07:47,463 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:47,463 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:47,464 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 20:07:47,467 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 20:07:47,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:47,477 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 20:07:47,522 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:47,522 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:47,527 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:47,528 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 20:07:47,532 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:47,532 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:47,576 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:47,576 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:47,582 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:47,582 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:47,628 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:47,628 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:47,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:47,685 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:54,732 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:54,734 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:54,735 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:54,735 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:54,735 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:54,735 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:54,735 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:54,735 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:54,735 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:54,735 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2020-10-19 20:07:54,735 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:54,736 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:54,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:54,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:54,742 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 20:07:54,751 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 20:07:54,802 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:54,802 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:54,805 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 20:07:54,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:54,807 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:54,807 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:54,807 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:54,807 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:54,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:54,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:54,810 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:54,834 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 20:07:54,835 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:54,835 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:54,835 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:54,835 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:54,835 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:54,836 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:54,836 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:54,837 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:54,859 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 20:07:54,861 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:54,861 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:54,861 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:54,861 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:54,861 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:54,862 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:54,862 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:54,864 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:54,866 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:07:54,866 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:54,870 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:54,870 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:54,870 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:54,870 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:54,894 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:07:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:55,031 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 20:07:55,032 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 20:07:55,032 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-19 20:07:55,097 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-19 20:07:55,097 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 20:07:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:07:55,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:07:55,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:55,099 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:55,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:07:55,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:55,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:55,220 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 20:07:55,220 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 20:07:55,221 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-19 20:07:55,354 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-19 20:07:55,355 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 20:07:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:07:55,357 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:07:55,357 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:55,357 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-19 20:07:55,357 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:55,358 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-19 20:07:55,358 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:55,358 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-19 20:07:55,371 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:55,384 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-19 20:07:55,384 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-19 20:07:55,385 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-19 20:07:55,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-19 20:07:55,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:55,386 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-19 20:07:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-19 20:07:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-19 20:07:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-19 20:07:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-19 20:07:55,420 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-19 20:07:55,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 20:07:55,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-19 20:07:55,421 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-19 20:07:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:55,681 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-19 20:07:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 20:07:55,681 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-19 20:07:55,693 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:55,706 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-19 20:07:55,707 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-19 20:07:55,707 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-19 20:07:55,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-19 20:07:55,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:55,708 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-19 20:07:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-19 20:07:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-19 20:07:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-19 20:07:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-19 20:07:55,739 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:07:55,739 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:07:55,739 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 20:07:55,739 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-19 20:07:55,745 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:55,745 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:55,745 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:55,747 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:55,747 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:55,747 INFO L794 eck$LassoCheckResult]: Stem: 10978#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-19 20:07:55,747 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-19 20:07:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-19 20:07:55,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:55,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974883503] [2020-10-19 20:07:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:55,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:07:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:55,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:55,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:07:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:55,924 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 20:07:55,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974883503] [2020-10-19 20:07:55,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596400908] [2020-10-19 20:07:55,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:55,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:07:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:07:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:07:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:56,038 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 20:07:56,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:56,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-19 20:07:56,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795181697] [2020-10-19 20:07:56,039 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-19 20:07:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:56,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748249354] [2020-10-19 20:07:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:56,043 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:56,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:56,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:56,090 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:56,090 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:56,090 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:56,091 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:56,091 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:56,091 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,091 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:56,091 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:56,091 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2020-10-19 20:07:56,092 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:56,092 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:56,093 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 20:07:56,101 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 20:07:56,103 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 20:07:56,106 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 20:07:56,155 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:56,155 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:56,157 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 20:07:56,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:56,185 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:57,571 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:57,573 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:57,573 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:57,573 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:57,574 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:57,574 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:57,574 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:57,574 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:57,574 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:57,574 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2020-10-19 20:07:57,574 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:57,574 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:57,575 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 20:07:57,576 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 20:07:57,578 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 20:07:57,581 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 20:07:57,635 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:57,635 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:57,639 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 20:07:57,640 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:57,640 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:57,641 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:57,641 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:57,641 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:57,641 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:57,641 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:57,649 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 20:07:57,685 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:07:57,686 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:57,687 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:57,687 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:57,687 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:57,687 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:57,687 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:57,687 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:57,688 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 20:07:57,712 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 20:07:57,713 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:57,714 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:57,714 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:57,714 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:57,714 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:57,714 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:57,714 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:57,716 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:57,739 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:57,740 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:57,741 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:57,741 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:57,741 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:57,741 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:57,742 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:57,742 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:57,745 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:57,747 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:07:57,747 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:57,751 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:57,751 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:57,751 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:57,751 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:07:57,772 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:07:57,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:57,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:57,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:57,938 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 20:07:57,938 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 20:07:57,938 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-19 20:07:58,009 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-19 20:07:58,010 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 20:07:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:07:58,011 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:07:58,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:58,012 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:07:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:58,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:58,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:58,170 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 20:07:58,170 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 20:07:58,171 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-19 20:07:58,276 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-19 20:07:58,277 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 20:07:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:07:58,278 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:07:58,279 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:58,279 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:07:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:07:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:58,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:58,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:07:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:07:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:58,416 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 20:07:58,417 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 20:07:58,417 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-19 20:07:58,510 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-19 20:07:58,511 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 20:07:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:07:58,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:07:58,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:58,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-19 20:07:58,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:58,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-19 20:07:58,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:58,515 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-19 20:07:58,527 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:58,539 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-19 20:07:58,539 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-19 20:07:58,540 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-19 20:07:58,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-19 20:07:58,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:58,541 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:07:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-19 20:07:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-19 20:07:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-19 20:07:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-19 20:07:58,570 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:07:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 20:07:58,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-19 20:07:58,571 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-19 20:07:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:58,888 INFO L93 Difference]: Finished difference Result 777 states and 1127 transitions. [2020-10-19 20:07:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 20:07:58,889 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1127 transitions. [2020-10-19 20:07:58,898 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:58,911 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1127 transitions. [2020-10-19 20:07:58,911 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-19 20:07:58,913 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-19 20:07:58,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1127 transitions. [2020-10-19 20:07:58,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:58,913 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1127 transitions. [2020-10-19 20:07:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1127 transitions. [2020-10-19 20:07:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2020-10-19 20:07:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-19 20:07:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-19 20:07:58,938 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-19 20:07:58,938 INFO L594 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-19 20:07:58,939 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 20:07:58,939 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 736 states and 1081 transitions. [2020-10-19 20:07:58,945 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:07:58,945 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:58,946 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:58,950 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:58,951 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:07:58,952 INFO L794 eck$LassoCheckResult]: Stem: 16560#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16553#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 16554#L27 call main_#t~ret9 := fibo(main_~x~0);< 16583#fiboENTRY ~n := #in~n; 16663#L8 assume !(~n < 1); 16662#L10 assume !(1 == ~n); 16658#L13 call #t~ret7 := fibo(~n - 1);< 16661#fiboENTRY ~n := #in~n; 16660#L8 assume !(~n < 1); 16659#L10 assume !(1 == ~n); 16654#L13 call #t~ret7 := fibo(~n - 1);< 16657#fiboENTRY ~n := #in~n; 16656#L8 assume !(~n < 1); 16655#L10 assume !(1 == ~n); 16647#L13 call #t~ret7 := fibo(~n - 1);< 16653#fiboENTRY ~n := #in~n; 16651#L8 assume !(~n < 1); 16649#L10 assume !(1 == ~n); 16635#L13 call #t~ret7 := fibo(~n - 1);< 16640#fiboENTRY ~n := #in~n; 16645#L8 assume !(~n < 1); 16643#L10 assume !(1 == ~n); 16634#L13 call #t~ret7 := fibo(~n - 1);< 16640#fiboENTRY ~n := #in~n; 16646#L8 assume !(~n < 1); 16644#L10 assume 1 == ~n;#res := 1; 16641#fiboFINAL assume true; 16633#fiboEXIT >#35#return; 16630#L13-1 call #t~ret8 := fibo(~n - 2);< 16629#fiboENTRY ~n := #in~n; 16631#L8 assume !(~n < 1); 16805#L10 assume !(1 == ~n); 16626#L13 call #t~ret7 := fibo(~n - 1);< 16637#fiboENTRY ~n := #in~n; 16652#L8 assume !(~n < 1); 17176#L10 assume !(1 == ~n); 16601#L13 call #t~ret7 := fibo(~n - 1);< 17214#fiboENTRY ~n := #in~n; 17223#L8 assume !(~n < 1); 17222#L10 assume 1 == ~n;#res := 1; 17219#fiboFINAL assume true; 17213#fiboEXIT >#35#return; 16670#L13-1 call #t~ret8 := fibo(~n - 2);< 16949#fiboENTRY ~n := #in~n; 17179#L8 assume ~n < 1;#res := 0; 17177#fiboFINAL assume true; 16669#fiboEXIT >#37#return; 16674#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16827#fiboFINAL assume true; 16806#fiboEXIT >#35#return; 16752#L13-1 call #t~ret8 := fibo(~n - 2);< 16760#fiboENTRY ~n := #in~n; 16817#L8 assume !(~n < 1); 16812#L10 assume !(1 == ~n); 16814#L13 call #t~ret7 := fibo(~n - 1);< 16839#fiboENTRY ~n := #in~n; 16905#L8 assume !(~n < 1); 17075#L10 assume !(1 == ~n); 16979#L13 call #t~ret7 := fibo(~n - 1);< 16983#fiboENTRY ~n := #in~n; 16990#L8 assume !(~n < 1); 17002#L10 assume !(1 == ~n); 16981#L13 [2020-10-19 20:07:58,953 INFO L796 eck$LassoCheckResult]: Loop: 16981#L13 call #t~ret7 := fibo(~n - 1);< 16983#fiboENTRY ~n := #in~n; 16990#L8 assume !(~n < 1); 17002#L10 assume !(1 == ~n); 16981#L13 [2020-10-19 20:07:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-19 20:07:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:58,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590943090] [2020-10-19 20:07:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 20:07:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:59,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-19 20:07:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:59,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:59,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:07:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:59,112 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 20:07:59,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590943090] [2020-10-19 20:07:59,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697156121] [2020-10-19 20:07:59,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:59,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-19 20:07:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:07:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:07:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:59,306 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 20:07:59,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:59,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-19 20:07:59,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114703173] [2020-10-19 20:07:59,308 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-19 20:07:59,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:59,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664790258] [2020-10-19 20:07:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:59,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:59,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:59,315 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:59,360 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:59,360 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:59,360 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:59,361 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:59,361 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:59,361 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,361 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:59,361 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:59,361 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2020-10-19 20:07:59,361 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:59,362 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:59,363 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 20:07:59,364 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 20:07:59,366 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 20:07:59,375 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 20:07:59,433 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:59,433 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:59,442 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,442 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,465 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:59,472 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,472 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,500 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 63 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 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 20:07:59,527 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:59,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:00,883 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:00,884 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:00,884 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:00,885 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:00,885 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:00,885 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:00,885 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,885 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:00,885 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:00,885 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2020-10-19 20:08:00,885 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:00,886 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:00,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:00,888 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 20:08:00,889 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 20:08:00,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:00,953 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:00,953 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,956 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 20:08:00,957 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,957 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,957 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,958 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,958 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,959 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,960 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,982 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 20:08:00,983 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,983 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,983 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,983 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,983 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,985 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,986 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:01,008 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:01,009 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:01,009 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:01,010 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:01,010 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:01,010 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:01,010 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:01,011 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:01,013 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:01,015 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:01,015 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:01,018 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:01,018 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:01,018 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:01,018 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:01,039 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:01,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,207 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 20:08:01,208 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 20:08:01,208 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-19 20:08:01,276 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 755 states and 1101 transitions. Complement of second has 18 states. [2020-10-19 20:08:01,277 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 20:08:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:01,278 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:08:01,279 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,279 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:01,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,565 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 20:08:01,566 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 20:08:01,566 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-19 20:08:01,678 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 940 states and 1320 transitions. Complement of second has 22 states. [2020-10-19 20:08:01,679 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 20:08:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:01,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:08:01,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,680 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:01,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,827 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 20:08:01,827 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 20:08:01,827 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-19 20:08:01,914 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 983 states and 1401 transitions. Complement of second has 27 states. [2020-10-19 20:08:01,915 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 20:08:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:08:01,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:08:01,918 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,918 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-19 20:08:01,919 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,919 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-19 20:08:01,919 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,920 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 983 states and 1401 transitions. [2020-10-19 20:08:01,929 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:01,938 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 983 states to 736 states and 1081 transitions. [2020-10-19 20:08:01,939 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 231 [2020-10-19 20:08:01,940 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 267 [2020-10-19 20:08:01,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 736 states and 1081 transitions. [2020-10-19 20:08:01,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:01,940 INFO L691 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-19 20:08:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states and 1081 transitions. [2020-10-19 20:08:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-10-19 20:08:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-19 20:08:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-19 20:08:01,967 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-19 20:08:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-19 20:08:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-19 20:08:01,968 INFO L87 Difference]: Start difference. First operand 736 states and 1081 transitions. Second operand 23 states. [2020-10-19 20:08:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:02,537 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2020-10-19 20:08:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-19 20:08:02,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 590 transitions. [2020-10-19 20:08:02,544 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:02,549 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 507 transitions. [2020-10-19 20:08:02,549 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-10-19 20:08:02,550 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-10-19 20:08:02,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 507 transitions. [2020-10-19 20:08:02,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:02,550 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 507 transitions. [2020-10-19 20:08:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 507 transitions. [2020-10-19 20:08:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-10-19 20:08:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-19 20:08:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-19 20:08:02,561 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-19 20:08:02,561 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-19 20:08:02,561 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 20:08:02,561 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 425 transitions. [2020-10-19 20:08:02,563 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:02,564 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:02,564 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:02,565 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:08:02,565 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:02,565 INFO L794 eck$LassoCheckResult]: Stem: 22131#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22144#fiboENTRY ~n := #in~n; 22237#L8 assume !(~n < 1); 22235#L10 assume !(1 == ~n); 22215#L13 call #t~ret7 := fibo(~n - 1);< 22230#fiboENTRY ~n := #in~n; 22224#L8 assume !(~n < 1); 22221#L10 assume !(1 == ~n); 22217#L13 call #t~ret7 := fibo(~n - 1);< 22218#fiboENTRY ~n := #in~n; 22272#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22232#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22241#L8 assume !(~n < 1); 22240#L10 assume !(1 == ~n); 22227#L13 call #t~ret7 := fibo(~n - 1);< 22239#fiboENTRY ~n := #in~n; 22257#L8 assume !(~n < 1); 22254#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22277#fiboENTRY ~n := #in~n; 22410#L8 assume !(~n < 1); 22409#L10 assume 1 == ~n;#res := 1; 22408#fiboFINAL assume true; 22407#fiboEXIT >#35#return; 22110#L13-1 call #t~ret8 := fibo(~n - 2);< 22113#fiboENTRY ~n := #in~n; 22418#L8 assume ~n < 1;#res := 0; 22416#fiboFINAL assume true; 22414#fiboEXIT >#37#return; 22412#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22411#fiboFINAL assume true; 22297#fiboEXIT >#35#return; 22288#L13-1 call #t~ret8 := fibo(~n - 2);< 22290#fiboENTRY ~n := #in~n; 22349#L8 assume !(~n < 1); 22312#L10 assume 1 == ~n;#res := 1; 22308#fiboFINAL assume true; 22287#fiboEXIT >#37#return; 22283#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22281#fiboFINAL assume true; 22280#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22248#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22136#L13 call #t~ret7 := fibo(~n - 1);< 22126#fiboENTRY ~n := #in~n; 22204#L8 assume !(~n < 1); 22205#L10 assume !(1 == ~n); 22172#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22170#L13 [2020-10-19 20:08:02,566 INFO L796 eck$LassoCheckResult]: Loop: 22170#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22170#L13 [2020-10-19 20:08:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash 817988141, now seen corresponding path program 4 times [2020-10-19 20:08:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:02,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660585108] [2020-10-19 20:08:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 20:08:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-19 20:08:02,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660585108] [2020-10-19 20:08:02,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167585331] [2020-10-19 20:08:02,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:02,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 20:08:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-19 20:08:02,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:02,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-19 20:08:02,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174177525] [2020-10-19 20:08:02,889 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-19 20:08:02,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:02,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483797336] [2020-10-19 20:08:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:02,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:02,894 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:02,895 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:02,933 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:02,933 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:02,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:02,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:02,933 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:02,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,934 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:02,934 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:02,934 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2020-10-19 20:08:02,934 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:02,934 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:02,935 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 20:08:02,937 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 20:08:02,940 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 20:08:02,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:03,004 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:03,006 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:03,011 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:03,011 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:03,014 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:03,015 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:03,039 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:03,039 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:03,042 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:03,042 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:03,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:03,065 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:03,068 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:03,068 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 72 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:03,093 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:03,093 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:03,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:03,120 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:09,992 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:09,994 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:09,994 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:09,994 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:09,994 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:09,994 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:09,994 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:09,995 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:09,995 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:09,995 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2020-10-19 20:08:09,995 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:09,995 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:09,996 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 20:08:09,998 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 20:08:09,999 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 20:08:10,009 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 20:08:10,062 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:10,062 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:10,065 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 20:08:10,066 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:10,066 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:10,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:10,067 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:10,067 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:10,067 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:10,067 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:10,068 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:10,091 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 20:08:10,093 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:10,093 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:10,093 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:10,093 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:10,093 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:10,094 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:10,094 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:10,095 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:10,125 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 20:08:10,126 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:10,126 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:10,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:10,127 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:10,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:10,128 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:10,128 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:10,130 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:10,132 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:10,133 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:10,135 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:10,135 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:10,135 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:10,135 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:10,157 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,330 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 20:08:10,330 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 20:08:10,330 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-19 20:08:10,390 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 337 states and 445 transitions. Complement of second has 18 states. [2020-10-19 20:08:10,391 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 20:08:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:10,391 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-19 20:08:10,392 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:10,392 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,546 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 20:08:10,546 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 20:08:10,546 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-19 20:08:10,631 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 343 states and 451 transitions. Complement of second has 17 states. [2020-10-19 20:08:10,632 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 20:08:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:10,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-19 20:08:10,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:10,633 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:10,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,818 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 20:08:10,819 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 20:08:10,819 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-19 20:08:10,910 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 424 states and 555 transitions. Complement of second has 27 states. [2020-10-19 20:08:10,911 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 20:08:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:08:10,911 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-19 20:08:10,912 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:10,912 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-19 20:08:10,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:10,913 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-19 20:08:10,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:10,914 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 555 transitions. [2020-10-19 20:08:10,924 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:10,929 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 435 transitions. [2020-10-19 20:08:10,930 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-10-19 20:08:10,930 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-19 20:08:10,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 435 transitions. [2020-10-19 20:08:10,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:10,936 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 435 transitions. [2020-10-19 20:08:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 435 transitions. [2020-10-19 20:08:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-10-19 20:08:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-19 20:08:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-19 20:08:10,950 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-19 20:08:10,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-19 20:08:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-19 20:08:10,952 INFO L87 Difference]: Start difference. First operand 318 states and 425 transitions. Second operand 20 states. [2020-10-19 20:08:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:11,519 INFO L93 Difference]: Finished difference Result 462 states and 631 transitions. [2020-10-19 20:08:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-19 20:08:11,519 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 631 transitions. [2020-10-19 20:08:11,526 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:11,535 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 451 states and 614 transitions. [2020-10-19 20:08:11,536 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 204 [2020-10-19 20:08:11,537 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 204 [2020-10-19 20:08:11,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 451 states and 614 transitions. [2020-10-19 20:08:11,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:11,537 INFO L691 BuchiCegarLoop]: Abstraction has 451 states and 614 transitions. [2020-10-19 20:08:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states and 614 transitions. [2020-10-19 20:08:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 384. [2020-10-19 20:08:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-19 20:08:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-19 20:08:11,555 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-19 20:08:11,556 INFO L594 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-19 20:08:11,556 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 20:08:11,556 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 384 states and 515 transitions. [2020-10-19 20:08:11,561 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:11,561 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:11,561 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:11,572 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:08:11,572 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:11,573 INFO L794 eck$LassoCheckResult]: Stem: 25398#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25375#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 25376#L27 call main_#t~ret9 := fibo(main_~x~0);< 25405#fiboENTRY ~n := #in~n; 25583#L8 assume !(~n < 1); 25507#L10 assume !(1 == ~n); 25494#L13 call #t~ret7 := fibo(~n - 1);< 25505#fiboENTRY ~n := #in~n; 25503#L8 assume !(~n < 1); 25501#L10 assume !(1 == ~n); 25497#L13 call #t~ret7 := fibo(~n - 1);< 25498#fiboENTRY ~n := #in~n; 25546#L8 assume !(~n < 1); 25532#L10 assume !(1 == ~n); 25522#L13 call #t~ret7 := fibo(~n - 1);< 25527#fiboENTRY ~n := #in~n; 25531#L8 assume !(~n < 1); 25526#L10 assume !(1 == ~n); 25518#L13 call #t~ret7 := fibo(~n - 1);< 25525#fiboENTRY ~n := #in~n; 25554#L8 assume !(~n < 1); 25552#L10 assume !(1 == ~n); 25534#L13 call #t~ret7 := fibo(~n - 1);< 25548#fiboENTRY ~n := #in~n; 25747#L8 assume !(~n < 1); 25746#L10 assume !(1 == ~n); 25392#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25635#fiboENTRY ~n := #in~n; 25742#L8 assume !(~n < 1); 25424#L10 assume 1 == ~n;#res := 1; 25425#fiboFINAL assume true; 25719#fiboEXIT >#35#return; 25390#L13-1 call #t~ret8 := fibo(~n - 2);< 25393#fiboENTRY ~n := #in~n; 25756#L8 assume ~n < 1;#res := 0; 25755#fiboFINAL assume true; 25754#fiboEXIT >#37#return; 25380#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25753#fiboFINAL assume true; 25752#fiboEXIT >#35#return; 25378#L13-1 call #t~ret8 := fibo(~n - 2);< 25645#fiboENTRY ~n := #in~n; 25748#L8 assume !(~n < 1); 25672#L10 assume 1 == ~n;#res := 1; 25661#fiboFINAL assume true; 25642#fiboEXIT >#37#return; 25641#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25634#fiboFINAL assume true; 25610#fiboEXIT >#35#return; 25379#L13-1 call #t~ret8 := fibo(~n - 2);< 25543#fiboENTRY ~n := #in~n; 25662#L8 assume !(~n < 1); 25660#L10 assume !(1 == ~n); 25630#L13 call #t~ret7 := fibo(~n - 1);< 25657#fiboENTRY ~n := #in~n; 25666#L8 assume !(~n < 1); 25758#L10 assume !(1 == ~n); 25453#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-10-19 20:08:11,573 INFO L796 eck$LassoCheckResult]: Loop: 25454#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-10-19 20:08:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1637456312, now seen corresponding path program 5 times [2020-10-19 20:08:11,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:11,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633633085] [2020-10-19 20:08:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-19 20:08:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:12,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:12,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:12,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-19 20:08:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633633085] [2020-10-19 20:08:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41466164] [2020-10-19 20:08:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:12,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-19 20:08:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-19 20:08:12,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:12,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2020-10-19 20:08:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516757094] [2020-10-19 20:08:12,170 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 7 times [2020-10-19 20:08:12,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:12,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929442052] [2020-10-19 20:08:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,176 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,178 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:12,218 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:12,218 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:12,218 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:12,218 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:12,218 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:12,219 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,219 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:12,219 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:12,219 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2020-10-19 20:08:12,220 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:12,220 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:12,220 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 20:08:12,223 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 20:08:12,234 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 20:08:12,236 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 20:08:12,285 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:12,287 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:12,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,290 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,295 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:12,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,329 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 81 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:12,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:12,358 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:19,281 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:19,283 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:19,283 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:19,283 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:19,283 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:19,283 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:19,283 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:19,283 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:19,283 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:19,283 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2020-10-19 20:08:19,283 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:19,283 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:19,284 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 20:08:19,286 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 20:08:19,289 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 20:08:19,297 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 20:08:19,354 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:19,354 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:19,364 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 20:08:19,365 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:19,365 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:19,365 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:19,365 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:19,365 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:19,366 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:19,366 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:19,367 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:19,389 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 20:08:19,390 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:19,391 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:19,391 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:19,391 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:19,391 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:19,391 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:19,391 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:19,392 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:19,415 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:19,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:19,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:19,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:19,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:19,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:19,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:19,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:19,419 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:19,422 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:19,422 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:19,428 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:19,428 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:19,428 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:19,429 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:19,449 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,619 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 20:08:19,620 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 20:08:19,620 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-19 20:08:19,680 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 406 states and 538 transitions. Complement of second has 18 states. [2020-10-19 20:08:19,681 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 20:08:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:19,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-19 20:08:19,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,682 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,878 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 20:08:19,879 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 20:08:19,879 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-19 20:08:19,978 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 412 states and 544 transitions. Complement of second has 17 states. [2020-10-19 20:08:19,979 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 20:08:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:19,982 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-19 20:08:19,982 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,982 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-19 20:08:20,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:20,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:20,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:20,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:20,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:20,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:20,204 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 20:08:20,204 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 20:08:20,205 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-19 20:08:20,300 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 507 states and 666 transitions. Complement of second has 27 states. [2020-10-19 20:08:20,301 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 20:08:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:08:20,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-19 20:08:20,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:20,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2020-10-19 20:08:20,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:20,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2020-10-19 20:08:20,309 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:20,309 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 666 transitions. [2020-10-19 20:08:20,314 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:20,320 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 388 states and 520 transitions. [2020-10-19 20:08:20,321 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2020-10-19 20:08:20,321 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2020-10-19 20:08:20,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 388 states and 520 transitions. [2020-10-19 20:08:20,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:20,322 INFO L691 BuchiCegarLoop]: Abstraction has 388 states and 520 transitions. [2020-10-19 20:08:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states and 520 transitions. [2020-10-19 20:08:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2020-10-19 20:08:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-19 20:08:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-19 20:08:20,339 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-19 20:08:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 20:08:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-19 20:08:20,340 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand 24 states. [2020-10-19 20:08:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:20,953 INFO L93 Difference]: Finished difference Result 542 states and 774 transitions. [2020-10-19 20:08:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-19 20:08:20,954 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 542 states and 774 transitions. [2020-10-19 20:08:20,961 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:20,961 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 542 states to 0 states and 0 transitions. [2020-10-19 20:08:20,962 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:08:20,962 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:08:20,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:08:20,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:08:20,962 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:20,962 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:20,963 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:20,963 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-19 20:08:20,963 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 20:08:20,963 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:20,963 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 20:08:20,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 08:08:20 BoogieIcfgContainer [2020-10-19 20:08:20,971 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 20:08:20,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 20:08:20,972 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 20:08:20,972 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 20:08:20,973 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:35" (3/4) ... [2020-10-19 20:08:20,978 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 20:08:20,978 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 20:08:20,982 INFO L168 Benchmark]: Toolchain (without parser) took 46502.52 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 364.9 MB). Free memory was 951.9 MB in the beginning and 1.0 GB in the end (delta: -61.5 MB). Peak memory consumption was 303.4 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:20,983 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:20,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.93 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:20,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 119.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 941.2 MB in the beginning and 1.1 GB in the end (delta: -164.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:20,990 INFO L168 Benchmark]: Boogie Preprocessor took 29.02 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:20,990 INFO L168 Benchmark]: RCFGBuilder took 329.95 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:20,991 INFO L168 Benchmark]: BuchiAutomizer took 45682.86 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 255.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 71.8 MB). Peak memory consumption was 327.2 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:20,992 INFO L168 Benchmark]: Witness Printer took 6.64 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:20,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 318.93 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.2 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 119.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 941.2 MB in the beginning and 1.1 GB in the end (delta: -164.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.02 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 329.95 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 45682.86 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 255.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 71.8 MB). Peak memory consumption was 327.2 MB. Max. memory is 11.5 GB. * Witness Printer took 6.64 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 18 terminating modules (9 trivial, 3 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 45.5s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 34.1s. Construction of modules took 2.6s. Büchi inclusion checks took 7.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 17. Automata minimization 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 453 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 736 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 407 SDtfs, 1132 SDslu, 735 SDs, 0 SdLazy, 2447 SolverSat, 772 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT8 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 26ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 9 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 26.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...