./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675300a4b632e073b31d1e86ab5660e0c5ab887b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:04:24,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:04:24,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:04:24,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:04:24,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:04:24,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:04:24,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:04:24,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:04:24,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:04:24,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:04:24,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:04:24,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:04:24,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:04:24,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:04:24,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:04:24,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:04:24,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:04:24,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:04:24,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:04:24,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:04:24,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:04:24,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:04:24,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:04:24,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:04:24,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:04:24,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:04:24,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:04:24,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:04:24,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:04:24,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:04:24,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:04:24,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:04:24,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:04:24,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:04:24,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:04:24,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:04:24,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:04:24,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:04:24,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:04:24,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:04:24,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:04:24,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 20:04:24,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:04:24,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:04:24,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:04:24,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:04:24,837 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:04:24,837 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 20:04:24,837 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 20:04:24,838 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 20:04:24,838 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 20:04:24,839 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 20:04:24,840 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 20:04:24,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:04:24,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:04:24,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:04:24,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:04:24,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:04:24,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:04:24,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 20:04:24,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 20:04:24,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 20:04:24,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:04:24,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:04:24,843 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 20:04:24,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:04:24,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 20:04:24,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:04:24,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:04:24,845 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 20:04:24,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:04:24,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:04:24,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:04:24,848 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 20:04:24,850 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 20:04:24,850 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675300a4b632e073b31d1e86ab5660e0c5ab887b [2020-11-29 20:04:25,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:04:25,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:04:25,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:04:25,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:04:25,286 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:04:25,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02.c [2020-11-29 20:04:25,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/data/27aca90ed/ff642337963a4305830ee95f48e6cd00/FLAG2a8a4b613 [2020-11-29 20:04:25,905 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:04:25,906 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/sv-benchmarks/c/recursive/Fibonacci02.c [2020-11-29 20:04:25,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/data/27aca90ed/ff642337963a4305830ee95f48e6cd00/FLAG2a8a4b613 [2020-11-29 20:04:26,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/data/27aca90ed/ff642337963a4305830ee95f48e6cd00 [2020-11-29 20:04:26,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:04:26,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:04:26,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:04:26,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:04:26,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:04:26,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261db6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26, skipping insertion in model container [2020-11-29 20:04:26,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:04:26,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:04:26,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:04:26,518 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:04:26,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:04:26,553 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:04:26,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26 WrapperNode [2020-11-29 20:04:26,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:04:26,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:04:26,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:04:26,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:04:26,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:04:26,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:04:26,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:04:26,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:04:26,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... [2020-11-29 20:04:26,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:04:26,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:04:26,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:04:26,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:04:26,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-11-29 20:04:26,738 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-11-29 20:04:26,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:04:26,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:04:26,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:04:26,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:04:27,053 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:04:27,054 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 20:04:27,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:04:27 BoogieIcfgContainer [2020-11-29 20:04:27,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:04:27,057 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 20:04:27,057 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 20:04:27,061 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 20:04:27,062 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 20:04:27,062 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 08:04:26" (1/3) ... [2020-11-29 20:04:27,064 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7d456a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 08:04:27, skipping insertion in model container [2020-11-29 20:04:27,064 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 20:04:27,064 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:26" (2/3) ... [2020-11-29 20:04:27,065 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7d456a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 08:04:27, skipping insertion in model container [2020-11-29 20:04:27,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 20:04:27,065 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:04:27" (3/3) ... [2020-11-29 20:04:27,067 INFO L373 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2020-11-29 20:04:27,192 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 20:04:27,192 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 20:04:27,192 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 20:04:27,192 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:04:27,192 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:04:27,193 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 20:04:27,193 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:04:27,193 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 20:04:27,209 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2020-11-29 20:04:27,238 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 20:04:27,242 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:27,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:27,251 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 20:04:27,251 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:04:27,252 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 20:04:27,252 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2020-11-29 20:04:27,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 20:04:27,259 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:27,259 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:27,259 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 20:04:27,260 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:04:27,266 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 9#L29true call main_#t~ret9 := fibonacci(main_~x~0);< 18#fibonacciENTRYtrue [2020-11-29 20:04:27,269 INFO L796 eck$LassoCheckResult]: Loop: 18#fibonacciENTRYtrue ~n := #in~n; 8#L17true assume !(~n < 1); 12#L19true assume !(1 == ~n); 16#L22true call #t~ret7 := fibonacci(~n - 1);< 18#fibonacciENTRYtrue [2020-11-29 20:04:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash 42783, now seen corresponding path program 1 times [2020-11-29 20:04:27,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:27,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445215113] [2020-11-29 20:04:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:27,393 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:27,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:27,440 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 1 times [2020-11-29 20:04:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:27,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219066136] [2020-11-29 20:04:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:27,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:27,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:27,459 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash 856297401, now seen corresponding path program 1 times [2020-11-29 20:04:27,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:27,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196864511] [2020-11-29 20:04:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:27,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:27,540 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:27,547 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:27,745 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:27,746 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:27,746 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:27,746 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:27,746 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:27,747 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:27,747 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:27,747 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:27,747 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2020-11-29 20:04:27,747 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:27,748 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:27,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:27,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:27,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:27,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:27,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:27,924 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:27,924 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:27,935 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:27,935 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 [2020-11-29 20:04:27,946 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:27,947 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:28,023 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:28,024 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:28,027 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:28,027 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:28,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:28,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:28,065 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:28,065 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:28,097 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:28,097 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:28,100 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:28,100 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:28,130 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:28,131 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:28,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:28,169 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:28,259 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:28,265 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:28,265 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:28,265 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:28,265 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:28,266 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:28,266 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:28,266 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:28,266 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:28,266 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2020-11-29 20:04:28,266 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:28,266 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:28,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:28,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:28,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:28,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:28,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:28,410 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:28,415 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:28,421 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 [2020-11-29 20:04:28,427 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:28,427 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:28,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:28,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:28,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:28,431 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:28,431 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 [2020-11-29 20:04:28,434 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:28,490 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 [2020-11-29 20:04:28,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:28,493 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:28,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:28,493 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:28,493 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:28,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:28,495 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:28,501 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:28,550 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 [2020-11-29 20:04:28,552 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:28,552 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:28,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:28,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:28,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:28,555 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:28,555 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:28,559 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:28,593 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 [2020-11-29 20:04:28,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:28,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:28,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:28,596 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:28,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:28,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:28,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:28,598 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:28,632 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 [2020-11-29 20:04:28,633 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:28,634 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:28,634 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:28,634 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:28,634 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:28,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:28,636 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:28,646 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:28,691 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:04:28,691 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:28,698 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:28,698 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:28,698 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:28,699 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:28,745 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:28,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:04:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:28,925 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 [2020-11-29 20:04:28,927 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2020-11-29 20:04:29,176 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states.. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 12 states. [2020-11-29 20:04:29,179 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 [2020-11-29 20:04:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 20:04:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 20:04:29,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 20:04:29,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:29,189 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 20:04:29,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:29,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 20:04:29,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:29,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2020-11-29 20:04:29,202 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 20:04:29,209 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2020-11-29 20:04:29,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 20:04:29,210 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-29 20:04:29,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-11-29 20:04:29,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:29,211 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-11-29 20:04:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-11-29 20:04:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-11-29 20:04:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 20:04:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-11-29 20:04:29,244 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 20:04:29,244 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 20:04:29,245 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 20:04:29,245 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-11-29 20:04:29,246 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 20:04:29,246 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:29,246 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:29,248 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:29,248 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:29,248 INFO L794 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 123#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 138#fibonacciENTRY ~n := #in~n; 136#L17 assume !(~n < 1); 137#L19 assume !(1 == ~n); 125#L22 call #t~ret7 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 133#L17 assume ~n < 1;#res := 0; 134#fibonacciFINAL assume true; 124#fibonacciEXIT >#31#return; 126#L22-1 [2020-11-29 20:04:29,249 INFO L796 eck$LassoCheckResult]: Loop: 126#L22-1 call #t~ret8 := fibonacci(~n - 2);< 131#fibonacciENTRY ~n := #in~n; 141#L17 assume !(~n < 1); 140#L19 assume !(1 == ~n); 128#L22 call #t~ret7 := fibonacci(~n - 1);< 131#fibonacciENTRY ~n := #in~n; 141#L17 assume ~n < 1;#res := 0; 129#fibonacciFINAL assume true; 139#fibonacciEXIT >#31#return; 126#L22-1 [2020-11-29 20:04:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2073663503, now seen corresponding path program 1 times [2020-11-29 20:04:29,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:29,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785755836] [2020-11-29 20:04:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:04:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:04:29,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785755836] [2020-11-29 20:04:29,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:04:29,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:04:29,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203104534] [2020-11-29 20:04:29,388 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:29,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1606275375, now seen corresponding path program 1 times [2020-11-29 20:04:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:29,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010112994] [2020-11-29 20:04:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:04:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:04:29,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010112994] [2020-11-29 20:04:29,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:04:29,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:04:29,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515974422] [2020-11-29 20:04:29,476 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 20:04:29,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:04:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:04:29,483 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-11-29 20:04:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:29,609 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-11-29 20:04:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:04:29,618 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-11-29 20:04:29,621 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 20:04:29,622 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-11-29 20:04:29,623 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-11-29 20:04:29,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-11-29 20:04:29,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-11-29 20:04:29,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:29,624 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 20:04:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-11-29 20:04:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 20:04:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 20:04:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-11-29 20:04:29,632 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 20:04:29,633 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 20:04:29,633 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 20:04:29,634 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-11-29 20:04:29,635 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 20:04:29,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:29,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:29,638 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:29,639 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:29,639 INFO L794 eck$LassoCheckResult]: Stem: 203#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 195#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 196#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 212#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 211#L19 assume !(1 == ~n); 201#L22 call #t~ret7 := fibonacci(~n - 1);< 205#fibonacciENTRY ~n := #in~n; 207#L17 assume !(~n < 1); 218#L19 assume 1 == ~n;#res := 1; 217#fibonacciFINAL assume true; 216#fibonacciEXIT >#31#return; 199#L22-1 [2020-11-29 20:04:29,640 INFO L796 eck$LassoCheckResult]: Loop: 199#L22-1 call #t~ret8 := fibonacci(~n - 2);< 204#fibonacciENTRY ~n := #in~n; 206#L17 assume !(~n < 1); 210#L19 assume !(1 == ~n); 198#L22 call #t~ret7 := fibonacci(~n - 1);< 204#fibonacciENTRY ~n := #in~n; 206#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 213#fibonacciFINAL assume true; 214#fibonacciEXIT >#31#return; 199#L22-1 [2020-11-29 20:04:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash -140916419, now seen corresponding path program 1 times [2020-11-29 20:04:29,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:29,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069606961] [2020-11-29 20:04:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:04:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069606961] [2020-11-29 20:04:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930691241] [2020-11-29 20:04:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:04:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:29,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:29,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 20:04:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98137936] [2020-11-29 20:04:29,856 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1745046499, now seen corresponding path program 1 times [2020-11-29 20:04:29,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:29,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80794667] [2020-11-29 20:04:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:29,869 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:29,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:29,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:30,063 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:30,063 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:30,063 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:30,063 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:30,063 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:30,064 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:30,064 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:30,064 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:30,064 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2020-11-29 20:04:30,064 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:30,064 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:30,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:30,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:30,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:30,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:30,197 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:30,198 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:30,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:30,206 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:30,297 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:30,297 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:31,065 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:31,067 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:31,068 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:31,068 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:31,068 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:31,068 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:31,068 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:31,068 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:31,068 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:31,068 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2020-11-29 20:04:31,068 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:31,068 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:31,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:31,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:31,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:31,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:31,182 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:31,182 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:31,194 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 [2020-11-29 20:04:31,196 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:31,197 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:31,197 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:31,197 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:31,197 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:31,200 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:31,201 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:31,205 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:31,212 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:04:31,212 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:31,218 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:31,218 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:31,218 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:31,218 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:31,263 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:04:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:31,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:04:31,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:31,561 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 [2020-11-29 20:04:31,562 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 8 states. [2020-11-29 20:04:31,996 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 8 states. Result 135 states and 183 transitions. Complement of second has 36 states. [2020-11-29 20:04:31,997 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 [2020-11-29 20:04:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 20:04:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-11-29 20:04:31,999 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2020-11-29 20:04:32,000 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:32,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2020-11-29 20:04:32,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:32,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2020-11-29 20:04:32,002 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:32,003 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2020-11-29 20:04:32,015 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-11-29 20:04:32,022 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2020-11-29 20:04:32,023 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2020-11-29 20:04:32,023 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2020-11-29 20:04:32,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2020-11-29 20:04:32,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:32,024 INFO L691 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2020-11-29 20:04:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2020-11-29 20:04:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2020-11-29 20:04:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:04:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-11-29 20:04:32,049 INFO L714 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-11-29 20:04:32,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:04:32,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:04:32,051 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 8 states. [2020-11-29 20:04:32,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:32,221 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2020-11-29 20:04:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:04:32,224 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2020-11-29 20:04:32,230 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-11-29 20:04:32,243 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2020-11-29 20:04:32,243 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2020-11-29 20:04:32,244 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2020-11-29 20:04:32,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2020-11-29 20:04:32,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:32,245 INFO L691 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2020-11-29 20:04:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2020-11-29 20:04:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-11-29 20:04:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:04:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-11-29 20:04:32,276 INFO L714 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-11-29 20:04:32,276 INFO L594 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-11-29 20:04:32,276 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 20:04:32,276 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2020-11-29 20:04:32,284 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-11-29 20:04:32,284 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:32,285 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:32,286 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:32,286 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:32,287 INFO L794 eck$LassoCheckResult]: Stem: 749#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 736#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 737#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 766#fibonacciENTRY ~n := #in~n; 798#L17 assume !(~n < 1); 791#L19 assume !(1 == ~n); 756#L22 call #t~ret7 := fibonacci(~n - 1);< 757#fibonacciENTRY ~n := #in~n; 760#L17 assume !(~n < 1); 792#L19 assume !(1 == ~n); 759#L22 call #t~ret7 := fibonacci(~n - 1);< 757#fibonacciENTRY ~n := #in~n; 760#L17 assume !(~n < 1); 792#L19 assume !(1 == ~n); 759#L22 call #t~ret7 := fibonacci(~n - 1);< 757#fibonacciENTRY ~n := #in~n; 761#L17 assume !(~n < 1); 797#L19 assume 1 == ~n;#res := 1; 796#fibonacciFINAL assume true; 795#fibonacciEXIT >#31#return; 752#L22-1 call #t~ret8 := fibonacci(~n - 2);< 794#fibonacciENTRY ~n := #in~n; 827#L17 assume ~n < 1;#res := 0; 826#fibonacciFINAL assume true; 825#fibonacciEXIT >#33#return; 824#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 821#fibonacciFINAL assume true; 818#fibonacciEXIT >#31#return; 755#L22-1 [2020-11-29 20:04:32,287 INFO L796 eck$LassoCheckResult]: Loop: 755#L22-1 call #t~ret8 := fibonacci(~n - 2);< 751#fibonacciENTRY ~n := #in~n; 758#L17 assume !(~n < 1); 800#L19 assume !(1 == ~n); 754#L22 call #t~ret7 := fibonacci(~n - 1);< 751#fibonacciENTRY ~n := #in~n; 758#L17 assume !(~n < 1); 800#L19 assume 1 == ~n;#res := 1; 815#fibonacciFINAL assume true; 816#fibonacciEXIT >#31#return; 755#L22-1 [2020-11-29 20:04:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2137317009, now seen corresponding path program 1 times [2020-11-29 20:04:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:32,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981090656] [2020-11-29 20:04:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 20:04:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:32,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 20:04:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:32,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 20:04:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 20:04:32,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981090656] [2020-11-29 20:04:32,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981391028] [2020-11-29 20:04:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:04:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 20:04:32,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:32,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 20:04:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715808530] [2020-11-29 20:04:32,651 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:32,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1745046499, now seen corresponding path program 2 times [2020-11-29 20:04:32,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:32,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597410035] [2020-11-29 20:04:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:32,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:32,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:32,682 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:32,865 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:32,865 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:32,865 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:32,865 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:32,866 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:32,866 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:32,866 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:32,866 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:32,866 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2020-11-29 20:04:32,866 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:32,866 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:32,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:32,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:32,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:32,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:32,972 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:32,973 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:32,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:32,988 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:33,045 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:33,046 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:33,807 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:33,810 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:33,810 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:33,810 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:33,811 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:33,811 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:33,811 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:33,811 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:33,811 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:33,811 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2020-11-29 20:04:33,811 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:33,811 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:33,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:33,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:33,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:33,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:33,918 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:33,918 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:33,941 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 [2020-11-29 20:04:33,943 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:33,943 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:33,943 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:33,943 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:33,943 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:33,945 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:33,945 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:33,960 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:34,002 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 [2020-11-29 20:04:34,004 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:34,004 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:34,004 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:34,004 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:34,004 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:34,005 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:34,005 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:34,007 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:34,040 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:04:34,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:34,041 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:34,041 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:34,041 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:34,041 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:34,042 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:34,042 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:34,044 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:34,097 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 [2020-11-29 20:04:34,099 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:34,100 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:34,100 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:34,100 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:34,100 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:34,102 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:34,103 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:34,108 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:34,112 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 20:04:34,113 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:34,118 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:34,118 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:34,118 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:34,118 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:34,156 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:34,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:04:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:34,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:34,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:04:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:34,407 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 [2020-11-29 20:04:34,408 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 8 states. [2020-11-29 20:04:34,840 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 8 states. Result 163 states and 217 transitions. Complement of second has 33 states. [2020-11-29 20:04:34,845 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 [2020-11-29 20:04:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 20:04:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-11-29 20:04:34,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 20:04:34,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:34,847 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:34,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:04:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:35,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:35,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:04:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:35,144 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 [2020-11-29 20:04:35,144 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 8 states. [2020-11-29 20:04:35,416 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 8 states. Result 288 states and 387 transitions. Complement of second has 25 states. [2020-11-29 20:04:35,419 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 [2020-11-29 20:04:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 20:04:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-11-29 20:04:35,420 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 20:04:35,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:35,421 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:35,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:04:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:35,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:35,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:04:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:35,665 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 [2020-11-29 20:04:35,666 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 8 states. [2020-11-29 20:04:36,061 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 8 states. Result 826 states and 1091 transitions. Complement of second has 130 states. [2020-11-29 20:04:36,062 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 [2020-11-29 20:04:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 20:04:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-11-29 20:04:36,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 20:04:36,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:36,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-11-29 20:04:36,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:36,072 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-11-29 20:04:36,075 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:36,076 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2020-11-29 20:04:36,113 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-11-29 20:04:36,146 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2020-11-29 20:04:36,146 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2020-11-29 20:04:36,150 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2020-11-29 20:04:36,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2020-11-29 20:04:36,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:36,152 INFO L691 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2020-11-29 20:04:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2020-11-29 20:04:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2020-11-29 20:04:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-29 20:04:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2020-11-29 20:04:36,236 INFO L714 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2020-11-29 20:04:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:04:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:04:36,237 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 11 states. [2020-11-29 20:04:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:36,566 INFO L93 Difference]: Finished difference Result 508 states and 758 transitions. [2020-11-29 20:04:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:04:36,567 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 508 states and 758 transitions. [2020-11-29 20:04:36,578 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:36,597 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 508 states to 506 states and 755 transitions. [2020-11-29 20:04:36,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2020-11-29 20:04:36,599 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 228 [2020-11-29 20:04:36,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 506 states and 755 transitions. [2020-11-29 20:04:36,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:36,600 INFO L691 BuchiCegarLoop]: Abstraction has 506 states and 755 transitions. [2020-11-29 20:04:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states and 755 transitions. [2020-11-29 20:04:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 460. [2020-11-29 20:04:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-11-29 20:04:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 691 transitions. [2020-11-29 20:04:36,663 INFO L714 BuchiCegarLoop]: Abstraction has 460 states and 691 transitions. [2020-11-29 20:04:36,663 INFO L594 BuchiCegarLoop]: Abstraction has 460 states and 691 transitions. [2020-11-29 20:04:36,663 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 20:04:36,664 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 460 states and 691 transitions. [2020-11-29 20:04:36,669 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:36,669 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:36,669 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:36,672 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:36,672 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:04:36,672 INFO L794 eck$LassoCheckResult]: Stem: 3688#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3668#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 3669#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 3715#fibonacciENTRY ~n := #in~n; 3736#L17 assume !(~n < 1); 3735#L19 assume !(1 == ~n); 3731#L22 call #t~ret7 := fibonacci(~n - 1);< 3733#fibonacciENTRY ~n := #in~n; 3734#L17 assume !(~n < 1); 3730#L19 assume !(1 == ~n); 3720#L22 call #t~ret7 := fibonacci(~n - 1);< 3727#fibonacciENTRY ~n := #in~n; 3728#L17 assume !(~n < 1); 3732#L19 assume !(1 == ~n); 3719#L22 call #t~ret7 := fibonacci(~n - 1);< 3727#fibonacciENTRY ~n := #in~n; 3729#L17 assume !(~n < 1); 3718#L19 assume 1 == ~n;#res := 1; 3721#fibonacciFINAL assume true; 4017#fibonacciEXIT >#31#return; 3773#L22-1 call #t~ret8 := fibonacci(~n - 2);< 3775#fibonacciENTRY ~n := #in~n; 3867#L17 assume !(~n < 1); 3865#L19 assume !(1 == ~n); 3857#L22 call #t~ret7 := fibonacci(~n - 1);< 3858#fibonacciENTRY ~n := #in~n; 3880#L17 assume !(~n < 1); 3869#L19 assume !(1 == ~n); 3870#L22 call #t~ret7 := fibonacci(~n - 1);< 3886#fibonacciENTRY [2020-11-29 20:04:36,672 INFO L796 eck$LassoCheckResult]: Loop: 3886#fibonacciENTRY ~n := #in~n; 3982#L17 assume !(~n < 1); 3980#L19 assume !(1 == ~n); 3883#L22 call #t~ret7 := fibonacci(~n - 1);< 3886#fibonacciENTRY [2020-11-29 20:04:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1062437397, now seen corresponding path program 1 times [2020-11-29 20:04:36,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:36,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288879265] [2020-11-29 20:04:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:36,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 20:04:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:04:36,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288879265] [2020-11-29 20:04:36,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614092196] [2020-11-29 20:04:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:36,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:04:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:04:37,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:37,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 20:04:37,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188911483] [2020-11-29 20:04:37,035 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash 927643, now seen corresponding path program 2 times [2020-11-29 20:04:37,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:37,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608872945] [2020-11-29 20:04:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:37,039 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:37,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:37,044 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:37,093 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:37,093 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:37,093 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:37,093 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:37,093 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:37,093 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:37,093 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:37,094 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:37,094 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2020-11-29 20:04:37,094 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:37,094 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:37,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,106 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,177 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:37,177 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:37,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:37,180 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:37,183 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:37,183 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:37,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:37,211 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:37,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:37,242 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:37,325 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:37,327 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:37,328 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:37,328 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:37,328 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:37,328 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:37,328 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:37,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:37,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:37,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2020-11-29 20:04:37,328 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:37,328 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:37,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:37,454 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:37,454 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:37,466 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 [2020-11-29 20:04:37,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:37,469 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:37,469 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:37,469 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:37,469 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:37,473 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:37,473 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:37,475 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:37,523 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 [2020-11-29 20:04:37,525 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:37,525 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:37,525 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:37,525 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:37,525 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:37,527 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:37,527 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:37,531 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:37,535 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:04:37,536 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:37,540 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:37,540 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:37,541 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:37,541 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:37,578 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:04:37,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:37,733 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 [2020-11-29 20:04:37,733 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241 Second operand 5 states. [2020-11-29 20:04:37,843 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241. Second operand 5 states. Result 470 states and 701 transitions. Complement of second has 13 states. [2020-11-29 20:04:37,847 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 [2020-11-29 20:04:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 20:04:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 20:04:37,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 20:04:37,848 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:37,848 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:37,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:04:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:38,040 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 [2020-11-29 20:04:38,040 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241 Second operand 5 states. [2020-11-29 20:04:38,180 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241. Second operand 5 states. Result 470 states and 701 transitions. Complement of second has 13 states. [2020-11-29 20:04:38,181 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 [2020-11-29 20:04:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 20:04:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 20:04:38,182 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 20:04:38,183 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:38,183 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:38,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:04:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:38,353 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 [2020-11-29 20:04:38,353 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241 Second operand 5 states. [2020-11-29 20:04:38,500 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 460 states and 691 transitions. cyclomatic complexity: 241. Second operand 5 states. Result 621 states and 875 transitions. Complement of second has 14 states. [2020-11-29 20:04:38,503 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 [2020-11-29 20:04:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 20:04:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-11-29 20:04:38,505 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 20:04:38,505 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:38,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-11-29 20:04:38,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:38,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-11-29 20:04:38,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:38,509 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 621 states and 875 transitions. [2020-11-29 20:04:38,522 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:38,536 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 621 states to 524 states and 766 transitions. [2020-11-29 20:04:38,536 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 191 [2020-11-29 20:04:38,537 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 200 [2020-11-29 20:04:38,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 524 states and 766 transitions. [2020-11-29 20:04:38,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:38,537 INFO L691 BuchiCegarLoop]: Abstraction has 524 states and 766 transitions. [2020-11-29 20:04:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states and 766 transitions. [2020-11-29 20:04:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 494. [2020-11-29 20:04:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-11-29 20:04:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 730 transitions. [2020-11-29 20:04:38,574 INFO L714 BuchiCegarLoop]: Abstraction has 494 states and 730 transitions. [2020-11-29 20:04:38,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:04:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:04:38,576 INFO L87 Difference]: Start difference. First operand 494 states and 730 transitions. Second operand 12 states. [2020-11-29 20:04:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:38,877 INFO L93 Difference]: Finished difference Result 549 states and 824 transitions. [2020-11-29 20:04:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:04:38,878 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 549 states and 824 transitions. [2020-11-29 20:04:38,912 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:38,926 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 549 states to 546 states and 816 transitions. [2020-11-29 20:04:38,927 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 215 [2020-11-29 20:04:38,927 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 215 [2020-11-29 20:04:38,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 546 states and 816 transitions. [2020-11-29 20:04:38,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:38,928 INFO L691 BuchiCegarLoop]: Abstraction has 546 states and 816 transitions. [2020-11-29 20:04:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states and 816 transitions. [2020-11-29 20:04:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 515. [2020-11-29 20:04:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-11-29 20:04:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 770 transitions. [2020-11-29 20:04:38,964 INFO L714 BuchiCegarLoop]: Abstraction has 515 states and 770 transitions. [2020-11-29 20:04:38,964 INFO L594 BuchiCegarLoop]: Abstraction has 515 states and 770 transitions. [2020-11-29 20:04:38,964 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 20:04:38,964 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 515 states and 770 transitions. [2020-11-29 20:04:38,971 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:38,971 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:38,971 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:38,974 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:38,974 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:04:38,974 INFO L794 eck$LassoCheckResult]: Stem: 7229#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7213#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 7214#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 7241#fibonacciENTRY ~n := #in~n; 7242#L17 assume !(~n < 1); 7279#L19 assume !(1 == ~n); 7275#L22 call #t~ret7 := fibonacci(~n - 1);< 7278#fibonacciENTRY ~n := #in~n; 7277#L17 assume !(~n < 1); 7276#L19 assume !(1 == ~n); 7273#L22 call #t~ret7 := fibonacci(~n - 1);< 7272#fibonacciENTRY ~n := #in~n; 7274#L17 assume !(~n < 1); 7291#L19 assume !(1 == ~n); 7283#L22 call #t~ret7 := fibonacci(~n - 1);< 7288#fibonacciENTRY ~n := #in~n; 7320#L17 assume !(~n < 1); 7314#L19 assume !(1 == ~n); 7282#L22 call #t~ret7 := fibonacci(~n - 1);< 7288#fibonacciENTRY ~n := #in~n; 7321#L17 assume !(~n < 1); 7379#L19 assume 1 == ~n;#res := 1; 7377#fibonacciFINAL assume true; 7376#fibonacciEXIT >#31#return; 7345#L22-1 call #t~ret8 := fibonacci(~n - 2);< 7349#fibonacciENTRY ~n := #in~n; 7622#L17 assume !(~n < 1); 7618#L19 assume !(1 == ~n); 7619#L22 call #t~ret7 := fibonacci(~n - 1);< 7630#fibonacciENTRY ~n := #in~n; 7718#L17 assume !(~n < 1); 7717#L19 assume !(1 == ~n); 7259#L22 call #t~ret7 := fibonacci(~n - 1);< 7263#fibonacciENTRY ~n := #in~n; 7264#L17 assume !(~n < 1); 7721#L19 assume !(1 == ~n); 7260#L22 [2020-11-29 20:04:38,974 INFO L796 eck$LassoCheckResult]: Loop: 7260#L22 call #t~ret7 := fibonacci(~n - 1);< 7263#fibonacciENTRY ~n := #in~n; 7264#L17 assume !(~n < 1); 7721#L19 assume !(1 == ~n); 7260#L22 [2020-11-29 20:04:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash -331346849, now seen corresponding path program 2 times [2020-11-29 20:04:38,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:38,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036263836] [2020-11-29 20:04:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:39,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:04:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 20:04:39,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036263836] [2020-11-29 20:04:39,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572509230] [2020-11-29 20:04:39,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:39,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:04:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:04:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 20:04:39,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:39,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 20:04:39,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332274149] [2020-11-29 20:04:39,320 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 3 times [2020-11-29 20:04:39,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:39,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231351744] [2020-11-29 20:04:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:39,329 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:39,333 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:39,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:39,410 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:39,410 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:39,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:39,411 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:39,411 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:39,411 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:39,411 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:39,411 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:39,411 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2020-11-29 20:04:39,411 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:39,411 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:39,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:39,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:39,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:39,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:39,521 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:39,521 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:39,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:39,529 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:39,563 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:39,564 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:41,731 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:41,734 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:41,734 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:41,734 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:41,735 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:41,735 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:41,735 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:41,735 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:41,735 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:41,735 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2020-11-29 20:04:41,735 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:41,735 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:41,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:41,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:41,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:41,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:41,849 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:41,849 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:41,855 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 [2020-11-29 20:04:41,856 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:41,856 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:41,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:41,857 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:41,857 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:41,858 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:41,858 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:41,860 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:41,864 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:04:41,865 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:41,867 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:41,867 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:41,867 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:41,867 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-11-29 20:04:41,893 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:04:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:42,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:42,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:42,083 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 [2020-11-29 20:04:42,083 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265 Second operand 6 states. [2020-11-29 20:04:42,232 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265. Second operand 6 states. Result 527 states and 783 transitions. Complement of second has 18 states. [2020-11-29 20:04:42,233 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 [2020-11-29 20:04:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:04:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 20:04:42,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 20:04:42,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:42,234 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:04:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:42,457 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 [2020-11-29 20:04:42,457 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265 Second operand 6 states. [2020-11-29 20:04:42,615 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 515 states and 770 transitions. cyclomatic complexity: 265. Second operand 6 states. Result 757 states and 1105 transitions. Complement of second has 22 states. [2020-11-29 20:04:42,616 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 [2020-11-29 20:04:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:04:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 20:04:42,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 20:04:42,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:42,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-11-29 20:04:42,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:42,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-11-29 20:04:42,619 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:42,619 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 757 states and 1105 transitions. [2020-11-29 20:04:42,635 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:42,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 757 states to 693 states and 1036 transitions. [2020-11-29 20:04:42,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2020-11-29 20:04:42,652 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2020-11-29 20:04:42,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 693 states and 1036 transitions. [2020-11-29 20:04:42,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:42,652 INFO L691 BuchiCegarLoop]: Abstraction has 693 states and 1036 transitions. [2020-11-29 20:04:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states and 1036 transitions. [2020-11-29 20:04:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 680. [2020-11-29 20:04:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-11-29 20:04:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1019 transitions. [2020-11-29 20:04:42,690 INFO L714 BuchiCegarLoop]: Abstraction has 680 states and 1019 transitions. [2020-11-29 20:04:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:04:42,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:04:42,691 INFO L87 Difference]: Start difference. First operand 680 states and 1019 transitions. Second operand 14 states. [2020-11-29 20:04:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:43,080 INFO L93 Difference]: Finished difference Result 743 states and 1113 transitions. [2020-11-29 20:04:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:04:43,081 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 743 states and 1113 transitions. [2020-11-29 20:04:43,097 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:43,113 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 743 states to 733 states and 1098 transitions. [2020-11-29 20:04:43,113 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 272 [2020-11-29 20:04:43,114 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 272 [2020-11-29 20:04:43,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 733 states and 1098 transitions. [2020-11-29 20:04:43,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:43,115 INFO L691 BuchiCegarLoop]: Abstraction has 733 states and 1098 transitions. [2020-11-29 20:04:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states and 1098 transitions. [2020-11-29 20:04:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 720. [2020-11-29 20:04:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-11-29 20:04:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1073 transitions. [2020-11-29 20:04:43,152 INFO L714 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-11-29 20:04:43,153 INFO L594 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-11-29 20:04:43,153 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 20:04:43,153 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 720 states and 1073 transitions. [2020-11-29 20:04:43,160 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:43,160 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:43,160 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:43,165 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:43,165 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:04:43,166 INFO L794 eck$LassoCheckResult]: Stem: 10903#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10880#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 10881#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 10927#fibonacciENTRY ~n := #in~n; 10999#L17 assume !(~n < 1); 10997#L19 assume !(1 == ~n); 10994#L22 call #t~ret7 := fibonacci(~n - 1);< 10995#fibonacciENTRY ~n := #in~n; 11011#L17 assume !(~n < 1); 11009#L19 assume !(1 == ~n); 11006#L22 call #t~ret7 := fibonacci(~n - 1);< 11007#fibonacciENTRY ~n := #in~n; 11020#L17 assume !(~n < 1); 11019#L19 assume !(1 == ~n); 11002#L22 call #t~ret7 := fibonacci(~n - 1);< 11018#fibonacciENTRY ~n := #in~n; 11046#L17 assume !(~n < 1); 11038#L19 assume !(1 == ~n); 11026#L22 call #t~ret7 := fibonacci(~n - 1);< 11036#fibonacciENTRY ~n := #in~n; 11088#L17 assume !(~n < 1); 11081#L19 assume !(1 == ~n); 11023#L22 call #t~ret7 := fibonacci(~n - 1);< 11071#fibonacciENTRY ~n := #in~n; 11097#L17 assume !(~n < 1); 11096#L19 assume 1 == ~n;#res := 1; 11095#fibonacciFINAL assume true; 11093#fibonacciEXIT >#31#return; 11083#L22-1 call #t~ret8 := fibonacci(~n - 2);< 11086#fibonacciENTRY ~n := #in~n; 11091#L17 assume ~n < 1;#res := 0; 11089#fibonacciFINAL assume true; 11082#fibonacciEXIT >#33#return; 11080#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11070#fibonacciFINAL assume true; 11035#fibonacciEXIT >#31#return; 11014#L22-1 call #t~ret8 := fibonacci(~n - 2);< 11017#fibonacciENTRY ~n := #in~n; 11132#L17 assume !(~n < 1); 11078#L19 assume !(1 == ~n); 11075#L22 call #t~ret7 := fibonacci(~n - 1);< 11076#fibonacciENTRY ~n := #in~n; 11392#L17 assume !(~n < 1); 11390#L19 assume !(1 == ~n); 11374#L22 call #t~ret7 := fibonacci(~n - 1);< 11384#fibonacciENTRY ~n := #in~n; 11411#L17 assume !(~n < 1); 11423#L19 assume !(1 == ~n); 11375#L22 [2020-11-29 20:04:43,166 INFO L796 eck$LassoCheckResult]: Loop: 11375#L22 call #t~ret7 := fibonacci(~n - 1);< 11384#fibonacciENTRY ~n := #in~n; 11411#L17 assume !(~n < 1); 11423#L19 assume !(1 == ~n); 11375#L22 [2020-11-29 20:04:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1097579499, now seen corresponding path program 2 times [2020-11-29 20:04:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:43,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626320273] [2020-11-29 20:04:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:04:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:43,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 20:04:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:43,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 20:04:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:04:43,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626320273] [2020-11-29 20:04:43,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310726605] [2020-11-29 20:04:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:43,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:04:43,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:04:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:04:43,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:43,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 20:04:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629481137] [2020-11-29 20:04:43,537 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 4 times [2020-11-29 20:04:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:43,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201220711] [2020-11-29 20:04:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:43,541 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:43,543 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:43,544 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:43,610 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:43,610 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:43,610 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:43,610 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:43,610 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:43,610 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:43,610 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:43,610 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:43,610 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2020-11-29 20:04:43,611 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:43,611 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:43,611 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:43,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:43,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:43,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:43,720 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:43,720 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:43,730 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:43,730 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:43,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:43,734 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:43,779 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:43,780 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:43,784 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:43,784 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:43,833 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:43,833 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:43,837 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:43,837 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:43,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:43,883 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:43,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:43,941 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:45,270 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:45,277 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:45,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:45,277 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:45,277 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:45,277 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:45,277 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:45,277 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:45,277 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:45,277 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2020-11-29 20:04:45,277 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:45,278 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:45,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:45,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:45,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:45,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:45,381 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:45,381 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:45,384 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 [2020-11-29 20:04:45,386 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:45,387 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:45,387 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:45,387 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:45,387 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:45,388 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:45,388 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:45,389 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:45,432 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 [2020-11-29 20:04:45,434 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:45,434 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:45,434 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:45,434 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:45,434 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:45,435 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:45,435 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:45,437 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:45,474 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 [2020-11-29 20:04:45,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:45,476 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:45,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:45,476 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:45,476 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:45,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:45,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:45,484 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:45,493 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 20:04:45,494 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:45,497 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:45,497 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:45,497 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:45,497 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-11-29 20:04:45,522 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:04:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:45,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:45,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:45,722 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 [2020-11-29 20:04:45,722 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366 Second operand 6 states. [2020-11-29 20:04:45,907 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366. Second operand 6 states. Result 739 states and 1093 transitions. Complement of second has 18 states. [2020-11-29 20:04:45,908 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 [2020-11-29 20:04:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:04:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 20:04:45,909 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 20:04:45,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:45,910 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:04:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:46,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:46,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:46,154 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 [2020-11-29 20:04:46,154 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366 Second operand 6 states. [2020-11-29 20:04:46,320 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366. Second operand 6 states. Result 920 states and 1304 transitions. Complement of second has 22 states. [2020-11-29 20:04:46,321 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 [2020-11-29 20:04:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:04:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 20:04:46,322 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 20:04:46,323 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:46,323 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:04:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:46,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:46,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:46,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:46,548 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 [2020-11-29 20:04:46,548 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366 Second operand 6 states. [2020-11-29 20:04:46,675 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 720 states and 1073 transitions. cyclomatic complexity: 366. Second operand 6 states. Result 967 states and 1393 transitions. Complement of second has 27 states. [2020-11-29 20:04:46,676 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 [2020-11-29 20:04:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:04:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 20:04:46,677 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 20:04:46,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:46,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-11-29 20:04:46,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:46,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-11-29 20:04:46,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:46,682 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 967 states and 1393 transitions. [2020-11-29 20:04:46,696 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:46,709 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 967 states to 720 states and 1073 transitions. [2020-11-29 20:04:46,710 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 220 [2020-11-29 20:04:46,710 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 256 [2020-11-29 20:04:46,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 720 states and 1073 transitions. [2020-11-29 20:04:46,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:46,711 INFO L691 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-11-29 20:04:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states and 1073 transitions. [2020-11-29 20:04:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2020-11-29 20:04:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-11-29 20:04:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1073 transitions. [2020-11-29 20:04:46,743 INFO L714 BuchiCegarLoop]: Abstraction has 720 states and 1073 transitions. [2020-11-29 20:04:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 20:04:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:04:46,744 INFO L87 Difference]: Start difference. First operand 720 states and 1073 transitions. Second operand 15 states. [2020-11-29 20:04:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:47,317 INFO L93 Difference]: Finished difference Result 785 states and 1155 transitions. [2020-11-29 20:04:47,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:04:47,318 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 785 states and 1155 transitions. [2020-11-29 20:04:47,330 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:47,345 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 785 states to 785 states and 1155 transitions. [2020-11-29 20:04:47,345 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 295 [2020-11-29 20:04:47,347 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 295 [2020-11-29 20:04:47,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 785 states and 1155 transitions. [2020-11-29 20:04:47,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:04:47,347 INFO L691 BuchiCegarLoop]: Abstraction has 785 states and 1155 transitions. [2020-11-29 20:04:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states and 1155 transitions. [2020-11-29 20:04:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 744. [2020-11-29 20:04:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-11-29 20:04:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1109 transitions. [2020-11-29 20:04:47,381 INFO L714 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-11-29 20:04:47,382 INFO L594 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-11-29 20:04:47,382 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 20:04:47,382 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 744 states and 1109 transitions. [2020-11-29 20:04:47,389 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:04:47,389 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:04:47,389 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:04:47,392 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:47,393 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:04:47,395 INFO L794 eck$LassoCheckResult]: Stem: 16523#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16506#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 16507#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 16545#fibonacciENTRY ~n := #in~n; 16626#L17 assume !(~n < 1); 16625#L19 assume !(1 == ~n); 16621#L22 call #t~ret7 := fibonacci(~n - 1);< 16624#fibonacciENTRY ~n := #in~n; 16623#L17 assume !(~n < 1); 16622#L19 assume !(1 == ~n); 16617#L22 call #t~ret7 := fibonacci(~n - 1);< 16620#fibonacciENTRY ~n := #in~n; 16619#L17 assume !(~n < 1); 16618#L19 assume !(1 == ~n); 16610#L22 call #t~ret7 := fibonacci(~n - 1);< 16616#fibonacciENTRY ~n := #in~n; 16614#L17 assume !(~n < 1); 16612#L19 assume !(1 == ~n); 16597#L22 call #t~ret7 := fibonacci(~n - 1);< 16602#fibonacciENTRY ~n := #in~n; 16608#L17 assume !(~n < 1); 16606#L19 assume !(1 == ~n); 16598#L22 call #t~ret7 := fibonacci(~n - 1);< 16602#fibonacciENTRY ~n := #in~n; 16609#L17 assume !(~n < 1); 16607#L19 assume 1 == ~n;#res := 1; 16604#fibonacciFINAL assume true; 16596#fibonacciEXIT >#31#return; 16595#L22-1 call #t~ret8 := fibonacci(~n - 2);< 16711#fibonacciENTRY ~n := #in~n; 16737#L17 assume !(~n < 1); 16736#L19 assume !(1 == ~n); 16592#L22 call #t~ret7 := fibonacci(~n - 1);< 16600#fibonacciENTRY ~n := #in~n; 16615#L17 assume !(~n < 1); 17249#L19 assume !(1 == ~n); 17141#L22 call #t~ret7 := fibonacci(~n - 1);< 17168#fibonacciENTRY ~n := #in~n; 17237#L17 assume !(~n < 1); 17236#L19 assume 1 == ~n;#res := 1; 17234#fibonacciFINAL assume true; 17166#fibonacciEXIT >#31#return; 16890#L22-1 call #t~ret8 := fibonacci(~n - 2);< 16891#fibonacciENTRY ~n := #in~n; 17231#L17 assume ~n < 1;#res := 0; 17169#fibonacciFINAL assume true; 17156#fibonacciEXIT >#33#return; 16796#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 16793#fibonacciFINAL assume true; 16741#fibonacciEXIT >#31#return; 16707#L22-1 call #t~ret8 := fibonacci(~n - 2);< 16739#fibonacciENTRY ~n := #in~n; 16805#L17 assume !(~n < 1); 16803#L19 assume !(1 == ~n); 16745#L22 call #t~ret7 := fibonacci(~n - 1);< 16747#fibonacciENTRY ~n := #in~n; 16810#L17 assume !(~n < 1); 17058#L19 assume !(1 == ~n); 16838#L22 call #t~ret7 := fibonacci(~n - 1);< 16846#fibonacciENTRY ~n := #in~n; 16997#L17 assume !(~n < 1); 16996#L19 assume !(1 == ~n); 16839#L22 [2020-11-29 20:04:47,396 INFO L796 eck$LassoCheckResult]: Loop: 16839#L22 call #t~ret7 := fibonacci(~n - 1);< 16846#fibonacciENTRY ~n := #in~n; 16997#L17 assume !(~n < 1); 16996#L19 assume !(1 == ~n); 16839#L22 [2020-11-29 20:04:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash -717787987, now seen corresponding path program 3 times [2020-11-29 20:04:47,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:47,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469248849] [2020-11-29 20:04:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:47,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 20:04:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:47,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-29 20:04:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:47,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 20:04:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:47,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 20:04:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-29 20:04:47,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469248849] [2020-11-29 20:04:47,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008360020] [2020-11-29 20:04:47,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:47,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 20:04:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:47,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:04:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-29 20:04:47,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:47,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-11-29 20:04:47,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692135282] [2020-11-29 20:04:47,884 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:04:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 5 times [2020-11-29 20:04:47,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570038375] [2020-11-29 20:04:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:47,888 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:04:47,890 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:04:47,891 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:04:47,941 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:47,941 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:47,941 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:47,941 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:47,941 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:04:47,941 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:47,941 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:47,941 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:47,941 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2020-11-29 20:04:47,942 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:47,942 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:47,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:47,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:47,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:47,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:48,076 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:48,076 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:48,083 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:48,083 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:48,086 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:48,086 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:48,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:48,114 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:04:48,117 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:04:48,117 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:48,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:04:48,144 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:04:48,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:04:48,188 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:59,100 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:04:59,102 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:04:59,103 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:04:59,103 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:04:59,103 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:04:59,103 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:04:59,103 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:59,103 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:04:59,103 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:04:59,103 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2020-11-29 20:04:59,103 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:04:59,103 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:04:59,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:59,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:59,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:59,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:04:59,178 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:04:59,178 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:59,188 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 [2020-11-29 20:04:59,189 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:59,189 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:59,189 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:59,189 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:59,190 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:59,190 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:59,190 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:59,191 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:59,221 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 [2020-11-29 20:04:59,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:59,222 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:59,223 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:59,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:59,223 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:59,223 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:59,223 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:59,225 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:59,258 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 [2020-11-29 20:04:59,260 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:59,260 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:59,260 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:59,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:59,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:59,261 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:59,261 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:59,262 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:04:59,291 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 [2020-11-29 20:04:59,292 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:04:59,292 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:04:59,293 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:04:59,293 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:04:59,293 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:04:59,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:04:59,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:04:59,298 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:04:59,301 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 20:04:59,301 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:04:59,304 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:04:59,304 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:04:59,304 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:04:59,304 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2020-11-29 20:04:59,329 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:04:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 20:04:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:59,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:59,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:59,567 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 [2020-11-29 20:04:59,567 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378 Second operand 6 states. [2020-11-29 20:04:59,664 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378. Second operand 6 states. Result 763 states and 1129 transitions. Complement of second has 18 states. [2020-11-29 20:04:59,665 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 [2020-11-29 20:04:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:04:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 20:04:59,665 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 20:04:59,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:04:59,666 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:04:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 20:04:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:59,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:59,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:04:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:04:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:59,925 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 [2020-11-29 20:04:59,925 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378 Second operand 6 states. [2020-11-29 20:05:00,034 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378. Second operand 6 states. Result 944 states and 1340 transitions. Complement of second has 22 states. [2020-11-29 20:05:00,035 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 [2020-11-29 20:05:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:05:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 20:05:00,036 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 20:05:00,036 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:00,036 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:05:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 20:05:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:00,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:00,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:05:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:05:00,345 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 [2020-11-29 20:05:00,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378 Second operand 6 states. [2020-11-29 20:05:00,460 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 744 states and 1109 transitions. cyclomatic complexity: 378. Second operand 6 states. Result 991 states and 1429 transitions. Complement of second has 27 states. [2020-11-29 20:05:00,461 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 [2020-11-29 20:05:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:05:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 20:05:00,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 20:05:00,462 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:00,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-11-29 20:05:00,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:00,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-11-29 20:05:00,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:00,466 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 991 states and 1429 transitions. [2020-11-29 20:05:00,480 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 20:05:00,493 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 991 states to 744 states and 1109 transitions. [2020-11-29 20:05:00,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2020-11-29 20:05:00,494 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2020-11-29 20:05:00,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 744 states and 1109 transitions. [2020-11-29 20:05:00,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:05:00,495 INFO L691 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-11-29 20:05:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states and 1109 transitions. [2020-11-29 20:05:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2020-11-29 20:05:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-11-29 20:05:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1109 transitions. [2020-11-29 20:05:00,529 INFO L714 BuchiCegarLoop]: Abstraction has 744 states and 1109 transitions. [2020-11-29 20:05:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:05:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:05:00,530 INFO L87 Difference]: Start difference. First operand 744 states and 1109 transitions. Second operand 23 states. [2020-11-29 20:05:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:01,315 INFO L93 Difference]: Finished difference Result 456 states and 594 transitions. [2020-11-29 20:05:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:05:01,316 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 594 transitions. [2020-11-29 20:05:01,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 20:05:01,330 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 511 transitions. [2020-11-29 20:05:01,330 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-11-29 20:05:01,330 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-11-29 20:05:01,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 511 transitions. [2020-11-29 20:05:01,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:05:01,331 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 511 transitions. [2020-11-29 20:05:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 511 transitions. [2020-11-29 20:05:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-11-29 20:05:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-29 20:05:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 429 transitions. [2020-11-29 20:05:01,347 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 429 transitions. [2020-11-29 20:05:01,347 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 429 transitions. [2020-11-29 20:05:01,347 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 20:05:01,347 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 429 transitions. [2020-11-29 20:05:01,350 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 20:05:01,351 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:05:01,351 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:05:01,355 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 20:05:01,356 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 20:05:01,357 INFO L794 eck$LassoCheckResult]: Stem: 22126#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22106#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 22107#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 22148#fibonacciENTRY ~n := #in~n; 22235#L17 assume !(~n < 1); 22233#L19 assume !(1 == ~n); 22229#L22 call #t~ret7 := fibonacci(~n - 1);< 22230#fibonacciENTRY ~n := #in~n; 22264#L17 assume !(~n < 1); 22261#L19 assume !(1 == ~n); 22239#L22 call #t~ret7 := fibonacci(~n - 1);< 22242#fibonacciENTRY ~n := #in~n; 22254#L17 assume !(~n < 1); 22253#L19 assume !(1 == ~n); 22237#L22 call #t~ret7 := fibonacci(~n - 1);< 22240#fibonacciENTRY ~n := #in~n; 22259#L17 assume !(~n < 1); 22258#L19 assume !(1 == ~n); 22256#L22 call #t~ret7 := fibonacci(~n - 1);< 22257#fibonacciENTRY ~n := #in~n; 22379#L17 assume !(~n < 1); 22377#L19 assume !(1 == ~n); 22141#L22 call #t~ret7 := fibonacci(~n - 1);< 22140#fibonacciENTRY ~n := #in~n; 22143#L17 assume !(~n < 1); 22147#L19 assume !(1 == ~n); 22142#L22 call #t~ret7 := fibonacci(~n - 1);< 22140#fibonacciENTRY ~n := #in~n; 22143#L17 assume !(~n < 1); 22147#L19 assume !(1 == ~n); 22142#L22 call #t~ret7 := fibonacci(~n - 1);< 22140#fibonacciENTRY ~n := #in~n; 22143#L17 assume !(~n < 1); 22147#L19 assume !(1 == ~n); 22142#L22 call #t~ret7 := fibonacci(~n - 1);< 22376#fibonacciENTRY ~n := #in~n; 22414#L17 assume !(~n < 1); 22413#L19 assume 1 == ~n;#res := 1; 22412#fibonacciFINAL assume true; 22411#fibonacciEXIT >#31#return; 22408#L22-1 call #t~ret8 := fibonacci(~n - 2);< 22409#fibonacciENTRY ~n := #in~n; 22422#L17 assume ~n < 1;#res := 0; 22421#fibonacciFINAL assume true; 22407#fibonacciEXIT >#33#return; 22404#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22402#fibonacciFINAL assume true; 22394#fibonacciEXIT >#31#return; 22137#L22-1 call #t~ret8 := fibonacci(~n - 2);< 22386#fibonacciENTRY ~n := #in~n; 22396#L17 assume !(~n < 1); 22389#L19 assume 1 == ~n;#res := 1; 22388#fibonacciFINAL assume true; 22383#fibonacciEXIT >#33#return; 22382#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22381#fibonacciFINAL assume true; 22263#fibonacciEXIT >#31#return; 22139#L22-1 call #t~ret8 := fibonacci(~n - 2);< 22250#fibonacciENTRY ~n := #in~n; 22397#L17 assume !(~n < 1); 22390#L19 assume !(1 == ~n); 22109#L22 call #t~ret7 := fibonacci(~n - 1);< 22212#fibonacciENTRY ~n := #in~n; 22214#L17 assume !(~n < 1); 22200#L19 assume !(1 == ~n); 22169#L22 call #t~ret7 := fibonacci(~n - 1);< 22171#fibonacciENTRY ~n := #in~n; 22194#L17 assume !(~n < 1); 22190#L19 assume !(1 == ~n); 22167#L22 [2020-11-29 20:05:01,358 INFO L796 eck$LassoCheckResult]: Loop: 22167#L22 call #t~ret7 := fibonacci(~n - 1);< 22171#fibonacciENTRY ~n := #in~n; 22194#L17 assume !(~n < 1); 22190#L19 assume !(1 == ~n); 22167#L22 [2020-11-29 20:05:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1290699209, now seen corresponding path program 4 times [2020-11-29 20:05:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:01,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068807163] [2020-11-29 20:05:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:05:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 20:05:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 20:05:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 20:05:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 20:05:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 20:05:01,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068807163] [2020-11-29 20:05:01,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573596936] [2020-11-29 20:05:01,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:01,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:05:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:05:01,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 20:05:01,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:01,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2020-11-29 20:05:01,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562459627] [2020-11-29 20:05:01,885 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 20:05:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1817383, now seen corresponding path program 6 times [2020-11-29 20:05:01,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:01,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437533282] [2020-11-29 20:05:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:05:01,889 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:05:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:05:01,890 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:05:01,891 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:05:01,947 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:05:01,948 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:05:01,948 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:05:01,948 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:05:01,948 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:05:01,948 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:05:01,948 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:05:01,948 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:05:01,948 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2020-11-29 20:05:01,948 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:05:01,948 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:05:01,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:01,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:01,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:01,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:02,027 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:05:02,027 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:05:02,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:05:02,030 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:05:02,033 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:05:02,033 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:05:02,061 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:05:02,062 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:05:02,094 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:05:02,094 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:05:12,999 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:05:13,002 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:05:13,002 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:05:13,002 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:05:13,002 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:05:13,003 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:05:13,003 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:05:13,003 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:05:13,003 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:05:13,003 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2020-11-29 20:05:13,003 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:05:13,003 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:05:13,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:13,008 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:13,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:13,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:05:13,068 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:05:13,068 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:05:13,071 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 [2020-11-29 20:05:13,073 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:05:13,073 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:05:13,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:05:13,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:05:13,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:05:13,084 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:05:13,085 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:05:13,086 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/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 [2020-11-29 20:05:13,113 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 [2020-11-29 20:05:13,115 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:05:13,115 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:05:13,115 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:05:13,115 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:05:13,115 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:05:13,116 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:05:13,116 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:05:13,120 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:05:13,130 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:05:13,131 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f1a599ba-0176-4bf5-a591-38526ef0f3a5/bin/uautomizer/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:05:13,138 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:05:13,138 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:05:13,138 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:05:13,138 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:05:13,168 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:05:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:05:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:13,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:05:13,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:05:13,450 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 [2020-11-29 20:05:13,450 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115 Second operand 6 states. [2020-11-29 20:05:13,558 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115. Second operand 6 states. Result 337 states and 449 transitions. Complement of second has 18 states. [2020-11-29 20:05:13,559 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 [2020-11-29 20:05:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:05:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 20:05:13,559 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 20:05:13,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:13,560 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:05:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:05:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:13,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:05:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:05:13,792 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 20:05:13,792 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115 Second operand 6 states. [2020-11-29 20:05:13,899 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115. Second operand 6 states. Result 343 states and 455 transitions. Complement of second has 17 states. [2020-11-29 20:05:13,905 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 [2020-11-29 20:05:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:05:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 20:05:13,906 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 20:05:13,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:13,906 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:05:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:05:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:14,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:14,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:14,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:14,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:05:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:05:14,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:05:14,162 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 [2020-11-29 20:05:14,162 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115 Second operand 6 states. [2020-11-29 20:05:14,271 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 429 transitions. cyclomatic complexity: 115. Second operand 6 states. Result 424 states and 559 transitions. Complement of second has 27 states. [2020-11-29 20:05:14,272 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 [2020-11-29 20:05:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 20:05:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 20:05:14,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 20:05:14,273 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:14,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 20:05:14,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:14,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-29 20:05:14,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:05:14,275 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 559 transitions. [2020-11-29 20:05:14,281 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 20:05:14,287 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 439 transitions. [2020-11-29 20:05:14,287 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-11-29 20:05:14,287 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-11-29 20:05:14,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 439 transitions. [2020-11-29 20:05:14,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:05:14,291 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 439 transitions. [2020-11-29 20:05:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 439 transitions. [2020-11-29 20:05:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-11-29 20:05:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-29 20:05:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 429 transitions. [2020-11-29 20:05:14,304 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 429 transitions. [2020-11-29 20:05:14,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:05:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:05:14,306 INFO L87 Difference]: Start difference. First operand 318 states and 429 transitions. Second operand 22 states. [2020-11-29 20:05:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:14,942 INFO L93 Difference]: Finished difference Result 401 states and 498 transitions. [2020-11-29 20:05:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 20:05:14,942 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 401 states and 498 transitions. [2020-11-29 20:05:14,947 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 20:05:14,947 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 401 states to 0 states and 0 transitions. [2020-11-29 20:05:14,947 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 20:05:14,948 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 20:05:14,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 20:05:14,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 20:05:14,948 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:05:14,948 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:05:14,948 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:05:14,948 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 20:05:14,949 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:05:14,949 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 20:05:14,949 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 20:05:14,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 08:05:14 BoogieIcfgContainer [2020-11-29 20:05:14,956 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 20:05:14,957 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:05:14,957 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:05:14,957 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:05:14,958 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:04:27" (3/4) ... [2020-11-29 20:05:14,961 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:05:14,961 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:05:14,963 INFO L168 Benchmark]: Toolchain (without parser) took 48683.37 ms. Allocated memory was 98.6 MB in the beginning and 249.6 MB in the end (delta: 151.0 MB). Free memory was 60.1 MB in the beginning and 181.4 MB in the end (delta: -121.4 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:14,964 INFO L168 Benchmark]: CDTParser took 1.03 ms. Allocated memory is still 98.6 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:05:14,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.54 ms. Allocated memory is still 98.6 MB. Free memory was 59.9 MB in the beginning and 77.1 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:14,965 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.13 ms. Allocated memory is still 98.6 MB. Free memory was 77.1 MB in the beginning and 75.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:14,965 INFO L168 Benchmark]: Boogie Preprocessor took 22.18 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 74.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:14,966 INFO L168 Benchmark]: RCFGBuilder took 438.32 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 63.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:14,966 INFO L168 Benchmark]: BuchiAutomizer took 47899.25 ms. Allocated memory was 98.6 MB in the beginning and 249.6 MB in the end (delta: 151.0 MB). Free memory was 63.8 MB in the beginning and 181.4 MB in the end (delta: -117.6 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:14,967 INFO L168 Benchmark]: Witness Printer took 5.02 ms. Allocated memory is still 249.6 MB. Free memory is still 181.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:05:14,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.03 ms. Allocated memory is still 98.6 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.54 ms. Allocated memory is still 98.6 MB. Free memory was 59.9 MB in the beginning and 77.1 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.13 ms. Allocated memory is still 98.6 MB. Free memory was 77.1 MB in the beginning and 75.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.18 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 74.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 438.32 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 63.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 47899.25 ms. Allocated memory was 98.6 MB in the beginning and 249.6 MB in the end (delta: 151.0 MB). Free memory was 63.8 MB in the beginning and 181.4 MB in the end (delta: -117.6 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.02 ms. Allocated memory is still 249.6 MB. Free memory is still 181.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (8 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 47.8s and 10 iterations. TraceHistogramMax:14. Analysis of lassos took 35.1s. Construction of modules took 3.0s. Büchi inclusion checks took 8.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 356 StatesRemovedByMinimization, 12 NontrivialMinimizations. Non-live state removal took 0.4s Buchi closure took 0.0s. Biggest automaton had 744 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 354 SDtfs, 837 SDslu, 658 SDs, 0 SdLazy, 2121 SolverSat, 516 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf90 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 27.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...