./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive/Fibonacci03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c18b98479d83d3111a28d9798b2d068fc51f15fb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 16:27:50,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 16:27:50,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 16:27:50,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 16:27:50,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 16:27:50,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 16:27:50,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 16:27:50,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 16:27:50,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 16:27:50,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 16:27:50,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 16:27:50,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 16:27:50,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 16:27:50,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 16:27:50,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 16:27:50,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 16:27:50,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 16:27:50,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 16:27:50,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 16:27:50,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 16:27:50,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 16:27:50,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 16:27:50,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 16:27:50,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 16:27:50,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 16:27:50,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 16:27:50,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 16:27:50,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 16:27:50,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 16:27:50,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 16:27:50,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 16:27:50,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 16:27:50,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 16:27:50,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 16:27:50,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 16:27:50,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 16:27:50,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 16:27:50,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 16:27:50,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 16:27:50,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 16:27:50,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 16:27:50,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 16:27:50,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 16:27:50,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 16:27:50,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 16:27:50,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 16:27:50,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 16:27:50,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 16:27:50,237 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 16:27:50,237 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 16:27:50,238 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 16:27:50,238 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 16:27:50,238 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 16:27:50,238 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 16:27:50,239 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 16:27:50,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 16:27:50,239 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 16:27:50,239 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 16:27:50,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 16:27:50,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 16:27:50,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 16:27:50,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 16:27:50,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 16:27:50,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 16:27:50,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 16:27:50,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 16:27:50,241 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 16:27:50,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 16:27:50,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 16:27:50,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 16:27:50,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 16:27:50,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 16:27:50,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 16:27:50,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 16:27:50,243 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 16:27:50,243 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c18b98479d83d3111a28d9798b2d068fc51f15fb [2021-08-27 16:27:50,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 16:27:50,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 16:27:50,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 16:27:50,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 16:27:50,528 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 16:27:50,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci03.c [2021-08-27 16:27:50,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e95a9802/ff17d5fc2a6d4b5cb437a725ff1f240a/FLAG0f61e6021 [2021-08-27 16:27:50,875 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 16:27:50,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c [2021-08-27 16:27:50,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e95a9802/ff17d5fc2a6d4b5cb437a725ff1f240a/FLAG0f61e6021 [2021-08-27 16:27:51,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e95a9802/ff17d5fc2a6d4b5cb437a725ff1f240a [2021-08-27 16:27:51,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 16:27:51,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 16:27:51,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 16:27:51,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 16:27:51,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 16:27:51,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3c1ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51, skipping insertion in model container [2021-08-27 16:27:51,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 16:27:51,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 16:27:51,423 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-08-27 16:27:51,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:27:51,429 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 16:27:51,438 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-08-27 16:27:51,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:27:51,447 INFO L208 MainTranslator]: Completed translation [2021-08-27 16:27:51,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51 WrapperNode [2021-08-27 16:27:51,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 16:27:51,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 16:27:51,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 16:27:51,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 16:27:51,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 16:27:51,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 16:27:51,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 16:27:51,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 16:27:51,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 16:27:51,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 16:27:51,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 16:27:51,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 16:27:51,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (1/1) ... [2021-08-27 16:27:51,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:51,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:51,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:51,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 16:27:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-08-27 16:27:51,597 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-08-27 16:27:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 16:27:51,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 16:27:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 16:27:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 16:27:51,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 16:27:51,792 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 16:27:51,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:27:51 BoogieIcfgContainer [2021-08-27 16:27:51,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 16:27:51,794 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 16:27:51,794 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 16:27:51,796 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 16:27:51,810 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:27:51,811 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 04:27:51" (1/3) ... [2021-08-27 16:27:51,812 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@38a72419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:27:51, skipping insertion in model container [2021-08-27 16:27:51,812 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:27:51,812 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:51" (2/3) ... [2021-08-27 16:27:51,812 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@38a72419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:27:51, skipping insertion in model container [2021-08-27 16:27:51,812 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:27:51,812 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:27:51" (3/3) ... [2021-08-27 16:27:51,814 INFO L389 chiAutomizerObserver]: Analyzing ICFG Fibonacci03.c [2021-08-27 16:27:51,849 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 16:27:51,849 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 16:27:51,850 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 16:27:51,850 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 16:27:51,850 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 16:27:51,850 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 16:27:51,850 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 16:27:51,850 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 16:27:51,861 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 16:27:51,879 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:51,879 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:27:51,879 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:27:51,883 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 16:27:51,884 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:27:51,884 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 16:27:51,884 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 16:27:51,885 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:51,885 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:27:51,886 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:27:51,886 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-08-27 16:27:51,886 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:27:51,890 INFO L791 eck$LassoCheckResult]: Stem: 7#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); 14#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 11#L29true assume !(main_~x~0 > 46); 15#L32true call main_#t~ret10 := fibonacci(main_~x~0);< 5#fibonacciENTRYtrue [2021-08-27 16:27:51,890 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 19#L19true assume !(1 == ~n); 18#L22true call #t~ret7 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-08-27 16:27:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1325876, now seen corresponding path program 1 times [2021-08-27 16:27:51,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:51,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408636760] [2021-08-27 16:27:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:51,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:51,979 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:52,016 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 1 times [2021-08-27 16:27:52,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:52,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861689135] [2021-08-27 16:27:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:52,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:52,029 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:52,038 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash 408654161, now seen corresponding path program 1 times [2021-08-27 16:27:52,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:52,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344111957] [2021-08-27 16:27:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:52,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:52,064 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:52,086 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:52,222 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:52,222 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:52,222 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:52,222 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:52,223 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:27:52,223 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,223 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:52,223 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:52,223 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2021-08-27 16:27:52,223 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:52,223 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:52,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,239 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,348 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:27:52,348 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:27:52,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,366 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:52,366 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:52,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 16:27:52,391 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:27:52,391 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:27:52,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 16:27:52,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:52,429 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:52,437 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:27:52,437 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:27:52,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 16:27:52,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:52,465 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:52,475 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:27:52,475 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:27:52,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 16:27:52,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:52,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:52,507 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:27:52,507 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:27:52,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 16:27:52,526 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:52,526 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:52,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 16:27:52,558 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:27:52,558 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:52,613 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:27:52,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,617 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:52,617 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:52,617 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:52,617 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:52,617 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:27:52,617 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,617 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:52,617 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:52,617 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2021-08-27 16:27:52,617 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:52,617 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:52,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:52,729 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:27:52,732 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:27:52,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,736 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 16:27:52,738 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:52,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:52,745 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:52,746 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:52,746 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:52,746 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:52,748 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:52,748 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:52,751 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:52,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 16:27:52,770 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:52,776 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:52,776 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:52,776 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:52,776 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:52,776 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:52,777 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:52,777 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:52,784 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:52,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-08-27 16:27:52,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 16:27:52,807 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:52,813 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:52,813 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:52,814 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:52,814 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:52,814 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:52,814 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:52,814 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:52,816 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:52,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 16:27:52,835 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:52,843 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:52,843 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:52,843 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:52,843 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:52,843 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:52,844 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:52,844 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:52,845 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:52,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,861 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 16:27:52,864 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:52,870 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:52,870 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:52,870 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:52,870 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:52,870 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:52,872 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:52,872 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:52,891 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:27:52,895 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:27:52,895 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:27:52,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:52,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:52,897 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:52,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 16:27:52,899 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:27:52,899 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:27:52,899 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:27:52,900 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-08-27 16:27:52,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:52,920 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:27:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 16:27:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:27:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:27:53,089 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 [2021-08-27 16:27:53,090 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:27:53,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:53,219 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 51 states and 63 transitions. Complement of second has 12 states. [2021-08-27 16:27:53,221 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 [2021-08-27 16:27:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:27:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-08-27 16:27:53,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2021-08-27 16:27:53,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:53,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2021-08-27 16:27:53,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:53,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2021-08-27 16:27:53,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:53,225 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 63 transitions. [2021-08-27 16:27:53,228 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:53,231 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 26 states and 35 transitions. [2021-08-27 16:27:53,232 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2021-08-27 16:27:53,232 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2021-08-27 16:27:53,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-08-27 16:27:53,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:27:53,233 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-08-27 16:27:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-08-27 16:27:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-08-27 16:27:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 16:27:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-08-27 16:27:53,250 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-08-27 16:27:53,250 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-08-27 16:27:53,250 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 16:27:53,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2021-08-27 16:27:53,251 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:53,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:27:53,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:27:53,252 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:27:53,252 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:27:53,252 INFO L791 eck$LassoCheckResult]: Stem: 140#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); 141#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 143#L29 assume !(main_~x~0 > 46); 131#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 133#fibonacciENTRY ~n := #in~n; 134#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 129#L22 call #t~ret7 := fibonacci(~n - 1);< 135#fibonacciENTRY ~n := #in~n; 136#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 142#fibonacciEXIT >#34#return; 128#L22-1 [2021-08-27 16:27:53,252 INFO L793 eck$LassoCheckResult]: Loop: 128#L22-1 call #t~ret8 := fibonacci(~n - 2);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume !(~n < 1); 147#L19 assume !(1 == ~n); 130#L22 call #t~ret7 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 146#fibonacciEXIT >#34#return; 128#L22-1 [2021-08-27 16:27:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1923124650, now seen corresponding path program 1 times [2021-08-27 16:27:53,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:53,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175561002] [2021-08-27 16:27:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:53,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 16:27:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 16:27:53,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:27:53,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175561002] [2021-08-27 16:27:53,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175561002] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:27:53,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:27:53,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:27:53,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717201347] [2021-08-27 16:27:53,332 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:27:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash 481649848, now seen corresponding path program 1 times [2021-08-27 16:27:53,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:53,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211840181] [2021-08-27 16:27:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:53,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 16:27:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 16:27:53,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:27:53,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211840181] [2021-08-27 16:27:53,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211840181] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:27:53,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:27:53,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:27:53,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439547595] [2021-08-27 16:27:53,383 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:27:53,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:27:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 16:27:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 16:27:53,386 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 16:27:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:27:53,466 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-08-27 16:27:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 16:27:53,467 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2021-08-27 16:27:53,469 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:53,469 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2021-08-27 16:27:53,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-08-27 16:27:53,470 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-08-27 16:27:53,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2021-08-27 16:27:53,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:27:53,470 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-08-27 16:27:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2021-08-27 16:27:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-27 16:27:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 16:27:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-08-27 16:27:53,473 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-08-27 16:27:53,473 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-08-27 16:27:53,473 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 16:27:53,473 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2021-08-27 16:27:53,474 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:53,474 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:27:53,474 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:27:53,475 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:27:53,475 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-27 16:27:53,475 INFO L791 eck$LassoCheckResult]: Stem: 215#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); 216#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 219#L29 assume !(main_~x~0 > 46); 204#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 221#fibonacciENTRY ~n := #in~n; 210#L17 assume !(~n < 1); 214#L19 assume !(1 == ~n); 205#L22 call #t~ret7 := fibonacci(~n - 1);< 209#fibonacciENTRY ~n := #in~n; 211#L17 assume !(~n < 1); 227#L19 assume 1 == ~n;#res := 1; 226#fibonacciFINAL assume true; 225#fibonacciEXIT >#34#return; 203#L22-1 [2021-08-27 16:27:53,475 INFO L793 eck$LassoCheckResult]: Loop: 203#L22-1 call #t~ret8 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret7 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret7 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#34#return; 203#L22-1 call #t~ret8 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume ~n < 1;#res := 0; 212#fibonacciFINAL assume true; 217#fibonacciEXIT >#36#return; 218#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 220#fibonacciFINAL assume true; 224#fibonacciEXIT >#34#return; 203#L22-1 [2021-08-27 16:27:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -512653656, now seen corresponding path program 1 times [2021-08-27 16:27:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:53,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127759494] [2021-08-27 16:27:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:53,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:53,483 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:53,507 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 1 times [2021-08-27 16:27:53,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:53,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888931392] [2021-08-27 16:27:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:53,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:53,517 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:53,526 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:53,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash 911295463, now seen corresponding path program 1 times [2021-08-27 16:27:53,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:53,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295808437] [2021-08-27 16:27:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:53,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 16:27:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 16:27:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:27:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:27:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-27 16:27:53,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:27:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295808437] [2021-08-27 16:27:53,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295808437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:27:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087450035] [2021-08-27 16:27:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:53,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:27:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:53,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:27:53,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 16:27:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:27:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 16:27:53,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087450035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:27:53,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:27:53,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-27 16:27:53,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773254665] [2021-08-27 16:27:54,209 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:54,209 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:54,209 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:54,209 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:54,209 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:27:54,209 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:54,209 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:54,209 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:54,210 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2021-08-27 16:27:54,210 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:54,210 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:54,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:54,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:54,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:54,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:54,283 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:27:54,283 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:27:54,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:54,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:54,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:54,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 16:27:54,303 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:54,303 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:54,310 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:27:54,310 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:27:54,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:54,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:54,326 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:54,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 16:27:54,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:54,329 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:54,349 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:27:54,349 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:27:54,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:54,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:54,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:54,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 16:27:54,369 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:54,369 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:54,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:54,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:54,398 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:54,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 16:27:54,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:27:54,409 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:54,992 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:27:54,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-08-27 16:27:54,996 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:54,996 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:54,996 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:54,996 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:54,996 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:27:54,996 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:54,996 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:54,996 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:54,996 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2021-08-27 16:27:54,996 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:54,996 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:54,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:55,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:55,002 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:55,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:55,076 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:27:55,076 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:27:55,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:55,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:55,078 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:55,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 16:27:55,080 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:55,086 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:55,086 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:55,087 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:55,087 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:55,087 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:55,087 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:55,087 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:55,092 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:55,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:55,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:55,110 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:55,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 16:27:55,112 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:55,118 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:55,118 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:55,118 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:55,118 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:55,118 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:55,119 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:55,119 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:55,120 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:55,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:55,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:55,137 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:55,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-27 16:27:55,138 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:55,144 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:55,144 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:55,145 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:55,145 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:55,145 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:55,145 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:55,145 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:55,146 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:27:55,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:55,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:55,167 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:55,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-27 16:27:55,169 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:55,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:55,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:55,175 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:55,175 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:55,176 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:55,177 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:55,177 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:55,178 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:27:55,181 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:27:55,181 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:27:55,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:55,187 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:55,199 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:27:55,199 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:27:55,199 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:27:55,199 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-08-27 16:27:55,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-27 16:27:55,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:55,218 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:27:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:27:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 16:27:55,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:55,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 16:27:55,604 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-08-27 16:27:55,604 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 16:27:55,811 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 160 states and 216 transitions. Complement of second has 48 states. [2021-08-27 16:27:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-08-27 16:27:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 16:27:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2021-08-27 16:27:55,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2021-08-27 16:27:55,814 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:55,814 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2021-08-27 16:27:55,814 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:55,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2021-08-27 16:27:55,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:55,815 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2021-08-27 16:27:55,820 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2021-08-27 16:27:55,823 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2021-08-27 16:27:55,823 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2021-08-27 16:27:55,824 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2021-08-27 16:27:55,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2021-08-27 16:27:55,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:27:55,824 INFO L681 BuchiCegarLoop]: Abstraction has 129 states and 181 transitions. [2021-08-27 16:27:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2021-08-27 16:27:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-08-27 16:27:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-08-27 16:27:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2021-08-27 16:27:55,834 INFO L704 BuchiCegarLoop]: Abstraction has 107 states and 141 transitions. [2021-08-27 16:27:55,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:27:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 16:27:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 16:27:55,835 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 16:27:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:27:55,893 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-08-27 16:27:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 16:27:55,893 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2021-08-27 16:27:55,895 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:55,896 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2021-08-27 16:27:55,896 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-08-27 16:27:55,896 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2021-08-27 16:27:55,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2021-08-27 16:27:55,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:27:55,897 INFO L681 BuchiCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-08-27 16:27:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2021-08-27 16:27:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-08-27 16:27:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-08-27 16:27:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-08-27 16:27:55,899 INFO L704 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-08-27 16:27:55,899 INFO L587 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-08-27 16:27:55,899 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 16:27:55,900 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2021-08-27 16:27:55,900 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:27:55,900 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:27:55,900 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:27:55,902 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:27:55,902 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-27 16:27:55,902 INFO L791 eck$LassoCheckResult]: Stem: 888#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); 889#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 892#L29 assume !(main_~x~0 > 46); 878#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 880#fibonacciENTRY ~n := #in~n; 881#L17 assume !(~n < 1); 887#L19 assume !(1 == ~n); 877#L22 call #t~ret7 := fibonacci(~n - 1);< 879#fibonacciENTRY ~n := #in~n; 883#L17 assume !(~n < 1); 910#L19 assume !(1 == ~n); 882#L22 call #t~ret7 := fibonacci(~n - 1);< 879#fibonacciENTRY ~n := #in~n; 884#L17 assume !(~n < 1); 894#L19 assume 1 == ~n;#res := 1; 895#fibonacciFINAL assume true; 909#fibonacciEXIT >#34#return; 904#L22-1 call #t~ret8 := fibonacci(~n - 2);< 905#fibonacciENTRY ~n := #in~n; 908#L17 assume ~n < 1;#res := 0; 906#fibonacciFINAL assume true; 903#fibonacciEXIT >#36#return; 902#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 901#fibonacciFINAL assume true; 900#fibonacciEXIT >#34#return; 874#L22-1 [2021-08-27 16:27:55,902 INFO L793 eck$LassoCheckResult]: Loop: 874#L22-1 call #t~ret8 := fibonacci(~n - 2);< 876#fibonacciENTRY ~n := #in~n; 899#L17 assume !(~n < 1); 897#L19 assume !(1 == ~n); 873#L22 call #t~ret7 := fibonacci(~n - 1);< 876#fibonacciENTRY ~n := #in~n; 899#L17 assume !(~n < 1); 897#L19 assume !(1 == ~n); 873#L22 call #t~ret7 := fibonacci(~n - 1);< 876#fibonacciENTRY ~n := #in~n; 899#L17 assume !(~n < 1); 897#L19 assume 1 == ~n;#res := 1; 898#fibonacciFINAL assume true; 907#fibonacciEXIT >#34#return; 872#L22-1 call #t~ret8 := fibonacci(~n - 2);< 875#fibonacciENTRY ~n := #in~n; 885#L17 assume ~n < 1;#res := 0; 886#fibonacciFINAL assume true; 890#fibonacciEXIT >#36#return; 891#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 893#fibonacciFINAL assume true; 896#fibonacciEXIT >#34#return; 874#L22-1 [2021-08-27 16:27:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:55,902 INFO L82 PathProgramCache]: Analyzing trace with hash 506180814, now seen corresponding path program 2 times [2021-08-27 16:27:55,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:55,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034334657] [2021-08-27 16:27:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:55,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:55,912 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:55,920 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 2 times [2021-08-27 16:27:55,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:55,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995145953] [2021-08-27 16:27:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:55,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:55,925 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:55,929 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1200508531, now seen corresponding path program 3 times [2021-08-27 16:27:55,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:55,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803400096] [2021-08-27 16:27:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:55,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:55,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 16:27:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:27:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:27:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:56,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 16:27:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:27:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:27:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-27 16:27:56,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:27:56,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803400096] [2021-08-27 16:27:56,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803400096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:27:56,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009874040] [2021-08-27 16:27:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 16:27:56,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:27:56,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:56,021 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:27:56,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 16:27:56,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-27 16:27:56,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:27:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 16:27:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-08-27 16:27:56,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009874040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:27:56,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:27:56,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-08-27 16:27:56,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571865193] [2021-08-27 16:27:56,540 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:56,540 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:56,540 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:56,540 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:56,540 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:27:56,540 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:56,540 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:56,540 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:56,540 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2021-08-27 16:27:56,540 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:56,541 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:56,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:56,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:56,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:56,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:56,585 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:27:56,585 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:27:56,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:56,590 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:56,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-08-27 16:27:56,591 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:27:56,591 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:56,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-08-27 16:27:56,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:56,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:56,621 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:56,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-08-27 16:27:56,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:27:56,623 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:27:57,195 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:27:57,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-08-27 16:27:57,199 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:57,199 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:57,199 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:57,199 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:57,199 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:27:57,199 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:57,199 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:57,199 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:57,199 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2021-08-27 16:27:57,199 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:57,199 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:57,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:57,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:57,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:57,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:57,246 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:27:57,247 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:27:57,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:57,247 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:57,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-08-27 16:27:57,249 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:27:57,256 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:27:57,256 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:27:57,256 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:27:57,256 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:27:57,256 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:27:57,257 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:27:57,257 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:27:57,259 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:27:57,261 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 16:27:57,261 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 16:27:57,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:57,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:27:57,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-08-27 16:27:57,263 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:27:57,263 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:27:57,263 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:27:57,263 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-08-27 16:27:57,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:57,279 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:27:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 16:27:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:57,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-08-27 16:27:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 16:27:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 16:27:57,819 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-08-27 16:27:57,819 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 16:27:57,889 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-08-27 16:27:57,890 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 [2021-08-27 16:27:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 16:27:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-08-27 16:27:57,890 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-08-27 16:27:57,890 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:57,891 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:27:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 16:27:57,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 16:27:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 16:27:58,377 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-08-27 16:27:58,377 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 16:27:58,458 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-08-27 16:27:58,459 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 [2021-08-27 16:27:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 16:27:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-08-27 16:27:58,460 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-08-27 16:27:58,461 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:58,461 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:27:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 16:27:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 16:27:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 16:27:58,958 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 7 loop predicates [2021-08-27 16:27:58,958 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 16:27:59,170 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 345 states and 444 transitions. Complement of second has 125 states. [2021-08-27 16:27:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-08-27 16:27:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 16:27:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2021-08-27 16:27:59,171 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2021-08-27 16:27:59,172 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:59,172 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2021-08-27 16:27:59,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:59,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2021-08-27 16:27:59,174 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:27:59,174 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2021-08-27 16:27:59,179 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:27:59,183 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2021-08-27 16:27:59,184 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2021-08-27 16:27:59,185 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2021-08-27 16:27:59,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2021-08-27 16:27:59,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:27:59,186 INFO L681 BuchiCegarLoop]: Abstraction has 220 states and 297 transitions. [2021-08-27 16:27:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2021-08-27 16:27:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2021-08-27 16:27:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2021-08-27 16:27:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2021-08-27 16:27:59,202 INFO L704 BuchiCegarLoop]: Abstraction has 172 states and 223 transitions. [2021-08-27 16:27:59,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:27:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 16:27:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-27 16:27:59,204 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 9 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-08-27 16:27:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:27:59,363 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2021-08-27 16:27:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 16:27:59,363 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 273 states and 374 transitions. [2021-08-27 16:27:59,368 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:27:59,377 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 273 states to 272 states and 372 transitions. [2021-08-27 16:27:59,377 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 143 [2021-08-27 16:27:59,378 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 153 [2021-08-27 16:27:59,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 372 transitions. [2021-08-27 16:27:59,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:27:59,379 INFO L681 BuchiCegarLoop]: Abstraction has 272 states and 372 transitions. [2021-08-27 16:27:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states and 372 transitions. [2021-08-27 16:27:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 218. [2021-08-27 16:27:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 140 states have internal predecessors, (151), 47 states have call successors, (55), 28 states have call predecessors, (55), 36 states have return successors, (92), 49 states have call predecessors, (92), 45 states have call successors, (92) [2021-08-27 16:27:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2021-08-27 16:27:59,406 INFO L704 BuchiCegarLoop]: Abstraction has 218 states and 298 transitions. [2021-08-27 16:27:59,406 INFO L587 BuchiCegarLoop]: Abstraction has 218 states and 298 transitions. [2021-08-27 16:27:59,406 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 16:27:59,406 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 218 states and 298 transitions. [2021-08-27 16:27:59,408 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:27:59,408 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:27:59,408 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:27:59,409 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-27 16:27:59,409 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:27:59,410 INFO L791 eck$LassoCheckResult]: Stem: 2661#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); 2662#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 2667#L29 assume !(main_~x~0 > 46); 2668#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 2672#fibonacciENTRY ~n := #in~n; 2707#L17 assume !(~n < 1); 2705#L19 assume !(1 == ~n); 2698#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2706#L17 assume !(~n < 1); 2704#L19 assume !(1 == ~n); 2697#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2706#L17 assume !(~n < 1); 2704#L19 assume !(1 == ~n); 2697#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2706#L17 assume !(~n < 1); 2704#L19 assume !(1 == ~n); 2697#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2708#L17 assume !(~n < 1); 2737#L19 assume 1 == ~n;#res := 1; 2736#fibonacciFINAL assume true; 2734#fibonacciEXIT >#34#return; 2730#L22-1 call #t~ret8 := fibonacci(~n - 2);< 2732#fibonacciENTRY ~n := #in~n; 2743#L17 assume ~n < 1;#res := 0; 2741#fibonacciFINAL assume true; 2729#fibonacciEXIT >#36#return; 2728#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2727#fibonacciFINAL assume true; 2717#fibonacciEXIT >#34#return; 2712#L22-1 call #t~ret8 := fibonacci(~n - 2);< 2716#fibonacciENTRY ~n := #in~n; 2722#L17 assume !(~n < 1); 2720#L19 assume 1 == ~n;#res := 1; 2718#fibonacciFINAL assume true; 2711#fibonacciEXIT >#36#return; 2699#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2702#fibonacciFINAL assume true; 2696#fibonacciEXIT >#34#return; 2656#L22-1 call #t~ret8 := fibonacci(~n - 2);< 2691#fibonacciENTRY ~n := #in~n; 2689#L17 assume !(~n < 1); 2690#L19 assume !(1 == ~n); 2655#L22 call #t~ret7 := fibonacci(~n - 1);< 2658#fibonacciENTRY ~n := #in~n; 2826#L17 assume !(~n < 1); 2827#L19 assume !(1 == ~n); 2804#L22 call #t~ret7 := fibonacci(~n - 1);< 2806#fibonacciENTRY [2021-08-27 16:27:59,410 INFO L793 eck$LassoCheckResult]: Loop: 2806#fibonacciENTRY ~n := #in~n; 2818#L17 assume !(~n < 1); 2816#L19 assume !(1 == ~n); 2805#L22 call #t~ret7 := fibonacci(~n - 1);< 2806#fibonacciENTRY [2021-08-27 16:27:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2139327112, now seen corresponding path program 4 times [2021-08-27 16:27:59,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:59,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182917877] [2021-08-27 16:27:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:59,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 16:27:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:27:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:27:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:27:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:27:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:27:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-27 16:27:59,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:27:59,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182917877] [2021-08-27 16:27:59,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182917877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:27:59,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567789946] [2021-08-27 16:27:59,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 16:27:59,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:27:59,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:27:59,557 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:27:59,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 16:27:59,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 16:27:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:27:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 16:27:59,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:27:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-27 16:27:59,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567789946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:27:59,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:27:59,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-08-27 16:27:59,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132888967] [2021-08-27 16:27:59,927 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:27:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:27:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 2 times [2021-08-27 16:27:59,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:27:59,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098060529] [2021-08-27 16:27:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:27:59,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:27:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:59,931 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:27:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:27:59,932 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:27:59,964 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:27:59,965 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:27:59,965 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:27:59,965 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:27:59,965 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:27:59,965 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:27:59,965 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:27:59,965 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:27:59,965 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2021-08-27 16:27:59,965 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:27:59,965 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:27:59,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:59,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:59,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:59,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:27:59,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:00,002 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:00,002 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:28:00,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,003 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-08-27 16:28:00,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:00,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:00,017 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:00,017 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:00,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-08-27 16:28:00,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,033 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-08-27 16:28:00,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:00,035 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:00,045 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:00,045 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:00,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:00,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,062 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-08-27 16:28:00,063 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:00,064 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:00,071 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:00,071 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:00,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:00,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,087 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-08-27 16:28:00,089 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:00,089 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:00,096 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:00,096 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:00,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:00,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,115 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-08-27 16:28:00,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:00,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:00,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:00,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,144 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-08-27 16:28:00,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:28:00,147 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:00,202 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:28:00,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-08-27 16:28:00,205 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:00,205 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:00,205 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:00,205 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:00,206 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:28:00,206 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,206 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:00,206 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:00,206 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2021-08-27 16:28:00,206 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:00,206 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:00,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:00,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:00,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:00,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:00,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:00,245 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:00,245 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:28:00,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,248 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-08-27 16:28:00,250 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:00,257 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:00,257 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:00,257 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:00,257 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:00,257 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:00,257 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:00,257 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:00,258 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:00,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:00,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,275 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-08-27 16:28:00,277 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:00,283 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:00,283 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:00,283 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:00,283 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:00,283 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:00,284 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:00,284 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:00,292 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:00,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-08-27 16:28:00,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,309 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-08-27 16:28:00,311 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:00,317 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:00,317 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:00,317 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:00,317 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:00,317 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:00,317 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:00,317 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:00,318 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:00,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-08-27 16:28:00,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,336 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-08-27 16:28:00,338 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:00,344 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:00,345 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:00,345 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:00,345 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:00,345 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:00,345 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:00,345 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:00,346 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:00,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-08-27 16:28:00,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,362 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-08-27 16:28:00,366 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:00,373 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:00,373 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:00,373 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:00,373 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:00,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:00,374 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:00,374 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:00,387 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:28:00,389 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:28:00,390 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:28:00,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:00,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:00,391 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:00,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-08-27 16:28:00,392 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:28:00,392 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:28:00,392 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:28:00,392 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-08-27 16:28:00,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2021-08-27 16:28:00,408 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:28:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:00,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 16:28:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:00,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:00,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:28:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:01,025 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 [2021-08-27 16:28:01,025 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:01,079 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 240 states and 323 transitions. Complement of second has 13 states. [2021-08-27 16:28:01,080 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 [2021-08-27 16:28:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-08-27 16:28:01,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 51 letters. Loop has 4 letters. [2021-08-27 16:28:01,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:01,081 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:28:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:01,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 16:28:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:28:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:01,602 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 [2021-08-27 16:28:01,602 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:01,651 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 240 states and 323 transitions. Complement of second has 13 states. [2021-08-27 16:28:01,652 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 [2021-08-27 16:28:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-08-27 16:28:01,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 51 letters. Loop has 4 letters. [2021-08-27 16:28:01,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:01,653 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:28:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 16:28:01,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:28:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:02,243 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 [2021-08-27 16:28:02,243 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:02,323 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 291 states and 376 transitions. Complement of second has 14 states. [2021-08-27 16:28:02,324 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 [2021-08-27 16:28:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2021-08-27 16:28:02,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 51 letters. Loop has 4 letters. [2021-08-27 16:28:02,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:02,325 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 55 letters. Loop has 4 letters. [2021-08-27 16:28:02,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:02,325 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 51 letters. Loop has 8 letters. [2021-08-27 16:28:02,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:02,325 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 291 states and 376 transitions. [2021-08-27 16:28:02,328 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:28:02,330 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 291 states to 236 states and 319 transitions. [2021-08-27 16:28:02,330 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 108 [2021-08-27 16:28:02,330 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 111 [2021-08-27 16:28:02,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 236 states and 319 transitions. [2021-08-27 16:28:02,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:28:02,331 INFO L681 BuchiCegarLoop]: Abstraction has 236 states and 319 transitions. [2021-08-27 16:28:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states and 319 transitions. [2021-08-27 16:28:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-08-27 16:28:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 151 states have internal predecessors, (162), 48 states have call successors, (56), 29 states have call predecessors, (56), 36 states have return successors, (94), 49 states have call predecessors, (94), 46 states have call successors, (94) [2021-08-27 16:28:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 312 transitions. [2021-08-27 16:28:02,337 INFO L704 BuchiCegarLoop]: Abstraction has 230 states and 312 transitions. [2021-08-27 16:28:02,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:28:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 16:28:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-27 16:28:02,338 INFO L87 Difference]: Start difference. First operand 230 states and 312 transitions. Second operand has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-08-27 16:28:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:28:02,459 INFO L93 Difference]: Finished difference Result 415 states and 605 transitions. [2021-08-27 16:28:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 16:28:02,460 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 415 states and 605 transitions. [2021-08-27 16:28:02,464 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:28:02,468 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 415 states to 402 states and 587 transitions. [2021-08-27 16:28:02,468 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 214 [2021-08-27 16:28:02,469 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 224 [2021-08-27 16:28:02,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 587 transitions. [2021-08-27 16:28:02,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:28:02,469 INFO L681 BuchiCegarLoop]: Abstraction has 402 states and 587 transitions. [2021-08-27 16:28:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 587 transitions. [2021-08-27 16:28:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-08-27 16:28:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 182 states have (on average 1.120879120879121) internal successors, (204), 185 states have internal predecessors, (204), 64 states have call successors, (76), 37 states have call predecessors, (76), 46 states have return successors, (146), 69 states have call predecessors, (146), 62 states have call successors, (146) [2021-08-27 16:28:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 426 transitions. [2021-08-27 16:28:02,479 INFO L704 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-08-27 16:28:02,479 INFO L587 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-08-27 16:28:02,480 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-27 16:28:02,480 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 292 states and 426 transitions. [2021-08-27 16:28:02,481 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:28:02,481 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:02,481 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:02,482 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [13, 11, 9, 8, 7, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2021-08-27 16:28:02,483 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:28:02,483 INFO L791 eck$LassoCheckResult]: Stem: 5102#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); 5103#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 5109#L29 assume !(main_~x~0 > 46); 5110#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 5115#fibonacciENTRY ~n := #in~n; 5148#L17 assume !(~n < 1); 5147#L19 assume !(1 == ~n); 5138#L22 call #t~ret7 := fibonacci(~n - 1);< 5146#fibonacciENTRY ~n := #in~n; 5232#L17 assume !(~n < 1); 5231#L19 assume !(1 == ~n); 5140#L22 call #t~ret7 := fibonacci(~n - 1);< 5142#fibonacciENTRY ~n := #in~n; 5267#L17 assume !(~n < 1); 5149#L19 assume !(1 == ~n); 5139#L22 call #t~ret7 := fibonacci(~n - 1);< 5142#fibonacciENTRY ~n := #in~n; 5267#L17 assume !(~n < 1); 5149#L19 assume !(1 == ~n); 5139#L22 call #t~ret7 := fibonacci(~n - 1);< 5142#fibonacciENTRY ~n := #in~n; 5266#L17 assume !(~n < 1); 5265#L19 assume 1 == ~n;#res := 1; 5263#fibonacciFINAL assume true; 5260#fibonacciEXIT >#34#return; 5257#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5258#fibonacciENTRY ~n := #in~n; 5264#L17 assume ~n < 1;#res := 0; 5262#fibonacciFINAL assume true; 5256#fibonacciEXIT >#36#return; 5238#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5234#fibonacciFINAL assume true; 5230#fibonacciEXIT >#34#return; 5183#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5186#fibonacciENTRY ~n := #in~n; 5217#L17 assume !(~n < 1); 5214#L19 assume 1 == ~n;#res := 1; 5121#fibonacciFINAL assume true; 5182#fibonacciEXIT >#36#return; 5172#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5170#fibonacciFINAL assume true; 5165#fibonacciEXIT >#34#return; 5163#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5167#fibonacciENTRY ~n := #in~n; 5216#L17 assume !(~n < 1); 5215#L19 assume !(1 == ~n); 5210#L22 call #t~ret7 := fibonacci(~n - 1);< 5211#fibonacciENTRY ~n := #in~n; 5301#L17 assume !(~n < 1); 5213#L19 assume 1 == ~n;#res := 1; 5212#fibonacciFINAL assume true; 5209#fibonacciEXIT >#34#return; 5176#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5181#fibonacciENTRY ~n := #in~n; 5208#L17 assume ~n < 1;#res := 0; 5207#fibonacciFINAL assume true; 5173#fibonacciEXIT >#36#return; 5179#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5168#fibonacciFINAL assume true; 5162#fibonacciEXIT >#36#return; 5141#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5144#fibonacciFINAL assume true; 5137#fibonacciEXIT >#34#return; 5119#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5131#fibonacciENTRY ~n := #in~n; 5132#L17 assume !(~n < 1); 5118#L19 assume !(1 == ~n); 5096#L22 call #t~ret7 := fibonacci(~n - 1);< 5306#fibonacciENTRY ~n := #in~n; 5094#L17 assume !(~n < 1); 5097#L19 assume !(1 == ~n); 5087#L22 call #t~ret7 := fibonacci(~n - 1);< 5085#fibonacciENTRY ~n := #in~n; 5089#L17 assume !(~n < 1); 5340#L19 assume !(1 == ~n); 5086#L22 [2021-08-27 16:28:02,483 INFO L793 eck$LassoCheckResult]: Loop: 5086#L22 call #t~ret7 := fibonacci(~n - 1);< 5085#fibonacciENTRY ~n := #in~n; 5089#L17 assume !(~n < 1); 5340#L19 assume !(1 == ~n); 5086#L22 [2021-08-27 16:28:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:02,483 INFO L82 PathProgramCache]: Analyzing trace with hash -652780395, now seen corresponding path program 5 times [2021-08-27 16:28:02,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:02,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004484291] [2021-08-27 16:28:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:02,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 16:28:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:28:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:28:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:28:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:28:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:28:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 16:28:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:28:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:28:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 103 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-27 16:28:02,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:28:02,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004484291] [2021-08-27 16:28:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004484291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:28:02,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9002619] [2021-08-27 16:28:02,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 16:28:02,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:28:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:02,642 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:28:02,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-27 16:28:03,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-27 16:28:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:28:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 16:28:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 108 proven. 109 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-08-27 16:28:03,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9002619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:28:03,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:28:03,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-08-27 16:28:03,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18928093] [2021-08-27 16:28:03,316 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:28:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1906756, now seen corresponding path program 3 times [2021-08-27 16:28:03,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:03,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448436663] [2021-08-27 16:28:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:03,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:03,322 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:03,323 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:03,375 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:03,375 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:03,375 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:03,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:03,376 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:28:03,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:03,376 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:03,376 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:03,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration6_Loop [2021-08-27 16:28:03,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:03,376 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:03,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:03,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:03,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:03,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:03,420 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:03,421 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:28:03,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:03,425 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:03,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:03,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:03,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-08-27 16:28:03,449 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:03,449 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:03,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:03,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:03,472 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:03,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-08-27 16:28:03,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:03,475 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:03,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:03,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:03,527 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:03,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-08-27 16:28:03,549 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:28:03,549 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:07,967 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:28:07,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-08-27 16:28:07,971 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:07,972 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:07,972 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:07,972 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:07,972 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:28:07,972 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:07,972 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:07,972 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:07,972 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration6_Loop [2021-08-27 16:28:07,972 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:07,972 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:07,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:07,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:07,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:07,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:08,019 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:08,019 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:28:08,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:08,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:08,020 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-08-27 16:28:08,022 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:08,028 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:08,028 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:08,028 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:08,028 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:08,028 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:08,028 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:08,028 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:08,029 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:08,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Ended with exit code 0 [2021-08-27 16:28:08,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:08,047 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:08,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-08-27 16:28:08,049 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:08,054 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:08,054 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:08,054 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:08,054 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:08,055 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:08,055 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:08,055 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:08,056 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:08,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2021-08-27 16:28:08,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:08,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:08,071 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:08,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-08-27 16:28:08,073 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:08,078 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:08,078 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:08,079 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:08,079 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:08,079 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:08,079 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:08,079 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:08,080 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:08,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:08,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:08,096 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:08,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-08-27 16:28:08,098 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:08,104 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:08,104 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:08,104 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:08,104 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:08,104 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:08,105 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:08,105 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:08,125 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:28:08,138 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:28:08,138 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:28:08,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:08,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:08,147 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:08,148 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:28:08,148 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:28:08,148 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:28:08,148 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-08-27 16:28:08,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-08-27 16:28:08,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:08,164 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:28:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:08,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2021-08-27 16:28:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:08,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 16:28:08,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:28:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:09,167 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 [2021-08-27 16:28:09,167 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:09,210 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 301 states and 436 transitions. Complement of second has 18 states. [2021-08-27 16:28:09,221 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 [2021-08-27 16:28:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 14 transitions. [2021-08-27 16:28:09,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 14 transitions. Stem has 75 letters. Loop has 4 letters. [2021-08-27 16:28:09,223 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:09,223 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:28:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 16:28:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:28:10,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:10,227 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 [2021-08-27 16:28:10,228 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:10,300 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 307 states and 442 transitions. Complement of second has 17 states. [2021-08-27 16:28:10,301 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 [2021-08-27 16:28:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2021-08-27 16:28:10,301 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 75 letters. Loop has 4 letters. [2021-08-27 16:28:10,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:10,302 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:28:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 16:28:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:11,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:28:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:11,346 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 [2021-08-27 16:28:11,346 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:11,405 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 354 states and 504 transitions. Complement of second has 27 states. [2021-08-27 16:28:11,406 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 [2021-08-27 16:28:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:28:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 23 transitions. [2021-08-27 16:28:11,406 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 75 letters. Loop has 4 letters. [2021-08-27 16:28:11,407 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:11,407 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 79 letters. Loop has 4 letters. [2021-08-27 16:28:11,407 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:11,407 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 75 letters. Loop has 8 letters. [2021-08-27 16:28:11,408 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:11,408 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 354 states and 504 transitions. [2021-08-27 16:28:11,410 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:28:11,413 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 354 states to 292 states and 426 transitions. [2021-08-27 16:28:11,413 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 136 [2021-08-27 16:28:11,413 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 149 [2021-08-27 16:28:11,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 426 transitions. [2021-08-27 16:28:11,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:28:11,413 INFO L681 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-08-27 16:28:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 426 transitions. [2021-08-27 16:28:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-08-27 16:28:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 182 states have (on average 1.120879120879121) internal successors, (204), 185 states have internal predecessors, (204), 64 states have call successors, (76), 37 states have call predecessors, (76), 46 states have return successors, (146), 69 states have call predecessors, (146), 62 states have call successors, (146) [2021-08-27 16:28:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 426 transitions. [2021-08-27 16:28:11,420 INFO L704 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-08-27 16:28:11,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:28:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 16:28:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-27 16:28:11,421 INFO L87 Difference]: Start difference. First operand 292 states and 426 transitions. Second operand has 17 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2021-08-27 16:28:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:28:11,594 INFO L93 Difference]: Finished difference Result 417 states and 613 transitions. [2021-08-27 16:28:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 16:28:11,594 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 417 states and 613 transitions. [2021-08-27 16:28:11,597 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:28:11,597 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 417 states to 0 states and 0 transitions. [2021-08-27 16:28:11,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 16:28:11,598 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 16:28:11,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 16:28:11,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:28:11,598 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:28:11,598 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:28:11,598 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:28:11,598 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-08-27 16:28:11,598 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 16:28:11,598 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:28:11,598 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 16:28:11,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 04:28:11 BoogieIcfgContainer [2021-08-27 16:28:11,604 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 16:28:11,604 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 16:28:11,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 16:28:11,605 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 16:28:11,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:27:51" (3/4) ... [2021-08-27 16:28:11,607 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 16:28:11,607 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 16:28:11,608 INFO L168 Benchmark]: Toolchain (without parser) took 20287.68 ms. Allocated memory was 56.6 MB in the beginning and 283.1 MB in the end (delta: 226.5 MB). Free memory was 36.0 MB in the beginning and 182.1 MB in the end (delta: -146.1 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:11,608 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.8 MB in the beginning and 38.7 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:28:11,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.36 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 26.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:11,609 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.84 ms. Allocated memory is still 56.6 MB. Free memory was 26.6 MB in the beginning and 40.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:11,609 INFO L168 Benchmark]: Boogie Preprocessor took 27.44 ms. Allocated memory is still 56.6 MB. Free memory was 40.8 MB in the beginning and 39.8 MB in the end (delta: 983.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:28:11,609 INFO L168 Benchmark]: RCFGBuilder took 269.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.8 MB in the beginning and 28.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:11,609 INFO L168 Benchmark]: BuchiAutomizer took 19809.65 ms. Allocated memory was 56.6 MB in the beginning and 283.1 MB in the end (delta: 226.5 MB). Free memory was 27.9 MB in the beginning and 182.1 MB in the end (delta: -154.2 MB). Peak memory consumption was 73.2 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:11,610 INFO L168 Benchmark]: Witness Printer took 2.43 ms. Allocated memory is still 283.1 MB. Free memory is still 182.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:28:11,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.8 MB in the beginning and 38.7 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 127.36 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 26.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.84 ms. Allocated memory is still 56.6 MB. Free memory was 26.6 MB in the beginning and 40.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.44 ms. Allocated memory is still 56.6 MB. Free memory was 40.8 MB in the beginning and 39.8 MB in the end (delta: 983.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 269.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.8 MB in the beginning and 28.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 19809.65 ms. Allocated memory was 56.6 MB in the beginning and 283.1 MB in the end (delta: 226.5 MB). Free memory was 27.9 MB in the beginning and 182.1 MB in the end (delta: -154.2 MB). Peak memory consumption was 73.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.43 ms. Allocated memory is still 283.1 MB. Free memory is still 182.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 10 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. 5 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 19.7s and 7 iterations. TraceHistogramMax:13. Analysis of lassos took 10.9s. Construction of modules took 0.6s. Büchi inclusion checks took 7.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 91.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 248 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 292 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 206 SDtfs, 489 SDslu, 268 SDs, 0 SdLazy, 808 SolverSat, 318 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 625.5ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI1 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf94 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp75 dnf100 smp100 tf110 neg96 sie109 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: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 16:28:11,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:11,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:12,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-27 16:28:12,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 16:28:12,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...