./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version ff03de63 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/Fibonacci02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 22:36:08,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 22:36:08,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 22:36:08,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 22:36:08,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 22:36:08,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 22:36:08,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 22:36:08,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 22:36:08,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 22:36:08,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 22:36:08,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 22:36:08,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 22:36:08,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 22:36:08,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 22:36:08,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 22:36:08,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 22:36:08,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 22:36:08,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 22:36:08,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 22:36:08,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 22:36:08,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 22:36:08,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 22:36:08,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 22:36:08,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 22:36:08,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 22:36:08,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 22:36:08,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 22:36:08,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 22:36:08,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 22:36:08,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 22:36:08,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 22:36:08,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 22:36:08,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 22:36:08,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 22:36:08,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 22:36:08,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 22:36:08,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 22:36:08,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 22:36:08,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 22:36:08,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 22:36:08,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 22:36:08,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-21 22:36:08,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 22:36:08,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 22:36:08,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 22:36:08,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 22:36:08,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 22:36:08,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 22:36:08,325 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 22:36:08,325 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-21 22:36:08,325 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-21 22:36:08,325 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-21 22:36:08,326 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-21 22:36:08,326 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-21 22:36:08,326 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-21 22:36:08,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 22:36:08,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 22:36:08,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 22:36:08,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 22:36:08,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 22:36:08,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 22:36:08,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-21 22:36:08,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-21 22:36:08,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-21 22:36:08,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 22:36:08,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 22:36:08,329 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-21 22:36:08,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 22:36:08,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-21 22:36:08,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 22:36:08,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 22:36:08,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 22:36:08,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 22:36:08,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 22:36:08,331 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-21 22:36:08,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2021-12-21 22:36:08,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 22:36:08,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 22:36:08,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 22:36:08,573 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 22:36:08,574 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 22:36:08,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci02.c [2021-12-21 22:36:08,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af598bc19/55b727b8572d4e29ac1b0231338d9f78/FLAG74c2f6e95 [2021-12-21 22:36:08,958 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 22:36:08,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c [2021-12-21 22:36:08,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af598bc19/55b727b8572d4e29ac1b0231338d9f78/FLAG74c2f6e95 [2021-12-21 22:36:08,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af598bc19/55b727b8572d4e29ac1b0231338d9f78 [2021-12-21 22:36:08,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 22:36:08,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 22:36:08,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 22:36:08,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 22:36:08,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 22:36:08,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:36:08" (1/1) ... [2021-12-21 22:36:08,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326f57a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:08, skipping insertion in model container [2021-12-21 22:36:08,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:36:08" (1/1) ... [2021-12-21 22:36:08,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 22:36:08,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 22:36:09,174 WARN L230 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/Fibonacci02.c[715,728] [2021-12-21 22:36:09,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 22:36:09,186 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 22:36:09,197 WARN L230 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/Fibonacci02.c[715,728] [2021-12-21 22:36:09,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 22:36:09,210 INFO L208 MainTranslator]: Completed translation [2021-12-21 22:36:09,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09 WrapperNode [2021-12-21 22:36:09,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 22:36:09,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 22:36:09,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 22:36:09,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 22:36:09,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,237 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-21 22:36:09,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 22:36:09,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 22:36:09,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 22:36:09,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 22:36:09,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 22:36:09,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 22:36:09,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 22:36:09,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 22:36:09,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (1/1) ... [2021-12-21 22:36:09,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:09,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:09,281 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) [2021-12-21 22:36:09,298 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 [2021-12-21 22:36:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-12-21 22:36:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-12-21 22:36:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 22:36:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 22:36:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 22:36:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 22:36:09,351 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 22:36:09,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 22:36:09,447 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 22:36:09,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 22:36:09,453 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 22:36:09,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:36:09 BoogieIcfgContainer [2021-12-21 22:36:09,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 22:36:09,455 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-21 22:36:09,456 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-21 22:36:09,458 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-21 22:36:09,459 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:36:09,459 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.12 10:36:08" (1/3) ... [2021-12-21 22:36:09,460 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@360d6bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 10:36:09, skipping insertion in model container [2021-12-21 22:36:09,460 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:36:09,460 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:09" (2/3) ... [2021-12-21 22:36:09,460 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@360d6bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 10:36:09, skipping insertion in model container [2021-12-21 22:36:09,460 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:36:09,460 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:36:09" (3/3) ... [2021-12-21 22:36:09,462 INFO L388 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2021-12-21 22:36:09,535 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-21 22:36:09,550 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-21 22:36:09,550 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-21 22:36:09,550 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-21 22:36:09,550 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-21 22:36:09,550 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-21 22:36:09,551 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-21 22:36:09,551 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-21 22:36:09,560 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-12-21 22:36:09,573 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:09,584 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:09,585 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:09,592 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-21 22:36:09,592 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:09,592 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-21 22:36:09,593 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-12-21 22:36:09,595 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:09,596 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:09,596 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:09,596 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-21 22:36:09,597 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:09,602 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 15#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 11#L29true call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 5#fibonacciENTRYtrue [2021-12-21 22:36:09,603 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 17#L22true call #t~ret4 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-12-21 22:36:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2021-12-21 22:36:09,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:09,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534176472] [2021-12-21 22:36:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:09,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:09,692 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:09,724 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2021-12-21 22:36:09,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200636221] [2021-12-21 22:36:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:09,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:09,732 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:09,736 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2021-12-21 22:36:09,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:09,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734573998] [2021-12-21 22:36:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:09,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:09,746 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:09,756 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:09,864 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:09,865 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:09,865 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:09,865 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:09,865 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:09,866 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:09,866 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:09,866 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:09,866 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-12-21 22:36:09,866 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:09,866 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:09,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:09,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:09,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:09,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:09,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:09,933 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:09,934 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:09,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:09,963 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) [2021-12-21 22:36:09,987 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 [2021-12-21 22:36:09,988 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:09,988 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:10,026 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:10,026 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:10,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-12-21 22:36:10,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,084 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) [2021-12-21 22:36:10,095 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 [2021-12-21 22:36:10,096 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:10,096 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:10,115 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:10,115 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:10,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-12-21 22:36:10,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,135 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) [2021-12-21 22:36:10,154 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 [2021-12-21 22:36:10,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:10,154 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:10,179 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:10,179 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:10,195 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 [2021-12-21 22:36:10,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,197 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) [2021-12-21 22:36:10,198 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 [2021-12-21 22:36:10,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:10,199 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:10,240 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 [2021-12-21 22:36:10,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,242 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) [2021-12-21 22:36:10,244 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 [2021-12-21 22:36:10,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:10,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:10,299 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:10,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-12-21 22:36:10,303 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:10,303 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:10,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:10,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:10,304 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:10,304 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,304 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:10,304 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:10,304 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-12-21 22:36:10,304 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:10,304 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:10,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:10,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:10,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:10,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:10,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:10,367 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:10,370 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:10,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,381 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) [2021-12-21 22:36:10,382 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 [2021-12-21 22:36:10,383 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 [2021-12-21 22:36:10,390 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:10,390 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:10,391 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:10,391 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:10,391 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:10,392 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:10,392 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:10,412 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:10,431 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 [2021-12-21 22:36:10,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,433 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) [2021-12-21 22:36:10,435 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 [2021-12-21 22:36:10,436 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 [2021-12-21 22:36:10,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:10,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:10,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:10,443 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:10,443 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:10,443 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:10,443 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:10,445 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:10,463 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 [2021-12-21 22:36:10,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,465 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) [2021-12-21 22:36:10,466 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 [2021-12-21 22:36:10,467 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 [2021-12-21 22:36:10,475 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:10,475 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:10,475 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:10,475 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:10,475 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:10,483 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:10,483 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:10,498 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:10,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:10,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,516 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) [2021-12-21 22:36:10,517 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 [2021-12-21 22:36:10,547 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 [2021-12-21 22:36:10,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:10,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:10,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:10,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:10,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:10,556 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:10,556 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:10,559 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:10,562 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:10,562 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:10,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:10,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:10,564 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) [2021-12-21 22:36:10,566 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 [2021-12-21 22:36:10,567 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:10,567 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:10,567 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:10,567 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-21 22:36:10,584 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 [2021-12-21 22:36:10,592 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:10,606 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 [2021-12-21 22:36:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 22:36:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:10,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:10,808 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 [2021-12-21 22:36:10,809 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-21 22:36:10,950 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 47 states and 59 transitions. Complement of second has 12 states. [2021-12-21 22:36:10,952 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 [2021-12-21 22:36:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-21 22:36:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-12-21 22:36:10,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-21 22:36:10,961 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:10,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-21 22:36:10,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:10,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-21 22:36:10,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:10,963 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-12-21 22:36:10,973 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:10,978 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2021-12-21 22:36:10,979 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-21 22:36:10,980 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-21 22:36:10,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-12-21 22:36:10,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:10,981 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-21 22:36:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-12-21 22:36:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-12-21 22:36:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-12-21 22:36:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-21 22:36:11,010 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-21 22:36:11,011 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-21 22:36:11,011 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-21 22:36:11,011 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-12-21 22:36:11,012 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:11,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:11,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:11,013 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:11,013 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:11,013 INFO L791 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 133#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 122#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 131#fibonacciENTRY ~n := #in~n; 128#L17 assume !(~n < 1); 129#L19 assume !(1 == ~n); 121#L22 call #t~ret4 := fibonacci(~n - 1);< 130#fibonacciENTRY ~n := #in~n; 125#L17 assume ~n < 1;#res := 0; 126#fibonacciFINAL assume true; 134#fibonacciEXIT >#29#return; 120#L22-1 [2021-12-21 22:36:11,014 INFO L793 eck$LassoCheckResult]: Loop: 120#L22-1 call #t~ret5 := fibonacci(~n - 2);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume !(~n < 1); 138#L19 assume !(1 == ~n); 123#L22 call #t~ret4 := fibonacci(~n - 1);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume ~n < 1;#res := 0; 136#fibonacciFINAL assume true; 137#fibonacciEXIT >#29#return; 120#L22-1 [2021-12-21 22:36:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2021-12-21 22:36:11,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:11,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749414074] [2021-12-21 22:36:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:11,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 22:36:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 22:36:11,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:11,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749414074] [2021-12-21 22:36:11,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749414074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:36:11,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:36:11,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 22:36:11,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351337418] [2021-12-21 22:36:11,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:36:11,117 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2021-12-21 22:36:11,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:11,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446369477] [2021-12-21 22:36:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 22:36:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 22:36:11,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:11,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446369477] [2021-12-21 22:36:11,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446369477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:36:11,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:36:11,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 22:36:11,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023021182] [2021-12-21 22:36:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:36:11,176 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 22:36:11,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 22:36:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 22:36:11,179 INFO L87 Difference]: Start difference. First operand 20 states and 26 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) [2021-12-21 22:36:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:11,234 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-21 22:36:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 22:36:11,235 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-12-21 22:36:11,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:11,245 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-12-21 22:36:11,245 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-12-21 22:36:11,246 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-12-21 22:36:11,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-12-21 22:36:11,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:11,246 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-21 22:36:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-12-21 22:36:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-21 22:36:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 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) [2021-12-21 22:36:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-21 22:36:11,253 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-21 22:36:11,253 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-21 22:36:11,253 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-21 22:36:11,253 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-12-21 22:36:11,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:11,255 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:11,255 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:11,256 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:11,256 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:11,256 INFO L791 eck$LassoCheckResult]: Stem: 204#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 205#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 194#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 208#fibonacciENTRY ~n := #in~n; 200#L17 assume !(~n < 1); 203#L19 assume !(1 == ~n); 195#L22 call #t~ret4 := fibonacci(~n - 1);< 199#fibonacciENTRY ~n := #in~n; 201#L17 assume !(~n < 1); 202#L19 assume 1 == ~n;#res := 1; 216#fibonacciFINAL assume true; 215#fibonacciEXIT >#29#return; 193#L22-1 [2021-12-21 22:36:11,256 INFO L793 eck$LassoCheckResult]: Loop: 193#L22-1 call #t~ret5 := fibonacci(~n - 2);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume !(1 == ~n); 196#L22 call #t~ret4 := fibonacci(~n - 1);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 211#fibonacciFINAL assume true; 213#fibonacciEXIT >#29#return; 193#L22-1 [2021-12-21 22:36:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2021-12-21 22:36:11,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:11,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432998087] [2021-12-21 22:36:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:11,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 22:36:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:11,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432998087] [2021-12-21 22:36:11,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432998087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:11,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810922895] [2021-12-21 22:36:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:11,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:11,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 22:36:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:11,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 22:36:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:11,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:11,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810922895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:11,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:11,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-21 22:36:11,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212816041] [2021-12-21 22:36:11,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:11,488 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2021-12-21 22:36:11,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091764657] [2021-12-21 22:36:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:11,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:11,493 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:11,496 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:11,585 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:11,585 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:11,585 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:11,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:11,585 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:11,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:11,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:11,587 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:11,587 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-12-21 22:36:11,587 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:11,587 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:11,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:11,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:11,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:11,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:11,623 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:11,623 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:11,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:11,624 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) [2021-12-21 22:36:11,625 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 [2021-12-21 22:36:11,627 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:11,627 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:11,647 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:11,647 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:11,663 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 [2021-12-21 22:36:11,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:11,664 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2021-12-21 22:36:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-21 22:36:11,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:11,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:11,739 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:11,739 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:11,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:11,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:11,758 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) [2021-12-21 22:36:11,759 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 [2021-12-21 22:36:11,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:11,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:11,781 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:11,781 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:11,799 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 [2021-12-21 22:36:11,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:11,805 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) [2021-12-21 22:36:11,806 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 [2021-12-21 22:36:11,808 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:11,808 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:11,848 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 [2021-12-21 22:36:11,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:11,850 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) [2021-12-21 22:36:11,851 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 [2021-12-21 22:36:11,854 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:11,854 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:12,175 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:12,180 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 [2021-12-21 22:36:12,180 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:12,180 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:12,180 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:12,180 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:12,180 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:12,180 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:12,180 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:12,180 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:12,180 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-12-21 22:36:12,180 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:12,180 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:12,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:12,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:12,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:12,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:12,222 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:12,222 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:12,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:12,224 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) [2021-12-21 22:36:12,225 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 [2021-12-21 22:36:12,226 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 [2021-12-21 22:36:12,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:12,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:12,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:12,233 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:12,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:12,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:12,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:12,248 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:12,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:12,268 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) [2021-12-21 22:36:12,268 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 [2021-12-21 22:36:12,301 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 [2021-12-21 22:36:12,308 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:12,308 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:12,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:12,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:12,308 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:12,309 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:12,309 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:12,312 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:12,330 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 [2021-12-21 22:36:12,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:12,331 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) [2021-12-21 22:36:12,337 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 [2021-12-21 22:36:12,338 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 [2021-12-21 22:36:12,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:12,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:12,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:12,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:12,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:12,344 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:12,344 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:12,349 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:12,366 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 [2021-12-21 22:36:12,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:12,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:12,368 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) [2021-12-21 22:36:12,369 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 [2021-12-21 22:36:12,370 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 [2021-12-21 22:36:12,378 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:12,378 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:12,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:12,378 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:12,378 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:12,380 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:12,380 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:12,393 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:12,396 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:12,396 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:12,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:12,399 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) [2021-12-21 22:36:12,400 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 [2021-12-21 22:36:12,401 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:12,401 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:12,401 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:12,401 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-21 22:36:12,425 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 [2021-12-21 22:36:12,426 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 22:36:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 22:36:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:12,614 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-21 22:36:12,614 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 22:36:12,756 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-12-21 22:36:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 22:36:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-21 22:36:12,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-12-21 22:36:12,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:12,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-12-21 22:36:12,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:12,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-12-21 22:36:12,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:12,759 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-12-21 22:36:12,762 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-21 22:36:12,765 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-12-21 22:36:12,765 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-12-21 22:36:12,766 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-12-21 22:36:12,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-12-21 22:36:12,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:12,766 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-12-21 22:36:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-12-21 22:36:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-21 22:36:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-12-21 22:36:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-12-21 22:36:12,807 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-12-21 22:36:12,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 22:36:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 22:36:12,808 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 22:36:12,826 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 [2021-12-21 22:36:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:12,902 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2021-12-21 22:36:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 22:36:12,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2021-12-21 22:36:12,905 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-21 22:36:12,907 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2021-12-21 22:36:12,907 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-12-21 22:36:12,907 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-12-21 22:36:12,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2021-12-21 22:36:12,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:12,908 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2021-12-21 22:36:12,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2021-12-21 22:36:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-12-21 22:36:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-21 22:36:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-21 22:36:12,914 INFO L704 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-21 22:36:12,914 INFO L587 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-21 22:36:12,915 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-21 22:36:12,915 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2021-12-21 22:36:12,916 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-21 22:36:12,916 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:12,916 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:12,917 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:12,917 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:12,917 INFO L791 eck$LassoCheckResult]: Stem: 805#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 806#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 788#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 814#fibonacciENTRY ~n := #in~n; 799#L17 assume !(~n < 1); 800#L19 assume !(1 == ~n); 795#L22 call #t~ret4 := fibonacci(~n - 1);< 794#fibonacciENTRY ~n := #in~n; 796#L17 assume !(~n < 1); 852#L19 assume !(1 == ~n); 803#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 851#L17 assume !(~n < 1); 849#L19 assume 1 == ~n;#res := 1; 847#fibonacciFINAL assume true; 846#fibonacciEXIT >#29#return; 791#L22-1 call #t~ret5 := fibonacci(~n - 2);< 844#fibonacciENTRY ~n := #in~n; 797#L17 assume ~n < 1;#res := 0; 798#fibonacciFINAL assume true; 888#fibonacciEXIT >#31#return; 887#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 885#fibonacciFINAL assume true; 877#fibonacciEXIT >#29#return; 819#L22-1 [2021-12-21 22:36:12,917 INFO L793 eck$LassoCheckResult]: Loop: 819#L22-1 call #t~ret5 := fibonacci(~n - 2);< 802#fibonacciENTRY ~n := #in~n; 882#L17 assume !(~n < 1); 818#L19 assume !(1 == ~n); 821#L22 call #t~ret4 := fibonacci(~n - 1);< 802#fibonacciENTRY ~n := #in~n; 882#L17 assume !(~n < 1); 818#L19 assume 1 == ~n;#res := 1; 822#fibonacciFINAL assume true; 874#fibonacciEXIT >#29#return; 819#L22-1 [2021-12-21 22:36:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 1 times [2021-12-21 22:36:12,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:12,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419361853] [2021-12-21 22:36:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:12,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 22:36:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:12,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 22:36:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 22:36:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 22:36:13,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:13,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419361853] [2021-12-21 22:36:13,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419361853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:13,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388388494] [2021-12-21 22:36:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:13,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:13,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:13,004 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:13,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 22:36:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:13,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 22:36:13,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 22:36:13,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 22:36:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388388494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:13,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:13,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2021-12-21 22:36:13,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725107156] [2021-12-21 22:36:13,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:13,293 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:13,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 2 times [2021-12-21 22:36:13,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327839259] [2021-12-21 22:36:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:13,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:13,297 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:13,299 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:13,382 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:13,382 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:13,383 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:13,383 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:13,383 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:13,383 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,383 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:13,383 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:13,383 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2021-12-21 22:36:13,383 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:13,383 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:13,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,410 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:13,410 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:13,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:13,412 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2021-12-21 22:36:13,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-21 22:36:13,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:13,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:13,449 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:13,449 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:13,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-12-21 22:36:13,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:13,484 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) [2021-12-21 22:36:13,485 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 [2021-12-21 22:36:13,486 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:13,486 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:13,507 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:13,507 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:13,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:13,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:13,540 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) [2021-12-21 22:36:13,540 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 [2021-12-21 22:36:13,542 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:13,542 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:13,562 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:13,562 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:13,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:13,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:13,582 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) [2021-12-21 22:36:13,583 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 [2021-12-21 22:36:13,584 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:13,584 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:13,626 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 [2021-12-21 22:36:13,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:13,627 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) [2021-12-21 22:36:13,628 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 [2021-12-21 22:36:13,630 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:13,630 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:13,948 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:13,958 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 [2021-12-21 22:36:13,958 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:13,958 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:13,958 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:13,958 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:13,958 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:13,958 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,958 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:13,958 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:13,958 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2021-12-21 22:36:13,958 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:13,958 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:13,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:13,990 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:13,990 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:13,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:13,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:14,008 INFO L229 MonitoredProcess]: Starting monitored process 29 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) [2021-12-21 22:36:14,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-21 22:36:14,010 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 [2021-12-21 22:36:14,015 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:14,016 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:14,016 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:14,016 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:14,016 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:14,016 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:14,016 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:14,025 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:14,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:14,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:14,045 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) [2021-12-21 22:36:14,046 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 [2021-12-21 22:36:14,048 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 [2021-12-21 22:36:14,054 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:14,054 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:14,054 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:14,054 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:14,054 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:14,055 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:14,055 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:14,065 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:14,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:14,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:14,083 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) [2021-12-21 22:36:14,084 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 [2021-12-21 22:36:14,085 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 [2021-12-21 22:36:14,092 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:14,092 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:14,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:14,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:14,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:14,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:14,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:14,097 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:14,114 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 [2021-12-21 22:36:14,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:14,116 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) [2021-12-21 22:36:14,117 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 [2021-12-21 22:36:14,176 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 [2021-12-21 22:36:14,182 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:14,182 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:14,182 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:14,182 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:14,182 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:14,183 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:14,183 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:14,197 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:14,199 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:14,199 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:14,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:14,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:14,201 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) [2021-12-21 22:36:14,202 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 [2021-12-21 22:36:14,202 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:14,203 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:14,203 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:14,203 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-21 22:36:14,231 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 [2021-12-21 22:36:14,232 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:14,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 22:36:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:14,479 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 [2021-12-21 22:36:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 22:36:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:14,574 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-21 22:36:14,574 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:14,704 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Result 175 states and 233 transitions. Complement of second has 33 states. [2021-12-21 22:36:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-21 22:36:14,707 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 32 letters. Loop has 10 letters. [2021-12-21 22:36:14,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:14,707 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:14,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 22:36:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 22:36:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:15,032 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-21 22:36:15,032 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:15,133 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Result 300 states and 403 transitions. Complement of second has 25 states. [2021-12-21 22:36:15,135 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 [2021-12-21 22:36:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-12-21 22:36:15,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 10 letters. [2021-12-21 22:36:15,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:15,136 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 22:36:15,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 22:36:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:15,455 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-21 22:36:15,455 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:15,608 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Result 858 states and 1136 transitions. Complement of second has 130 states. [2021-12-21 22:36:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2021-12-21 22:36:15,610 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 10 letters. [2021-12-21 22:36:15,610 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:15,610 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 42 letters. Loop has 10 letters. [2021-12-21 22:36:15,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:15,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 20 letters. [2021-12-21 22:36:15,612 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:15,612 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 858 states and 1136 transitions. [2021-12-21 22:36:15,621 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2021-12-21 22:36:15,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 858 states to 430 states and 620 transitions. [2021-12-21 22:36:15,628 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 163 [2021-12-21 22:36:15,628 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 188 [2021-12-21 22:36:15,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 430 states and 620 transitions. [2021-12-21 22:36:15,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:15,628 INFO L681 BuchiCegarLoop]: Abstraction has 430 states and 620 transitions. [2021-12-21 22:36:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states and 620 transitions. [2021-12-21 22:36:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 352. [2021-12-21 22:36:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 221 states have (on average 1.1990950226244343) internal successors, (265), 235 states have internal predecessors, (265), 75 states have call successors, (84), 46 states have call predecessors, (84), 56 states have return successors, (136), 70 states have call predecessors, (136), 71 states have call successors, (136) [2021-12-21 22:36:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 485 transitions. [2021-12-21 22:36:15,649 INFO L704 BuchiCegarLoop]: Abstraction has 352 states and 485 transitions. [2021-12-21 22:36:15,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 22:36:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-12-21 22:36:15,650 INFO L87 Difference]: Start difference. First operand 352 states and 485 transitions. Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 22:36:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:15,912 INFO L93 Difference]: Finished difference Result 683 states and 994 transitions. [2021-12-21 22:36:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 22:36:15,913 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 683 states and 994 transitions. [2021-12-21 22:36:15,920 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:15,926 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 683 states to 652 states and 949 transitions. [2021-12-21 22:36:15,927 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 282 [2021-12-21 22:36:15,927 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 285 [2021-12-21 22:36:15,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 949 transitions. [2021-12-21 22:36:15,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:15,928 INFO L681 BuchiCegarLoop]: Abstraction has 652 states and 949 transitions. [2021-12-21 22:36:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 949 transitions. [2021-12-21 22:36:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 622. [2021-12-21 22:36:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 380 states have (on average 1.1631578947368422) internal successors, (442), 400 states have internal predecessors, (442), 151 states have call successors, (165), 76 states have call predecessors, (165), 91 states have return successors, (305), 145 states have call predecessors, (305), 141 states have call successors, (305) [2021-12-21 22:36:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 912 transitions. [2021-12-21 22:36:15,947 INFO L704 BuchiCegarLoop]: Abstraction has 622 states and 912 transitions. [2021-12-21 22:36:15,947 INFO L587 BuchiCegarLoop]: Abstraction has 622 states and 912 transitions. [2021-12-21 22:36:15,947 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-21 22:36:15,947 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 622 states and 912 transitions. [2021-12-21 22:36:15,950 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:15,950 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:15,950 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:15,951 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:15,951 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:15,951 INFO L791 eck$LassoCheckResult]: Stem: 4173#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 4174#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 4183#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 4184#fibonacciENTRY ~n := #in~n; 4228#L17 assume !(~n < 1); 4227#L19 assume !(1 == ~n); 4223#L22 call #t~ret4 := fibonacci(~n - 1);< 4226#fibonacciENTRY ~n := #in~n; 4225#L17 assume !(~n < 1); 4224#L19 assume !(1 == ~n); 4219#L22 call #t~ret4 := fibonacci(~n - 1);< 4222#fibonacciENTRY ~n := #in~n; 4221#L17 assume !(~n < 1); 4220#L19 assume !(1 == ~n); 4215#L22 call #t~ret4 := fibonacci(~n - 1);< 4218#fibonacciENTRY ~n := #in~n; 4217#L17 assume !(~n < 1); 4216#L19 assume !(1 == ~n); 4211#L22 call #t~ret4 := fibonacci(~n - 1);< 4214#fibonacciENTRY ~n := #in~n; 4213#L17 assume !(~n < 1); 4212#L19 assume !(1 == ~n); 4208#L22 call #t~ret4 := fibonacci(~n - 1);< 4210#fibonacciENTRY ~n := #in~n; 4209#L17 assume !(~n < 1); 4207#L19 assume !(1 == ~n); 4203#L22 call #t~ret4 := fibonacci(~n - 1);< 4202#fibonacciENTRY ~n := #in~n; 4205#L17 assume !(~n < 1); 4579#L19 assume !(1 == ~n); 4204#L22 call #t~ret4 := fibonacci(~n - 1);< 4202#fibonacciENTRY ~n := #in~n; 4206#L17 assume !(~n < 1); 4609#L19 assume 1 == ~n;#res := 1; 4608#fibonacciFINAL assume true; 4605#fibonacciEXIT >#29#return; 4384#L22-1 call #t~ret5 := fibonacci(~n - 2);< 4386#fibonacciENTRY ~n := #in~n; 4684#L17 assume !(~n < 1); 4618#L19 assume !(1 == ~n); 4619#L22 call #t~ret4 := fibonacci(~n - 1);< 4630#fibonacciENTRY ~n := #in~n; 4681#L17 assume !(~n < 1); 4634#L19 assume !(1 == ~n); 4635#L22 call #t~ret4 := fibonacci(~n - 1);< 4650#fibonacciENTRY [2021-12-21 22:36:15,951 INFO L793 eck$LassoCheckResult]: Loop: 4650#fibonacciENTRY ~n := #in~n; 4665#L17 assume !(~n < 1); 4662#L19 assume !(1 == ~n); 4647#L22 call #t~ret4 := fibonacci(~n - 1);< 4650#fibonacciENTRY [2021-12-21 22:36:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:15,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1413084929, now seen corresponding path program 1 times [2021-12-21 22:36:15,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:15,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543254137] [2021-12-21 22:36:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:15,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 22:36:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:16,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:16,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543254137] [2021-12-21 22:36:16,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543254137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:16,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786011905] [2021-12-21 22:36:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:16,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:16,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,082 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:16,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-21 22:36:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 22:36:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:16,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786011905] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:16,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:16,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2021-12-21 22:36:16,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562976034] [2021-12-21 22:36:16,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:16,312 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2021-12-21 22:36:16,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:16,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876603746] [2021-12-21 22:36:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:16,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:16,315 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:16,316 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:16,345 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:16,345 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:16,346 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:16,346 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:16,346 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:16,346 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,346 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:16,346 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:16,346 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-12-21 22:36:16,346 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:16,346 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:16,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,378 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:16,378 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:16,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,379 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) [2021-12-21 22:36:16,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:16,392 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:16,399 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:16,399 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:16,412 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 [2021-12-21 22:36:16,414 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 [2021-12-21 22:36:16,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,416 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) [2021-12-21 22:36:16,417 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 [2021-12-21 22:36:16,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:16,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:16,433 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:16,433 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:16,448 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 [2021-12-21 22:36:16,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,449 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) [2021-12-21 22:36:16,450 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 [2021-12-21 22:36:16,451 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:16,452 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:16,478 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 [2021-12-21 22:36:16,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,480 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) [2021-12-21 22:36:16,481 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 [2021-12-21 22:36:16,482 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:16,482 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:16,515 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:16,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:16,518 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:16,518 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:16,518 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:16,518 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:16,518 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:16,519 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,519 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:16,519 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:16,519 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-12-21 22:36:16,519 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:16,519 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:16,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,534 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:16,566 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:16,566 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:16,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,573 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) [2021-12-21 22:36:16,574 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 [2021-12-21 22:36:16,576 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 [2021-12-21 22:36:16,583 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:16,584 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:16,584 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:16,584 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:16,584 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:16,585 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:16,585 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:16,607 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:16,609 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:16,609 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:16,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:16,610 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) [2021-12-21 22:36:16,630 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:16,630 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:16,630 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:16,631 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-21 22:36:16,645 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 [2021-12-21 22:36:16,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:16,653 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:16,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 22:36:16,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:16,860 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 [2021-12-21 22:36:16,860 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:16,905 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 644 states and 934 transitions. Complement of second has 13 states. [2021-12-21 22:36:16,905 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 [2021-12-21 22:36:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-12-21 22:36:16,906 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2021-12-21 22:36:16,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:16,906 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:16,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 22:36:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:17,077 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 [2021-12-21 22:36:17,077 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:17,118 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 644 states and 934 transitions. Complement of second has 13 states. [2021-12-21 22:36:17,118 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 [2021-12-21 22:36:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-12-21 22:36:17,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2021-12-21 22:36:17,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:17,119 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 22:36:17,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:17,293 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 [2021-12-21 22:36:17,294 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:17,344 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 839 states and 1152 transitions. Complement of second has 14 states. [2021-12-21 22:36:17,345 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 [2021-12-21 22:36:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-12-21 22:36:17,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 4 letters. [2021-12-21 22:36:17,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:17,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2021-12-21 22:36:17,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:17,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 8 letters. [2021-12-21 22:36:17,347 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:17,347 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 839 states and 1152 transitions. [2021-12-21 22:36:17,356 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:17,362 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 839 states to 684 states and 985 transitions. [2021-12-21 22:36:17,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2021-12-21 22:36:17,363 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 250 [2021-12-21 22:36:17,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 684 states and 985 transitions. [2021-12-21 22:36:17,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:17,363 INFO L681 BuchiCegarLoop]: Abstraction has 684 states and 985 transitions. [2021-12-21 22:36:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states and 985 transitions. [2021-12-21 22:36:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 654. [2021-12-21 22:36:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 407 states have (on average 1.1523341523341524) internal successors, (469), 432 states have internal predecessors, (469), 151 states have call successors, (165), 76 states have call predecessors, (165), 96 states have return successors, (315), 145 states have call predecessors, (315), 141 states have call successors, (315) [2021-12-21 22:36:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 949 transitions. [2021-12-21 22:36:17,377 INFO L704 BuchiCegarLoop]: Abstraction has 654 states and 949 transitions. [2021-12-21 22:36:17,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 22:36:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-21 22:36:17,378 INFO L87 Difference]: Start difference. First operand 654 states and 949 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 14 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:17,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:17,646 INFO L93 Difference]: Finished difference Result 799 states and 1195 transitions. [2021-12-21 22:36:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 22:36:17,647 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 799 states and 1195 transitions. [2021-12-21 22:36:17,654 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:17,661 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 799 states to 778 states and 1163 transitions. [2021-12-21 22:36:17,661 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2021-12-21 22:36:17,662 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2021-12-21 22:36:17,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 778 states and 1163 transitions. [2021-12-21 22:36:17,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:17,662 INFO L681 BuchiCegarLoop]: Abstraction has 778 states and 1163 transitions. [2021-12-21 22:36:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states and 1163 transitions. [2021-12-21 22:36:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 710. [2021-12-21 22:36:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 441 states have (on average 1.145124716553288) internal successors, (505), 470 states have internal predecessors, (505), 169 states have call successors, (185), 86 states have call predecessors, (185), 100 states have return successors, (341), 153 states have call predecessors, (341), 159 states have call successors, (341) [2021-12-21 22:36:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1031 transitions. [2021-12-21 22:36:17,678 INFO L704 BuchiCegarLoop]: Abstraction has 710 states and 1031 transitions. [2021-12-21 22:36:17,678 INFO L587 BuchiCegarLoop]: Abstraction has 710 states and 1031 transitions. [2021-12-21 22:36:17,678 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-21 22:36:17,678 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 710 states and 1031 transitions. [2021-12-21 22:36:17,681 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:17,682 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:17,682 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:17,683 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:17,683 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:17,683 INFO L791 eck$LassoCheckResult]: Stem: 9192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 9193#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 9202#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 9203#fibonacciENTRY ~n := #in~n; 9312#L17 assume !(~n < 1); 9308#L19 assume !(1 == ~n); 9278#L22 call #t~ret4 := fibonacci(~n - 1);< 9295#fibonacciENTRY ~n := #in~n; 9660#L17 assume !(~n < 1); 9659#L19 assume !(1 == ~n); 9281#L22 call #t~ret4 := fibonacci(~n - 1);< 9282#fibonacciENTRY ~n := #in~n; 9372#L17 assume !(~n < 1); 9370#L19 assume !(1 == ~n); 9316#L22 call #t~ret4 := fibonacci(~n - 1);< 9318#fibonacciENTRY ~n := #in~n; 9618#L17 assume !(~n < 1); 9617#L19 assume !(1 == ~n); 9365#L22 call #t~ret4 := fibonacci(~n - 1);< 9367#fibonacciENTRY ~n := #in~n; 9620#L17 assume !(~n < 1); 9619#L19 assume !(1 == ~n); 9325#L22 call #t~ret4 := fibonacci(~n - 1);< 9369#fibonacciENTRY ~n := #in~n; 9459#L17 assume !(~n < 1); 9450#L19 assume !(1 == ~n); 9441#L22 call #t~ret4 := fibonacci(~n - 1);< 9446#fibonacciENTRY ~n := #in~n; 9544#L17 assume !(~n < 1); 9543#L19 assume !(1 == ~n); 9383#L22 call #t~ret4 := fibonacci(~n - 1);< 9489#fibonacciENTRY ~n := #in~n; 9553#L17 assume !(~n < 1); 9490#L19 assume !(1 == ~n); 9380#L22 call #t~ret4 := fibonacci(~n - 1);< 9489#fibonacciENTRY ~n := #in~n; 9556#L17 assume !(~n < 1); 9750#L19 assume 1 == ~n;#res := 1; 9749#fibonacciFINAL assume true; 9747#fibonacciEXIT >#29#return; 9743#L22-1 call #t~ret5 := fibonacci(~n - 2);< 9744#fibonacciENTRY ~n := #in~n; 9869#L17 assume !(~n < 1); 9764#L19 assume !(1 == ~n); 9766#L22 call #t~ret4 := fibonacci(~n - 1);< 9804#fibonacciENTRY ~n := #in~n; 9851#L17 assume !(~n < 1); 9849#L19 assume !(1 == ~n); 9208#L22 call #t~ret4 := fibonacci(~n - 1);< 9217#fibonacciENTRY ~n := #in~n; 9218#L17 assume !(~n < 1); 9861#L19 assume !(1 == ~n); 9209#L22 [2021-12-21 22:36:17,683 INFO L793 eck$LassoCheckResult]: Loop: 9209#L22 call #t~ret4 := fibonacci(~n - 1);< 9217#fibonacciENTRY ~n := #in~n; 9218#L17 assume !(~n < 1); 9861#L19 assume !(1 == ~n); 9209#L22 [2021-12-21 22:36:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1648910477, now seen corresponding path program 2 times [2021-12-21 22:36:17,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:17,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304567466] [2021-12-21 22:36:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:17,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:17,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 22:36:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 22:36:17,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304567466] [2021-12-21 22:36:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304567466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762926743] [2021-12-21 22:36:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 22:36:17,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:17,841 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:17,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-21 22:36:17,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 22:36:17,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 22:36:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 22:36:17,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 22:36:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 22:36:18,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762926743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:18,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:18,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2021-12-21 22:36:18,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811120566] [2021-12-21 22:36:18,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:18,101 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2021-12-21 22:36:18,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:18,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262452841] [2021-12-21 22:36:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:18,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:18,104 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:18,106 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:18,147 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:18,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:18,148 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:18,148 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:18,148 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:18,148 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:18,148 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:18,148 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:18,148 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-12-21 22:36:18,148 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:18,148 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:18,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:18,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:18,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:18,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:18,184 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:18,184 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:18,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:18,189 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2021-12-21 22:36:18,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-12-21 22:36:18,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:18,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:18,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:18,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:18,246 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) [2021-12-21 22:36:18,247 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 [2021-12-21 22:36:18,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:18,249 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:22,835 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:22,840 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 [2021-12-21 22:36:22,841 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:22,841 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:22,841 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:22,841 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:22,841 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:22,841 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:22,841 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:22,841 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:22,841 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-12-21 22:36:22,841 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:22,841 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:22,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:22,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:22,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:22,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:22,876 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:22,876 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:22,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:22,877 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) [2021-12-21 22:36:22,879 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 [2021-12-21 22:36:22,880 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 [2021-12-21 22:36:22,886 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:22,886 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:22,886 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:22,886 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:22,887 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:22,888 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:22,888 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:22,899 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:22,901 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-21 22:36:22,901 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-21 22:36:22,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:22,902 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) [2021-12-21 22:36:22,903 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 [2021-12-21 22:36:22,904 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:22,904 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:22,904 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:22,904 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-21 22:36:22,920 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 [2021-12-21 22:36:22,920 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 22:36:22,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:23,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:23,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:23,121 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 [2021-12-21 22:36:23,121 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:23,157 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 734 states and 1056 transitions. Complement of second has 18 states. [2021-12-21 22:36:23,171 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 [2021-12-21 22:36:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-12-21 22:36:23,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2021-12-21 22:36:23,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:23,173 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 22:36:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:23,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:23,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:23,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:23,427 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 [2021-12-21 22:36:23,427 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:23,482 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 964 states and 1378 transitions. Complement of second has 22 states. [2021-12-21 22:36:23,483 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 [2021-12-21 22:36:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-12-21 22:36:23,483 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2021-12-21 22:36:23,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:23,483 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2021-12-21 22:36:23,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:23,483 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 8 letters. [2021-12-21 22:36:23,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:23,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 964 states and 1378 transitions. [2021-12-21 22:36:23,490 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:23,497 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 964 states to 888 states and 1297 transitions. [2021-12-21 22:36:23,497 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 290 [2021-12-21 22:36:23,497 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 318 [2021-12-21 22:36:23,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 888 states and 1297 transitions. [2021-12-21 22:36:23,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:23,498 INFO L681 BuchiCegarLoop]: Abstraction has 888 states and 1297 transitions. [2021-12-21 22:36:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states and 1297 transitions. [2021-12-21 22:36:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 875. [2021-12-21 22:36:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 551 states have (on average 1.1306715063520871) internal successors, (623), 588 states have internal predecessors, (623), 202 states have call successors, (236), 113 states have call predecessors, (236), 122 states have return successors, (421), 173 states have call predecessors, (421), 192 states have call successors, (421) [2021-12-21 22:36:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1280 transitions. [2021-12-21 22:36:23,519 INFO L704 BuchiCegarLoop]: Abstraction has 875 states and 1280 transitions. [2021-12-21 22:36:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 22:36:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-12-21 22:36:23,520 INFO L87 Difference]: Start difference. First operand 875 states and 1280 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 12 states have internal predecessors, (35), 10 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:23,726 INFO L93 Difference]: Finished difference Result 475 states and 560 transitions. [2021-12-21 22:36:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 22:36:23,727 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 475 states and 560 transitions. [2021-12-21 22:36:23,729 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-21 22:36:23,729 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 475 states to 0 states and 0 transitions. [2021-12-21 22:36:23,729 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-21 22:36:23,730 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-21 22:36:23,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-21 22:36:23,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 22:36:23,730 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 22:36:23,730 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 22:36:23,730 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 22:36:23,730 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-21 22:36:23,730 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-21 22:36:23,730 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-21 22:36:23,730 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-21 22:36:23,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.12 10:36:23 BoogieIcfgContainer [2021-12-21 22:36:23,744 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-21 22:36:23,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 22:36:23,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 22:36:23,745 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 22:36:23,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:36:09" (3/4) ... [2021-12-21 22:36:23,747 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 22:36:23,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 22:36:23,748 INFO L158 Benchmark]: Toolchain (without parser) took 14767.36ms. Allocated memory was 138.4MB in the beginning and 222.3MB in the end (delta: 83.9MB). Free memory was 79.4MB in the beginning and 125.6MB in the end (delta: -46.2MB). Peak memory consumption was 38.8MB. Max. memory is 16.1GB. [2021-12-21 22:36:23,748 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 138.4MB. Free memory was 96.2MB in the beginning and 96.2MB in the end (delta: 71.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 22:36:23,749 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.01ms. Allocated memory is still 138.4MB. Free memory was 79.3MB in the beginning and 114.3MB in the end (delta: -35.0MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-12-21 22:36:23,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.21ms. Allocated memory is still 138.4MB. Free memory was 114.3MB in the beginning and 112.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:36:23,750 INFO L158 Benchmark]: Boogie Preprocessor took 10.53ms. Allocated memory is still 138.4MB. Free memory was 112.8MB in the beginning and 112.2MB in the end (delta: 591.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 22:36:23,751 INFO L158 Benchmark]: RCFGBuilder took 205.27ms. Allocated memory is still 138.4MB. Free memory was 112.2MB in the beginning and 102.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 22:36:23,751 INFO L158 Benchmark]: BuchiAutomizer took 14289.19ms. Allocated memory was 138.4MB in the beginning and 222.3MB in the end (delta: 83.9MB). Free memory was 102.4MB in the beginning and 126.7MB in the end (delta: -24.3MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. [2021-12-21 22:36:23,751 INFO L158 Benchmark]: Witness Printer took 2.73ms. Allocated memory is still 222.3MB. Free memory was 126.7MB in the beginning and 125.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:36:23,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 138.4MB. Free memory was 96.2MB in the beginning and 96.2MB in the end (delta: 71.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.01ms. Allocated memory is still 138.4MB. Free memory was 79.3MB in the beginning and 114.3MB in the end (delta: -35.0MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.21ms. Allocated memory is still 138.4MB. Free memory was 114.3MB in the beginning and 112.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.53ms. Allocated memory is still 138.4MB. Free memory was 112.8MB in the beginning and 112.2MB in the end (delta: 591.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 205.27ms. Allocated memory is still 138.4MB. Free memory was 112.2MB in the beginning and 102.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 14289.19ms. Allocated memory was 138.4MB in the beginning and 222.3MB in the end (delta: 83.9MB). Free memory was 102.4MB in the beginning and 126.7MB in the end (delta: -24.3MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. * Witness Printer took 2.73ms. Allocated memory is still 222.3MB. Free memory was 126.7MB in the beginning and 125.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 14.2s and 7 iterations. TraceHistogramMax:12. Analysis of lassos took 9.5s. Construction of modules took 0.7s. Büchi inclusion checks took 3.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 250 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 710 states and ocurred in iteration 5. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 595 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 570 mSDsluCounter, 611 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 392 mSDsCounter, 438 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1398 IncrementalHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 438 mSolverCounterUnsat, 219 mSDtfsCounter, 1398 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 41ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-21 22:36:23,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:23,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:24,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:24,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:24,616 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE