./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-16 10:02:24,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 10:02:24,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 10:02:24,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 10:02:24,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 10:02:24,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 10:02:24,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 10:02:24,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 10:02:24,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 10:02:24,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 10:02:24,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 10:02:24,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 10:02:24,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 10:02:24,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 10:02:24,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 10:02:24,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 10:02:24,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 10:02:24,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 10:02:24,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 10:02:24,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 10:02:24,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 10:02:24,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 10:02:24,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 10:02:24,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 10:02:24,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 10:02:24,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 10:02:24,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 10:02:24,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 10:02:24,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 10:02:24,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 10:02:24,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 10:02:24,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 10:02:24,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 10:02:24,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 10:02:24,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 10:02:24,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 10:02:24,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 10:02:24,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 10:02:24,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 10:02:24,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 10:02:24,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 10:02:24,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-16 10:02:24,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 10:02:24,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 10:02:24,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 10:02:24,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 10:02:24,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 10:02:24,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 10:02:24,580 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 10:02:24,580 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 10:02:24,580 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 10:02:24,580 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 10:02:24,581 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 10:02:24,581 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 10:02:24,581 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 10:02:24,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 10:02:24,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 10:02:24,581 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 10:02:24,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 10:02:24,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 10:02:24,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 10:02:24,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 10:02:24,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 10:02:24,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 10:02:24,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 10:02:24,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 10:02:24,584 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 10:02:24,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 10:02:24,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 10:02:24,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 10:02:24,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 10:02:24,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 10:02:24,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 10:02:24,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 10:02:24,585 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 10:02:24,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2021-12-16 10:02:24,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 10:02:24,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 10:02:24,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 10:02:24,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 10:02:24,786 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 10:02:24,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci02.c [2021-12-16 10:02:24,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222f51b44/465d1c0221414144a3505021e68922a8/FLAG553754df3 [2021-12-16 10:02:25,194 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 10:02:25,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c [2021-12-16 10:02:25,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222f51b44/465d1c0221414144a3505021e68922a8/FLAG553754df3 [2021-12-16 10:02:25,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222f51b44/465d1c0221414144a3505021e68922a8 [2021-12-16 10:02:25,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 10:02:25,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 10:02:25,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 10:02:25,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 10:02:25,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 10:02:25,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5551d3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25, skipping insertion in model container [2021-12-16 10:02:25,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 10:02:25,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 10:02:25,328 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] [2021-12-16 10:02:25,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 10:02:25,334 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 10:02:25,350 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] [2021-12-16 10:02:25,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 10:02:25,360 INFO L208 MainTranslator]: Completed translation [2021-12-16 10:02:25,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25 WrapperNode [2021-12-16 10:02:25,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 10:02:25,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 10:02:25,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 10:02:25,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 10:02:25,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,383 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-16 10:02:25,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 10:02:25,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 10:02:25,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 10:02:25,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 10:02:25,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 10:02:25,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 10:02:25,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 10:02:25,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 10:02:25,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (1/1) ... [2021-12-16 10:02:25,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:25,427 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) [2021-12-16 10:02:25,435 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 [2021-12-16 10:02:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-12-16 10:02:25,453 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-12-16 10:02:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 10:02:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 10:02:25,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 10:02:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 10:02:25,489 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 10:02:25,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 10:02:25,565 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 10:02:25,573 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 10:02:25,574 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 10:02:25,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:02:25 BoogieIcfgContainer [2021-12-16 10:02:25,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 10:02:25,576 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 10:02:25,576 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 10:02:25,578 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 10:02:25,579 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 10:02:25,579 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 10:02:25" (1/3) ... [2021-12-16 10:02:25,584 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2b1640b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 10:02:25, skipping insertion in model container [2021-12-16 10:02:25,584 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 10:02:25,584 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:02:25" (2/3) ... [2021-12-16 10:02:25,584 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2b1640b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 10:02:25, skipping insertion in model container [2021-12-16 10:02:25,585 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 10:02:25,585 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:02:25" (3/3) ... [2021-12-16 10:02:25,586 INFO L388 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2021-12-16 10:02:25,628 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 10:02:25,628 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 10:02:25,629 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 10:02:25,629 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 10:02:25,629 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 10:02:25,629 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 10:02:25,629 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 10:02:25,629 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 10:02:25,657 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) [2021-12-16 10:02:25,671 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:02:25,671 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:25,671 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:25,675 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 10:02:25,676 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 10:02:25,676 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 10:02:25,676 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) [2021-12-16 10:02:25,677 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:02:25,678 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:25,678 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:25,678 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 10:02:25,678 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 10:02:25,682 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 [2021-12-16 10:02:25,683 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 [2021-12-16 10:02:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2021-12-16 10:02:25,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:25,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931771654] [2021-12-16 10:02:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:25,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:25,745 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:25,768 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2021-12-16 10:02:25,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:25,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687152827] [2021-12-16 10:02:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:25,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:25,787 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:25,794 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2021-12-16 10:02:25,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835081771] [2021-12-16 10:02:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:25,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:25,814 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:25,828 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:25,932 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:25,932 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:25,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:25,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:25,933 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:02:25,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:25,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:25,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:25,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-12-16 10:02:25,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:25,933 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:25,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:25,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:25,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:25,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:25,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:25,997 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:25,997 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:02:25,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,000 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) [2021-12-16 10:02:26,004 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:26,004 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:26,013 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 [2021-12-16 10:02:26,016 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:26,017 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:26,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:26,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,037 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) [2021-12-16 10:02:26,038 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 [2021-12-16 10:02:26,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:26,040 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:26,061 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:26,061 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:26,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:26,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,080 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) [2021-12-16 10:02:26,081 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 [2021-12-16 10:02:26,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:26,082 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:26,104 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:26,105 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:26,121 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 [2021-12-16 10:02:26,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,124 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) [2021-12-16 10:02:26,126 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 [2021-12-16 10:02:26,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:26,137 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:26,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-16 10:02:26,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,185 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) [2021-12-16 10:02:26,187 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 [2021-12-16 10:02:26,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:02:26,188 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:26,220 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:02:26,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:26,240 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:26,240 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:26,240 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:26,240 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:26,240 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:02:26,240 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,240 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:26,240 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:26,240 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-12-16 10:02:26,241 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:26,241 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:26,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:26,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:26,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:26,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:26,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:26,293 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:26,297 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:02:26,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,299 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) [2021-12-16 10:02:26,300 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 [2021-12-16 10:02:26,302 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 [2021-12-16 10:02:26,309 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:26,309 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:26,309 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:26,310 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:26,310 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:26,311 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:26,311 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:26,326 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:26,341 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 [2021-12-16 10:02:26,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,342 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) [2021-12-16 10:02:26,343 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 [2021-12-16 10:02:26,345 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 [2021-12-16 10:02:26,351 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:26,351 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:26,351 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:26,351 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:26,351 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:26,352 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:26,352 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:26,366 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:26,384 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 [2021-12-16 10:02:26,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,385 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) [2021-12-16 10:02:26,386 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 [2021-12-16 10:02:26,388 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 [2021-12-16 10:02:26,394 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:26,394 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:26,394 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:26,394 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:26,394 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:26,395 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:26,395 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:26,400 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:26,420 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 [2021-12-16 10:02:26,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,421 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) [2021-12-16 10:02:26,422 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 [2021-12-16 10:02:26,423 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 [2021-12-16 10:02:26,429 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:26,430 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:26,430 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:26,430 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:26,430 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:26,432 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:26,432 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:26,454 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:02:26,473 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 10:02:26,473 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 10:02:26,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:26,475 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) [2021-12-16 10:02:26,476 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 [2021-12-16 10:02:26,479 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:02:26,479 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:02:26,480 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:02:26,480 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-16 10:02:26,500 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 [2021-12-16 10:02:26,502 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:02:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 10:02:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:26,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:02:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:26,646 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 [2021-12-16 10:02:26,647 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) [2021-12-16 10:02:26,712 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. [2021-12-16 10:02:26,714 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 [2021-12-16 10:02:26,717 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) [2021-12-16 10:02:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-12-16 10:02:26,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-16 10:02:26,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:26,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-16 10:02:26,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:26,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-16 10:02:26,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:26,720 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-12-16 10:02:26,723 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:02:26,727 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2021-12-16 10:02:26,728 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-16 10:02:26,728 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-16 10:02:26,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-12-16 10:02:26,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:26,728 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-16 10:02:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-12-16 10:02:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-12-16 10:02:26,750 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) [2021-12-16 10:02:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-16 10:02:26,758 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-16 10:02:26,758 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-16 10:02:26,758 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 10:02:26,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-12-16 10:02:26,760 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:02:26,760 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:26,760 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:26,761 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:26,761 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:26,762 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 [2021-12-16 10:02:26,762 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 [2021-12-16 10:02:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2021-12-16 10:02:26,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:26,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619594184] [2021-12-16 10:02:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:26,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:26,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 10:02:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 10:02:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:02:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619594184] [2021-12-16 10:02:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619594184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 10:02:26,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 10:02:26,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 10:02:26,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495414751] [2021-12-16 10:02:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 10:02:26,871 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:02:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2021-12-16 10:02:26,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451234227] [2021-12-16 10:02:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:26,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 10:02:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:26,922 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 [2021-12-16 10:02:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 10:02:26,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:02:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451234227] [2021-12-16 10:02:26,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451234227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 10:02:26,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 10:02:26,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 10:02:26,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139928858] [2021-12-16 10:02:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 10:02:26,932 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-16 10:02:26,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:02:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 10:02:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 10:02:26,936 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) [2021-12-16 10:02:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:02:26,982 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-16 10:02:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 10:02:26,983 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-12-16 10:02:26,984 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:02:26,985 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-12-16 10:02:26,985 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-12-16 10:02:26,985 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-12-16 10:02:26,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-12-16 10:02:26,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:26,985 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 10:02:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-12-16 10:02:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-16 10:02:26,987 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) [2021-12-16 10:02:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-16 10:02:26,987 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 10:02:26,988 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 10:02:26,988 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-16 10:02:26,988 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-12-16 10:02:26,988 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:02:26,988 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:26,988 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:26,989 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:26,989 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:26,989 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 [2021-12-16 10:02:26,989 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 [2021-12-16 10:02:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2021-12-16 10:02:26,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:26,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183674745] [2021-12-16 10:02:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:26,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:27,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 10:02:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:27,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:02:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183674745] [2021-12-16 10:02:27,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183674745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:02:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033096048] [2021-12-16 10:02:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:27,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:02:27,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:27,040 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) [2021-12-16 10:02:27,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 10:02:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 10:02:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:27,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:02:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033096048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:02:27,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:02:27,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 10:02:27,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427947929] [2021-12-16 10:02:27,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:02:27,207 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:02:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2021-12-16 10:02:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:27,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606172278] [2021-12-16 10:02:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:27,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:27,211 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:27,214 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:27,300 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:27,300 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:27,301 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:27,301 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:27,301 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:02:27,301 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:27,301 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:27,301 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:27,301 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-12-16 10:02:27,301 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:27,301 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:27,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:27,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:27,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:27,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:27,339 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:27,339 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:02:27,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:27,340 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) [2021-12-16 10:02:27,341 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 [2021-12-16 10:02:27,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:27,343 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:27,350 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:27,350 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:27,365 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 [2021-12-16 10:02:27,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:27,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:27,367 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) [2021-12-16 10:02:27,368 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 [2021-12-16 10:02:27,372 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:27,372 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:27,386 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:27,386 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:27,403 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 [2021-12-16 10:02:27,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:27,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:27,420 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) [2021-12-16 10:02:27,421 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 [2021-12-16 10:02:27,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:27,422 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:27,442 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:27,443 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:27,459 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 [2021-12-16 10:02:27,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:27,460 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) [2021-12-16 10:02:27,461 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 [2021-12-16 10:02:27,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:27,463 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:27,488 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 [2021-12-16 10:02:27,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:27,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:27,490 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) [2021-12-16 10:02:27,490 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 [2021-12-16 10:02:27,492 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:02:27,492 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:28,137 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:02:28,140 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 [2021-12-16 10:02:28,140 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:28,141 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:28,141 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:28,141 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:28,141 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:02:28,141 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:28,141 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:28,141 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:28,141 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-12-16 10:02:28,141 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:28,141 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:28,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:28,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:28,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:28,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:28,189 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:28,189 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:02:28,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:28,190 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) [2021-12-16 10:02:28,191 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 [2021-12-16 10:02:28,193 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 [2021-12-16 10:02:28,198 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:28,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:28,198 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:28,198 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:28,198 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:28,199 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:28,199 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:28,214 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:28,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-12-16 10:02:28,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:28,264 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) [2021-12-16 10:02:28,269 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 [2021-12-16 10:02:28,269 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 [2021-12-16 10:02:28,274 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:28,275 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:28,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:28,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:28,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:28,275 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:28,275 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:28,276 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:28,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-12-16 10:02:28,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:28,293 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) [2021-12-16 10:02:28,297 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 [2021-12-16 10:02:28,297 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 [2021-12-16 10:02:28,304 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:28,305 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:28,305 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:28,305 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:28,305 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:28,305 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:28,305 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:28,306 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:28,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-12-16 10:02:28,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:28,327 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) [2021-12-16 10:02:28,349 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 [2021-12-16 10:02:28,349 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 [2021-12-16 10:02:28,355 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:28,355 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:28,355 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:28,355 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:28,356 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:28,357 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:28,357 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:28,379 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:02:28,395 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 10:02:28,396 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 10:02:28,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:28,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:28,397 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) [2021-12-16 10:02:28,398 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 [2021-12-16 10:02:28,398 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:02:28,398 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:02:28,399 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:02:28,399 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-16 10:02:28,414 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 [2021-12-16 10:02:28,415 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:02:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 10:02:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:28,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 10:02:28,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:28,587 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 [2021-12-16 10:02:28,587 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) [2021-12-16 10:02:28,730 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. [2021-12-16 10:02:28,731 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 [2021-12-16 10:02:28,745 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) [2021-12-16 10:02:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-16 10:02:28,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-12-16 10:02:28,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:28,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-12-16 10:02:28,748 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:28,748 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-12-16 10:02:28,750 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:28,750 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-12-16 10:02:28,760 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-16 10:02:28,765 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-12-16 10:02:28,766 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-12-16 10:02:28,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-12-16 10:02:28,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-12-16 10:02:28,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:28,767 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-12-16 10:02:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-12-16 10:02:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-16 10:02:28,784 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) [2021-12-16 10:02:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-12-16 10:02:28,789 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-12-16 10:02:28,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:02:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 10:02:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 10:02:28,796 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) [2021-12-16 10:02:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:02:28,942 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2021-12-16 10:02:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 10:02:28,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2021-12-16 10:02:28,945 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-16 10:02:28,947 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2021-12-16 10:02:28,947 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-12-16 10:02:28,948 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-12-16 10:02:28,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2021-12-16 10:02:28,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:28,948 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2021-12-16 10:02:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2021-12-16 10:02:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-12-16 10:02:28,959 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) [2021-12-16 10:02:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-16 10:02:28,960 INFO L704 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-16 10:02:28,960 INFO L587 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-16 10:02:28,960 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-16 10:02:28,960 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2021-12-16 10:02:28,961 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-16 10:02:28,961 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:28,961 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:28,962 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:28,962 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:28,962 INFO L791 eck$LassoCheckResult]: Stem: 805#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 806#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 788#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 814#fibonacciENTRY ~n := #in~n; 799#L17 assume !(~n < 1); 800#L19 assume !(1 == ~n); 795#L22 call #t~ret4 := fibonacci(~n - 1);< 794#fibonacciENTRY ~n := #in~n; 796#L17 assume !(~n < 1); 852#L19 assume !(1 == ~n); 803#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 851#L17 assume !(~n < 1); 849#L19 assume 1 == ~n;#res := 1; 847#fibonacciFINAL assume true; 846#fibonacciEXIT >#29#return; 791#L22-1 call #t~ret5 := fibonacci(~n - 2);< 844#fibonacciENTRY ~n := #in~n; 797#L17 assume ~n < 1;#res := 0; 798#fibonacciFINAL assume true; 888#fibonacciEXIT >#31#return; 887#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 885#fibonacciFINAL assume true; 877#fibonacciEXIT >#29#return; 819#L22-1 [2021-12-16 10:02:28,962 INFO L793 eck$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 [2021-12-16 10:02:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 1 times [2021-12-16 10:02:28,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642171265] [2021-12-16 10:02:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:28,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 10:02:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:29,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 10:02:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:29,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 10:02:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 10:02:29,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:02:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642171265] [2021-12-16 10:02:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642171265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:02:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465765899] [2021-12-16 10:02:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:29,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:02:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:29,085 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) [2021-12-16 10:02:29,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 10:02:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:29,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 10:02:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:29,156 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 [2021-12-16 10:02:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 10:02:29,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:02:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 10:02:29,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465765899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:02:29,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:02:29,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2021-12-16 10:02:29,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846349490] [2021-12-16 10:02:29,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:02:29,435 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:02:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 2 times [2021-12-16 10:02:29,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:29,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271174534] [2021-12-16 10:02:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:29,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:29,439 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:29,442 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:29,525 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:29,525 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:29,525 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:29,525 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:29,525 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:02:29,525 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:29,526 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:29,526 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:29,526 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2021-12-16 10:02:29,526 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:29,526 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:29,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:29,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:29,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:29,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:29,566 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:29,567 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:02:29,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:29,568 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) [2021-12-16 10:02:29,569 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 [2021-12-16 10:02:29,570 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:29,570 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:29,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:29,592 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:29,607 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 [2021-12-16 10:02:29,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:29,609 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) [2021-12-16 10:02:29,609 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 [2021-12-16 10:02:29,610 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:29,610 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:29,617 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:29,617 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:29,635 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 [2021-12-16 10:02:29,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:29,636 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) [2021-12-16 10:02:29,637 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 [2021-12-16 10:02:29,638 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:29,638 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:29,644 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:29,644 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:29,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-16 10:02:29,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:29,661 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) [2021-12-16 10:02:29,662 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 [2021-12-16 10:02:29,662 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:29,663 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:29,693 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 [2021-12-16 10:02:29,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:29,694 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) [2021-12-16 10:02:29,696 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 [2021-12-16 10:02:29,696 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:02:29,696 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:30,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:02:30,536 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 [2021-12-16 10:02:30,536 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:30,536 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:30,536 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:30,536 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:30,536 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:02:30,536 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:30,536 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:30,536 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:30,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2021-12-16 10:02:30,537 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:30,537 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:30,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:30,540 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:30,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:30,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:30,566 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:30,567 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:02:30,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:30,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:30,579 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) [2021-12-16 10:02:30,583 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 [2021-12-16 10:02:30,583 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 [2021-12-16 10:02:30,589 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:30,589 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:30,589 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:30,589 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:30,589 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:30,589 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:30,589 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:30,590 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:30,607 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 [2021-12-16 10:02:30,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:30,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:30,609 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) [2021-12-16 10:02:30,609 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 [2021-12-16 10:02:30,611 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 [2021-12-16 10:02:30,616 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:30,616 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:30,617 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:30,617 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:30,617 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:30,617 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:30,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:30,620 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:30,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-12-16 10:02:30,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:30,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:30,637 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) [2021-12-16 10:02:30,638 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 [2021-12-16 10:02:30,638 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 [2021-12-16 10:02:30,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:30,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:30,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:30,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:30,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:30,644 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:30,644 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:30,648 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:02:30,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-12-16 10:02:30,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:30,664 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) [2021-12-16 10:02:30,665 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 [2021-12-16 10:02:30,666 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 [2021-12-16 10:02:30,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:30,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:30,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:30,672 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:30,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:30,673 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:30,673 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:30,680 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:02:30,682 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 10:02:30,682 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 10:02:30,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:30,683 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) [2021-12-16 10:02:30,684 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 [2021-12-16 10:02:30,685 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:02:30,685 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:02:30,685 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:02:30,685 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-16 10:02:30,700 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 [2021-12-16 10:02:30,701 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:02:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 10:02:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:30,911 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 [2021-12-16 10:02:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 10:02:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:31,078 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 [2021-12-16 10:02:31,079 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) [2021-12-16 10:02:31,225 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. [2021-12-16 10:02:31,226 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 [2021-12-16 10:02:31,228 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) [2021-12-16 10:02:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-16 10:02:31,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 32 letters. Loop has 10 letters. [2021-12-16 10:02:31,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:31,229 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:02:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 10:02:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:31,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 10:02:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:31,555 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 [2021-12-16 10:02:31,555 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) [2021-12-16 10:02:31,651 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. [2021-12-16 10:02:31,651 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 [2021-12-16 10:02:31,652 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) [2021-12-16 10:02:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-12-16 10:02:31,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 10 letters. [2021-12-16 10:02:31,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:31,652 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:02:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:31,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 10:02:31,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 10:02:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:31,991 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 [2021-12-16 10:02:31,991 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) [2021-12-16 10:02:32,127 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. [2021-12-16 10:02:32,128 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 [2021-12-16 10:02:32,128 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) [2021-12-16 10:02:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2021-12-16 10:02:32,129 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 10 letters. [2021-12-16 10:02:32,129 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:32,129 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 42 letters. Loop has 10 letters. [2021-12-16 10:02:32,130 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:32,130 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 20 letters. [2021-12-16 10:02:32,130 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:32,131 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 858 states and 1136 transitions. [2021-12-16 10:02:32,139 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2021-12-16 10:02:32,156 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 858 states to 430 states and 620 transitions. [2021-12-16 10:02:32,156 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 163 [2021-12-16 10:02:32,156 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 188 [2021-12-16 10:02:32,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 430 states and 620 transitions. [2021-12-16 10:02:32,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:32,157 INFO L681 BuchiCegarLoop]: Abstraction has 430 states and 620 transitions. [2021-12-16 10:02:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states and 620 transitions. [2021-12-16 10:02:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 352. [2021-12-16 10:02:32,187 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) [2021-12-16 10:02:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 485 transitions. [2021-12-16 10:02:32,189 INFO L704 BuchiCegarLoop]: Abstraction has 352 states and 485 transitions. [2021-12-16 10:02:32,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:02:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 10:02:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-12-16 10:02:32,197 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) [2021-12-16 10:02:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:02:32,531 INFO L93 Difference]: Finished difference Result 683 states and 994 transitions. [2021-12-16 10:02:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 10:02:32,531 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 683 states and 994 transitions. [2021-12-16 10:02:32,538 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-16 10:02:32,555 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 683 states to 652 states and 949 transitions. [2021-12-16 10:02:32,555 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 282 [2021-12-16 10:02:32,556 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 285 [2021-12-16 10:02:32,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 949 transitions. [2021-12-16 10:02:32,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:32,556 INFO L681 BuchiCegarLoop]: Abstraction has 652 states and 949 transitions. [2021-12-16 10:02:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 949 transitions. [2021-12-16 10:02:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 622. [2021-12-16 10:02:32,574 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) [2021-12-16 10:02:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 912 transitions. [2021-12-16 10:02:32,580 INFO L704 BuchiCegarLoop]: Abstraction has 622 states and 912 transitions. [2021-12-16 10:02:32,580 INFO L587 BuchiCegarLoop]: Abstraction has 622 states and 912 transitions. [2021-12-16 10:02:32,580 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-16 10:02:32,580 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 622 states and 912 transitions. [2021-12-16 10:02:32,583 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-16 10:02:32,583 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:32,583 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:32,584 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:32,584 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 10:02:32,585 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 [2021-12-16 10:02:32,585 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 [2021-12-16 10:02:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1413084929, now seen corresponding path program 1 times [2021-12-16 10:02:32,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:32,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690106298] [2021-12-16 10:02:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:32,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:32,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 10:02:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 10:02:32,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:02:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690106298] [2021-12-16 10:02:32,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690106298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:02:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625260018] [2021-12-16 10:02:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:32,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:02:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:32,776 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) [2021-12-16 10:02:32,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-16 10:02:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:32,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 10:02:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 10:02:32,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:02:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 10:02:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625260018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:02:33,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:02:33,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2021-12-16 10:02:33,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199686419] [2021-12-16 10:02:33,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:02:33,028 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:02:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2021-12-16 10:02:33,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:33,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942135551] [2021-12-16 10:02:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:33,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:33,031 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:33,035 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:33,067 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:33,068 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:33,068 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:33,068 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:33,068 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:02:33,068 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,068 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:33,068 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:33,068 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-12-16 10:02:33,068 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:33,068 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:33,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,101 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:33,101 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:02:33,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:33,102 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) [2021-12-16 10:02:33,103 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 [2021-12-16 10:02:33,105 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:33,105 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:33,125 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:33,126 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:33,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:33,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:33,145 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) [2021-12-16 10:02:33,145 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 [2021-12-16 10:02:33,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:33,147 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:33,167 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:02:33,168 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:02:33,183 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 [2021-12-16 10:02:33,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:33,184 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) [2021-12-16 10:02:33,185 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 [2021-12-16 10:02:33,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:33,187 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:33,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:33,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:33,253 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) [2021-12-16 10:02:33,254 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 [2021-12-16 10:02:33,255 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:02:33,255 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:33,280 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:02:33,283 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 [2021-12-16 10:02:33,283 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:33,283 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:33,283 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:33,284 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:33,284 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:02:33,284 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,284 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:33,284 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:33,284 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-12-16 10:02:33,284 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:33,284 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:33,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:33,326 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:33,326 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:02:33,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:33,327 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) [2021-12-16 10:02:33,328 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 [2021-12-16 10:02:33,367 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 [2021-12-16 10:02:33,373 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:33,373 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:33,373 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:33,373 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:33,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:33,374 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:33,374 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:33,398 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:02:33,399 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-16 10:02:33,399 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-16 10:02:33,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:33,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:33,400 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) [2021-12-16 10:02:33,430 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 [2021-12-16 10:02:33,432 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:02:33,432 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:02:33,432 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:02:33,432 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-16 10:02:33,450 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 [2021-12-16 10:02:33,450 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:02:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 10:02:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:33,664 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 [2021-12-16 10:02:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:33,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:02:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:33,735 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 [2021-12-16 10:02:33,735 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) [2021-12-16 10:02:33,783 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. [2021-12-16 10:02:33,784 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 [2021-12-16 10:02:33,784 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) [2021-12-16 10:02:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-12-16 10:02:33,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2021-12-16 10:02:33,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:33,785 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:02:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:33,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 10:02:33,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:02:33,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:33,992 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 [2021-12-16 10:02:33,992 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) [2021-12-16 10:02:34,039 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. [2021-12-16 10:02:34,040 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 [2021-12-16 10:02:34,040 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) [2021-12-16 10:02:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-12-16 10:02:34,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2021-12-16 10:02:34,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:34,041 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:02:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 10:02:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:02:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:34,258 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 [2021-12-16 10:02:34,259 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) [2021-12-16 10:02:34,314 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. [2021-12-16 10:02:34,314 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 [2021-12-16 10:02:34,315 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) [2021-12-16 10:02:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-12-16 10:02:34,315 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 4 letters. [2021-12-16 10:02:34,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:34,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2021-12-16 10:02:34,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:34,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 8 letters. [2021-12-16 10:02:34,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:34,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 839 states and 1152 transitions. [2021-12-16 10:02:34,323 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-16 10:02:34,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 839 states to 684 states and 985 transitions. [2021-12-16 10:02:34,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2021-12-16 10:02:34,329 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 250 [2021-12-16 10:02:34,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 684 states and 985 transitions. [2021-12-16 10:02:34,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:34,329 INFO L681 BuchiCegarLoop]: Abstraction has 684 states and 985 transitions. [2021-12-16 10:02:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states and 985 transitions. [2021-12-16 10:02:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 654. [2021-12-16 10:02:34,340 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) [2021-12-16 10:02:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 949 transitions. [2021-12-16 10:02:34,344 INFO L704 BuchiCegarLoop]: Abstraction has 654 states and 949 transitions. [2021-12-16 10:02:34,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:02:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 10:02:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-16 10:02:34,344 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) [2021-12-16 10:02:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:02:34,575 INFO L93 Difference]: Finished difference Result 799 states and 1195 transitions. [2021-12-16 10:02:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 10:02:34,576 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 799 states and 1195 transitions. [2021-12-16 10:02:34,584 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-16 10:02:34,606 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 799 states to 778 states and 1163 transitions. [2021-12-16 10:02:34,606 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2021-12-16 10:02:34,607 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2021-12-16 10:02:34,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 778 states and 1163 transitions. [2021-12-16 10:02:34,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:34,607 INFO L681 BuchiCegarLoop]: Abstraction has 778 states and 1163 transitions. [2021-12-16 10:02:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states and 1163 transitions. [2021-12-16 10:02:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 710. [2021-12-16 10:02:34,632 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) [2021-12-16 10:02:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1031 transitions. [2021-12-16 10:02:34,651 INFO L704 BuchiCegarLoop]: Abstraction has 710 states and 1031 transitions. [2021-12-16 10:02:34,651 INFO L587 BuchiCegarLoop]: Abstraction has 710 states and 1031 transitions. [2021-12-16 10:02:34,651 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-16 10:02:34,651 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 710 states and 1031 transitions. [2021-12-16 10:02:34,655 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-16 10:02:34,655 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:02:34,655 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:02:34,656 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:02:34,656 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 10:02:34,656 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 [2021-12-16 10:02:34,656 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 [2021-12-16 10:02:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1648910477, now seen corresponding path program 2 times [2021-12-16 10:02:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941380973] [2021-12-16 10:02:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:34,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:34,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 10:02:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 10:02:34,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:02:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941380973] [2021-12-16 10:02:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941380973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:02:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108082816] [2021-12-16 10:02:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 10:02:34,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:02:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:34,779 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) [2021-12-16 10:02:34,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-16 10:02:34,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 10:02:34,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 10:02:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 10:02:34,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 10:02:34,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:02:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 10:02:34,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108082816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:02:34,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:02:34,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2021-12-16 10:02:34,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351319435] [2021-12-16 10:02:34,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:02:34,979 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:02:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2021-12-16 10:02:34,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:02:34,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094834331] [2021-12-16 10:02:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:02:34,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:02:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:34,982 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:02:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:02:34,985 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:02:35,018 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:35,018 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:35,018 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:35,018 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:35,019 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:02:35,019 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:35,019 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:35,019 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:35,019 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-12-16 10:02:35,019 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:35,019 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:35,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:35,024 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:35,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:35,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:35,058 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:35,058 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:02:35,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:35,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:35,059 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) [2021-12-16 10:02:35,083 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:02:35,083 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:35,094 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 [2021-12-16 10:02:35,118 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 [2021-12-16 10:02:35,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:35,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:35,119 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) [2021-12-16 10:02:35,120 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 [2021-12-16 10:02:35,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:02:35,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:02:36,146 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:02:36,152 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 [2021-12-16 10:02:36,152 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:02:36,152 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:02:36,152 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:02:36,152 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:02:36,152 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:02:36,152 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:36,152 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:02:36,152 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:02:36,152 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-12-16 10:02:36,152 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:02:36,152 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:02:36,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:36,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:36,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:36,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:02:36,196 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:02:36,196 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:02:36,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:36,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:36,198 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) [2021-12-16 10:02:36,200 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 [2021-12-16 10:02:36,201 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 [2021-12-16 10:02:36,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:02:36,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:02:36,210 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:02:36,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:02:36,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:02:36,227 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:02:36,228 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:02:36,238 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:02:36,241 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 10:02:36,241 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 10:02:36,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:02:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:02:36,243 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) [2021-12-16 10:02:36,244 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 [2021-12-16 10:02:36,246 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:02:36,246 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:02:36,246 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:02:36,246 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-16 10:02:36,262 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 [2021-12-16 10:02:36,262 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:02:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 10:02:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:36,403 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 [2021-12-16 10:02:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:02:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:36,469 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 [2021-12-16 10:02:36,469 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) [2021-12-16 10:02:36,510 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. [2021-12-16 10:02:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-12-16 10:02:36,511 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) [2021-12-16 10:02:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-12-16 10:02:36,512 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2021-12-16 10:02:36,512 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:36,512 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:02:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:02:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:36,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 10:02:36,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:02:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:02:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:02:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:02:36,684 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 [2021-12-16 10:02:36,684 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) [2021-12-16 10:02:36,744 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. [2021-12-16 10:02:36,745 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 [2021-12-16 10:02:36,745 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) [2021-12-16 10:02:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-12-16 10:02:36,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2021-12-16 10:02:36,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:36,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2021-12-16 10:02:36,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:36,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 8 letters. [2021-12-16 10:02:36,748 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:02:36,748 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 964 states and 1378 transitions. [2021-12-16 10:02:36,755 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-16 10:02:36,766 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 964 states to 888 states and 1297 transitions. [2021-12-16 10:02:36,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 290 [2021-12-16 10:02:36,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 318 [2021-12-16 10:02:36,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 888 states and 1297 transitions. [2021-12-16 10:02:36,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:02:36,770 INFO L681 BuchiCegarLoop]: Abstraction has 888 states and 1297 transitions. [2021-12-16 10:02:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states and 1297 transitions. [2021-12-16 10:02:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 875. [2021-12-16 10:02:36,790 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) [2021-12-16 10:02:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1280 transitions. [2021-12-16 10:02:36,795 INFO L704 BuchiCegarLoop]: Abstraction has 875 states and 1280 transitions. [2021-12-16 10:02:36,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:02:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 10:02:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-12-16 10:02:36,796 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) [2021-12-16 10:02:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:02:37,005 INFO L93 Difference]: Finished difference Result 475 states and 560 transitions. [2021-12-16 10:02:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 10:02:37,006 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 475 states and 560 transitions. [2021-12-16 10:02:37,010 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 10:02:37,010 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 475 states to 0 states and 0 transitions. [2021-12-16 10:02:37,010 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-16 10:02:37,010 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-16 10:02:37,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-16 10:02:37,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 10:02:37,011 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 10:02:37,011 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 10:02:37,011 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 10:02:37,011 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-16 10:02:37,011 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-16 10:02:37,011 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 10:02:37,011 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-16 10:02:37,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.12 10:02:37 BoogieIcfgContainer [2021-12-16 10:02:37,017 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-16 10:02:37,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 10:02:37,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 10:02:37,019 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 10:02:37,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:02:25" (3/4) ... [2021-12-16 10:02:37,023 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 10:02:37,024 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 10:02:37,024 INFO L158 Benchmark]: Toolchain (without parser) took 11814.98ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 74.4MB in the beginning and 63.2MB in the end (delta: 11.3MB). Peak memory consumption was 88.9MB. Max. memory is 16.1GB. [2021-12-16 10:02:37,025 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 10:02:37,025 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.18ms. Allocated memory is still 102.8MB. Free memory was 74.2MB in the beginning and 79.6MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 10:02:37,025 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.68ms. Allocated memory is still 102.8MB. Free memory was 79.6MB in the beginning and 78.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 10:02:37,026 INFO L158 Benchmark]: Boogie Preprocessor took 16.28ms. Allocated memory is still 102.8MB. Free memory was 78.3MB in the beginning and 77.6MB in the end (delta: 760.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 10:02:37,026 INFO L158 Benchmark]: RCFGBuilder took 174.26ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 69.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 10:02:37,026 INFO L158 Benchmark]: BuchiAutomizer took 11441.39ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 68.8MB in the beginning and 64.2MB in the end (delta: 4.6MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. [2021-12-16 10:02:37,026 INFO L158 Benchmark]: Witness Printer took 5.45ms. Allocated memory is still 180.4MB. Free memory was 64.2MB in the beginning and 63.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 10:02:37,028 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 102.8MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 151.18ms. Allocated memory is still 102.8MB. Free memory was 74.2MB in the beginning and 79.6MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.68ms. Allocated memory is still 102.8MB. Free memory was 79.6MB in the beginning and 78.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.28ms. Allocated memory is still 102.8MB. Free memory was 78.3MB in the beginning and 77.6MB in the end (delta: 760.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 174.26ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 69.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 11441.39ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 68.8MB in the beginning and 64.2MB in the end (delta: 4.6MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. * Witness Printer took 5.45ms. Allocated memory is still 180.4MB. Free memory was 64.2MB in the beginning and 63.2MB 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 11.4s and 7 iterations. TraceHistogramMax:12. Analysis of lassos took 6.6s. 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, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 392 mSDsCounter, 433 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1406 IncrementalHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 433 mSolverCounterUnsat, 219 mSDtfsCounter, 1406 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf92 smp82 dnf100 smp100 tf110 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-16 10:02:37,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:37,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-16 10:02:37,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-16 10:02:37,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 10:02:37,878 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