./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f4b24e32 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-simple/fibo_5-2.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 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 16:00:59,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 16:00:59,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 16:00:59,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 16:00:59,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 16:00:59,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 16:00:59,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 16:00:59,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 16:00:59,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 16:00:59,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 16:00:59,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 16:00:59,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 16:00:59,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 16:00:59,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 16:00:59,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 16:00:59,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 16:00:59,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 16:00:59,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 16:00:59,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 16:00:59,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 16:00:59,304 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 16:00:59,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 16:00:59,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 16:00:59,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 16:00:59,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 16:00:59,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 16:00:59,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 16:00:59,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 16:00:59,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 16:00:59,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 16:00:59,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 16:00:59,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 16:00:59,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 16:00:59,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 16:00:59,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 16:00:59,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 16:00:59,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 16:00:59,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 16:00:59,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 16:00:59,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 16:00:59,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 16:00:59,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 16:00:59,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-14 16:00:59,347 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 16:00:59,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 16:00:59,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 16:00:59,349 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 16:00:59,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 16:00:59,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 16:00:59,350 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 16:00:59,351 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-14 16:00:59,351 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-14 16:00:59,352 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-14 16:00:59,352 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-14 16:00:59,352 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-14 16:00:59,352 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-14 16:00:59,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 16:00:59,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 16:00:59,352 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 16:00:59,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 16:00:59,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 16:00:59,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 16:00:59,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-14 16:00:59,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-14 16:00:59,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-14 16:00:59,354 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 16:00:59,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 16:00:59,354 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-14 16:00:59,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 16:00:59,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-14 16:00:59,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 16:00:59,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 16:00:59,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 16:00:59,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 16:00:59,355 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-14 16:00:59,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 [2022-07-14 16:00:59,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 16:00:59,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 16:00:59,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 16:00:59,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 16:00:59,572 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 16:00:59,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2022-07-14 16:00:59,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a8481b4/ab7752edffce4579b217aff0d0970bcf/FLAG9c71a6413 [2022-07-14 16:01:00,042 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 16:01:00,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2022-07-14 16:01:00,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a8481b4/ab7752edffce4579b217aff0d0970bcf/FLAG9c71a6413 [2022-07-14 16:01:00,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a8481b4/ab7752edffce4579b217aff0d0970bcf [2022-07-14 16:01:00,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 16:01:00,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 16:01:00,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 16:01:00,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 16:01:00,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 16:01:00,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164eee5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00, skipping insertion in model container [2022-07-14 16:01:00,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 16:01:00,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 16:01:00,235 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-simple/fibo_5-2.c[740,753] [2022-07-14 16:01:00,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 16:01:00,243 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 16:01:00,251 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-simple/fibo_5-2.c[740,753] [2022-07-14 16:01:00,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 16:01:00,263 INFO L208 MainTranslator]: Completed translation [2022-07-14 16:01:00,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00 WrapperNode [2022-07-14 16:01:00,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 16:01:00,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 16:01:00,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 16:01:00,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 16:01:00,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,283 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-14 16:01:00,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 16:01:00,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 16:01:00,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 16:01:00,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 16:01:00,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 16:01:00,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 16:01:00,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 16:01:00,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 16:01:00,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (1/1) ... [2022-07-14 16:01:00,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:00,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:00,323 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) [2022-07-14 16:01:00,329 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 [2022-07-14 16:01:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 16:01:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 16:01:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 16:01:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 16:01:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-07-14 16:01:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-07-14 16:01:00,390 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 16:01:00,391 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 16:01:00,464 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 16:01:00,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 16:01:00,468 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 16:01:00,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:01:00 BoogieIcfgContainer [2022-07-14 16:01:00,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 16:01:00,470 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-14 16:01:00,470 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-14 16:01:00,473 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-14 16:01:00,473 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:01:00,473 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.07 04:01:00" (1/3) ... [2022-07-14 16:01:00,474 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@164b06a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 04:01:00, skipping insertion in model container [2022-07-14 16:01:00,474 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:01:00,474 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:01:00" (2/3) ... [2022-07-14 16:01:00,474 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@164b06a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 04:01:00, skipping insertion in model container [2022-07-14 16:01:00,475 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:01:00,475 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:01:00" (3/3) ... [2022-07-14 16:01:00,476 INFO L354 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2022-07-14 16:01:00,509 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-14 16:01:00,509 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-14 16:01:00,509 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-14 16:01:00,509 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-14 16:01:00,509 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-14 16:01:00,509 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-14 16:01:00,510 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-14 16:01:00,510 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-14 16:01:00,512 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-14 16:01:00,524 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:00,525 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:00,525 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:00,529 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 16:01:00,529 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:01:00,529 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-14 16:01:00,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-14 16:01:00,531 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:00,531 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:00,531 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:00,531 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 16:01:00,532 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:01:00,536 INFO L752 eck$LassoCheckResult]: Stem: 3#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(11, 2);call #Ultimate.allocInit(12, 3); 12#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 := 5; 5#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 6#fiboENTRYtrue [2022-07-14 16:01:00,536 INFO L754 eck$LassoCheckResult]: Loop: 6#fiboENTRYtrue ~n := #in~n; 7#L8true assume !(~n < 1); 9#L10true assume !(1 == ~n); 14#L13true call #t~ret4 := fibo(~n - 1);< 6#fiboENTRYtrue [2022-07-14 16:01:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2022-07-14 16:01:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48906868] [2022-07-14 16:01:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:00,609 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:00,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2022-07-14 16:01:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:00,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576749901] [2022-07-14 16:01:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:00,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:00,652 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:00,657 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2022-07-14 16:01:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:00,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902718720] [2022-07-14 16:01:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:00,681 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:00,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:00,815 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:00,828 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:00,828 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:00,828 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:00,828 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:01:00,829 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:00,829 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:00,829 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:00,829 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2022-07-14 16:01:00,829 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:00,829 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:00,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:00,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:00,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:00,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:00,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:00,910 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:00,911 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:01:00,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:00,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:00,915 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) [2022-07-14 16:01:00,916 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 [2022-07-14 16:01:00,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:00,917 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:00,938 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:00,938 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:00,957 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 [2022-07-14 16:01:00,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:00,958 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) [2022-07-14 16:01:00,960 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 [2022-07-14 16:01:00,961 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:00,961 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:00,982 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:00,982 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:01,000 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 [2022-07-14 16:01:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,005 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) [2022-07-14 16:01:01,007 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 [2022-07-14 16:01:01,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:01,030 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:01,043 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:01,043 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:01,077 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 [2022-07-14 16:01:01,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,086 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) [2022-07-14 16:01:01,154 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 [2022-07-14 16:01:01,155 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:01,155 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:01,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:01,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,197 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) [2022-07-14 16:01:01,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:01:01,205 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:01,227 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 [2022-07-14 16:01:01,256 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:01:01,260 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 [2022-07-14 16:01:01,260 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:01,260 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:01,260 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:01,260 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:01,260 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:01:01,260 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,260 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:01,260 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:01,260 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2022-07-14 16:01:01,261 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:01,261 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:01,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:01,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:01,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:01,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:01,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:01,328 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:01,331 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:01:01,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,333 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) [2022-07-14 16:01:01,335 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 [2022-07-14 16:01:01,336 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 [2022-07-14 16:01:01,342 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:01,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:01,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:01,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:01,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:01,344 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:01,344 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:01,360 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:01,375 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 [2022-07-14 16:01:01,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,377 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) [2022-07-14 16:01:01,378 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 [2022-07-14 16:01:01,379 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 [2022-07-14 16:01:01,384 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:01,385 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:01,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:01,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:01,385 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:01,385 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:01,385 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:01,401 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:01,416 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 [2022-07-14 16:01:01,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,418 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) [2022-07-14 16:01:01,419 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 [2022-07-14 16:01:01,420 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 [2022-07-14 16:01:01,426 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:01,426 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:01,426 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:01,426 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:01,426 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:01,426 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:01,426 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:01,442 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:01,457 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 [2022-07-14 16:01:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,459 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) [2022-07-14 16:01:01,460 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 [2022-07-14 16:01:01,461 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 [2022-07-14 16:01:01,467 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:01,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:01,467 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:01,467 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:01,467 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:01,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:01,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:01,480 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:01:01,484 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:01:01,485 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:01:01,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:01,487 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) [2022-07-14 16:01:01,488 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 [2022-07-14 16:01:01,532 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:01:01,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:01:01,532 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:01:01,532 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-14 16:01:01,551 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 [2022-07-14 16:01:01,553 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:01:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 16:01:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:01,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:01:01,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:01,661 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 [2022-07-14 16:01:01,662 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-14 16:01:01,739 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 48 states and 60 transitions. Complement of second has 12 states. [2022-07-14 16:01:01,748 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 [2022-07-14 16:01:01,752 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) [2022-07-14 16:01:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2022-07-14 16:01:01,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-14 16:01:01,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:01,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-14 16:01:01,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:01,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-14 16:01:01,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:01,755 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2022-07-14 16:01:01,774 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:01,778 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2022-07-14 16:01:01,778 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-14 16:01:01,778 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-14 16:01:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2022-07-14 16:01:01,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:01,779 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-14 16:01:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2022-07-14 16:01:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-14 16:01:01,808 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) [2022-07-14 16:01:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-14 16:01:01,809 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-14 16:01:01,809 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-14 16:01:01,810 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-14 16:01:01,810 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2022-07-14 16:01:01,810 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:01,810 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:01,810 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:01,827 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:01,827 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:01,828 INFO L752 eck$LassoCheckResult]: Stem: 122#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(11, 2);call #Ultimate.allocInit(12, 3); 123#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 := 5; 128#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret4 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2022-07-14 16:01:01,828 INFO L754 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret4 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2022-07-14 16:01:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2022-07-14 16:01:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:01,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971951438] [2022-07-14 16:01:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 16:01:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 16:01:01,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971951438] [2022-07-14 16:01:01,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971951438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 16:01:01,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 16:01:01,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 16:01:01,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249647926] [2022-07-14 16:01:01,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 16:01:01,920 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:01:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2022-07-14 16:01:01,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929245897] [2022-07-14 16:01:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:01,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-14 16:01:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 16:01:01,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929245897] [2022-07-14 16:01:01,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929245897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 16:01:01,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 16:01:01,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 16:01:01,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887806400] [2022-07-14 16:01:01,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 16:01:01,953 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 16:01:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:01:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 16:01:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 16:01:01,963 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) [2022-07-14 16:01:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:01:02,005 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-14 16:01:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 16:01:02,006 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2022-07-14 16:01:02,007 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:02,008 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2022-07-14 16:01:02,008 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-14 16:01:02,009 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-07-14 16:01:02,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2022-07-14 16:01:02,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:02,009 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-14 16:01:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2022-07-14 16:01:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-14 16:01:02,011 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) [2022-07-14 16:01:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-14 16:01:02,012 INFO L392 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-14 16:01:02,012 INFO L374 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-14 16:01:02,012 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-14 16:01:02,012 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2022-07-14 16:01:02,013 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:02,013 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:02,013 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:02,013 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:02,013 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:02,013 INFO L752 eck$LassoCheckResult]: Stem: 195#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(11, 2);call #Ultimate.allocInit(12, 3); 196#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 := 5; 201#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret4 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2022-07-14 16:01:02,013 INFO L754 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret5 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret4 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2022-07-14 16:01:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:02,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2022-07-14 16:01:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:02,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118288016] [2022-07-14 16:01:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:02,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 16:01:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118288016] [2022-07-14 16:01:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118288016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:01:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855312028] [2022-07-14 16:01:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:02,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:01:02,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:02,098 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) [2022-07-14 16:01:02,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 16:01:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:01:02,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:01:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:02,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855312028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:01:02,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:01:02,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-14 16:01:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052208942] [2022-07-14 16:01:02,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:01:02,282 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:01:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2022-07-14 16:01:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643278669] [2022-07-14 16:01:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:02,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:02,287 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:02,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:02,406 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:02,406 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:02,406 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:02,406 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:02,406 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:01:02,406 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:02,406 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:02,406 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:02,406 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2022-07-14 16:01:02,406 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:02,406 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:02,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:02,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:02,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:02,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:02,458 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:02,458 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:01:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:02,472 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) [2022-07-14 16:01:02,484 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 [2022-07-14 16:01:02,485 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:02,485 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:02,492 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:02,492 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:02,536 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 [2022-07-14 16:01:02,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:02,537 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) [2022-07-14 16:01:02,539 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 [2022-07-14 16:01:02,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:02,540 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:02,546 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:02,546 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:02,563 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 [2022-07-14 16:01:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:02,564 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) [2022-07-14 16:01:02,565 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 [2022-07-14 16:01:02,566 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:02,566 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:02,600 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 [2022-07-14 16:01:02,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:02,602 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) [2022-07-14 16:01:02,603 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 [2022-07-14 16:01:02,604 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:01:02,604 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:03,396 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:01:03,400 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 [2022-07-14 16:01:03,400 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:03,400 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:03,400 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:03,400 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:03,400 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:01:03,400 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:03,401 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:03,401 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:03,401 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2022-07-14 16:01:03,401 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:03,401 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:03,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:03,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:03,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:03,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:03,439 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:03,439 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:01:03,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:03,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:03,453 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) [2022-07-14 16:01:03,453 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 [2022-07-14 16:01:03,455 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 [2022-07-14 16:01:03,460 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:03,460 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:03,460 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:03,460 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:03,460 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:03,461 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:03,461 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:03,475 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:03,503 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 [2022-07-14 16:01:03,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:03,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:03,505 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) [2022-07-14 16:01:03,523 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 [2022-07-14 16:01:03,528 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:03,528 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:03,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:03,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:03,529 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:03,529 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:03,529 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:03,532 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 [2022-07-14 16:01:03,539 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:03,567 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 [2022-07-14 16:01:03,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:03,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:03,586 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) [2022-07-14 16:01:03,587 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 [2022-07-14 16:01:03,588 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 [2022-07-14 16:01:03,594 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:03,594 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:03,594 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:03,594 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:03,594 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:03,595 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:03,595 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:03,611 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:01:03,613 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:01:03,613 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:01:03,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:03,615 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) [2022-07-14 16:01:03,621 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:01:03,621 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:01:03,621 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:01:03,621 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-14 16:01:03,635 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 [2022-07-14 16:01:03,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:03,647 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:01:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:01:03,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:03,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 16:01:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:03,857 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 [2022-07-14 16:01:03,857 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) [2022-07-14 16:01:04,020 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. [2022-07-14 16:01:04,021 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 [2022-07-14 16:01:04,021 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) [2022-07-14 16:01:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-14 16:01:04,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2022-07-14 16:01:04,022 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:04,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2022-07-14 16:01:04,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:04,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2022-07-14 16:01:04,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:04,023 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2022-07-14 16:01:04,028 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-14 16:01:04,036 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2022-07-14 16:01:04,037 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2022-07-14 16:01:04,037 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2022-07-14 16:01:04,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2022-07-14 16:01:04,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:04,037 INFO L369 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-07-14 16:01:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2022-07-14 16:01:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-14 16:01:04,056 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) [2022-07-14 16:01:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-14 16:01:04,057 INFO L392 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-14 16:01:04,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:01:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 16:01:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 16:01:04,058 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) [2022-07-14 16:01:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:01:04,146 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2022-07-14 16:01:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 16:01:04,147 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2022-07-14 16:01:04,150 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-14 16:01:04,152 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2022-07-14 16:01:04,152 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2022-07-14 16:01:04,160 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2022-07-14 16:01:04,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2022-07-14 16:01:04,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:04,161 INFO L369 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-07-14 16:01:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2022-07-14 16:01:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-07-14 16:01:04,180 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) [2022-07-14 16:01:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-07-14 16:01:04,181 INFO L392 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-14 16:01:04,181 INFO L374 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-14 16:01:04,181 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-14 16:01:04,181 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2022-07-14 16:01:04,182 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-14 16:01:04,182 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:04,182 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:04,183 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:04,183 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2022-07-14 16:01:04,183 INFO L752 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2022-07-14 16:01:04,184 INFO L754 eck$LassoCheckResult]: Loop: 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#33#return; 824#L13-1 [2022-07-14 16:01:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2022-07-14 16:01:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864851476] [2022-07-14 16:01:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:04,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:04,208 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:04,227 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:04,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2022-07-14 16:01:04,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:04,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529251163] [2022-07-14 16:01:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:04,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-14 16:01:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:01:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:01:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 16:01:04,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529251163] [2022-07-14 16:01:04,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529251163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:01:04,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464791171] [2022-07-14 16:01:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:04,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:01:04,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:04,309 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 16:01:04,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 16:01:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:01:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 16:01:04,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:01:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 16:01:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464791171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:01:04,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:01:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-14 16:01:04,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760821273] [2022-07-14 16:01:04,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:01:04,483 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 16:01:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:01:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 16:01:04,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-14 16:01:04,484 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-14 16:01:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:01:04,584 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-07-14 16:01:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 16:01:04,585 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 60 states and 77 transitions. [2022-07-14 16:01:04,586 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:04,589 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 60 states to 54 states and 70 transitions. [2022-07-14 16:01:04,589 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2022-07-14 16:01:04,589 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2022-07-14 16:01:04,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 70 transitions. [2022-07-14 16:01:04,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:04,589 INFO L369 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-07-14 16:01:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 70 transitions. [2022-07-14 16:01:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-14 16:01:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-14 16:01:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-07-14 16:01:04,592 INFO L392 hiAutomatonCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-07-14 16:01:04,592 INFO L374 stractBuchiCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-07-14 16:01:04,592 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-14 16:01:04,592 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 70 transitions. [2022-07-14 16:01:04,593 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:04,593 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:04,593 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:04,594 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:04,594 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2022-07-14 16:01:04,594 INFO L752 eck$LassoCheckResult]: Stem: 1241#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(11, 2);call #Ultimate.allocInit(12, 3); 1242#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 := 5; 1254#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1255#fiboENTRY ~n := #in~n; 1273#L8 assume !(~n < 1); 1272#L10 assume !(1 == ~n); 1247#L13 call #t~ret4 := fibo(~n - 1);< 1259#fiboENTRY ~n := #in~n; 1260#L8 assume !(~n < 1); 1266#L10 assume !(1 == ~n); 1246#L13 call #t~ret4 := fibo(~n - 1);< 1248#fiboENTRY ~n := #in~n; 1271#L8 assume !(~n < 1); 1289#L10 assume !(1 == ~n); 1263#L13 call #t~ret4 := fibo(~n - 1);< 1248#fiboENTRY ~n := #in~n; 1271#L8 assume !(~n < 1); 1289#L10 assume !(1 == ~n); 1263#L13 call #t~ret4 := fibo(~n - 1);< 1248#fiboENTRY ~n := #in~n; 1270#L8 assume !(~n < 1); 1267#L10 assume 1 == ~n;#res := 1; 1268#fiboFINAL assume true; 1262#fiboEXIT >#33#return; 1264#L13-1 call #t~ret5 := fibo(~n - 2);< 1288#fiboENTRY ~n := #in~n; 1294#L8 assume ~n < 1;#res := 0; 1293#fiboFINAL assume true; 1287#fiboEXIT >#35#return; 1285#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1283#fiboFINAL assume true; 1280#fiboEXIT >#33#return; 1252#L13-1 [2022-07-14 16:01:04,594 INFO L754 eck$LassoCheckResult]: Loop: 1252#L13-1 call #t~ret5 := fibo(~n - 2);< 1245#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1275#L10 assume !(1 == ~n); 1251#L13 call #t~ret4 := fibo(~n - 1);< 1245#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1275#L10 assume !(1 == ~n); 1251#L13 call #t~ret4 := fibo(~n - 1);< 1245#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1275#L10 assume !(1 == ~n); 1251#L13 call #t~ret4 := fibo(~n - 1);< 1245#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1275#L10 assume 1 == ~n;#res := 1; 1290#fiboFINAL assume true; 1291#fiboEXIT >#33#return; 1257#L13-1 call #t~ret5 := fibo(~n - 2);< 1256#fiboENTRY ~n := #in~n; 1258#L8 assume ~n < 1;#res := 0; 1265#fiboFINAL assume true; 1286#fiboEXIT >#35#return; 1249#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1253#fiboFINAL assume true; 1261#fiboEXIT >#33#return; 1252#L13-1 call #t~ret5 := fibo(~n - 2);< 1245#fiboENTRY ~n := #in~n; 1274#L8 assume ~n < 1;#res := 0; 1265#fiboFINAL assume true; 1286#fiboEXIT >#35#return; 1278#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1284#fiboFINAL assume true; 1281#fiboEXIT >#33#return; 1252#L13-1 [2022-07-14 16:01:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2022-07-14 16:01:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:04,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904347220] [2022-07-14 16:01:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:04,610 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:04,618 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash -176759904, now seen corresponding path program 2 times [2022-07-14 16:01:04,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:04,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770554394] [2022-07-14 16:01:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:04,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-14 16:01:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:01:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-14 16:01:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 16:01:04,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:04,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770554394] [2022-07-14 16:01:04,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770554394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:01:04,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388153698] [2022-07-14 16:01:04,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 16:01:04,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:01:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:04,704 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 16:01:04,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 16:01:04,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 16:01:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 16:01:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 16:01:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 16:01:04,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:01:04,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 16:01:04,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388153698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:01:04,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:01:04,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 14 [2022-07-14 16:01:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553539199] [2022-07-14 16:01:04,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:01:04,963 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 16:01:04,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:01:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 16:01:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-14 16:01:04,964 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. cyclomatic complexity: 18 Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-14 16:01:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:01:05,014 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-07-14 16:01:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 16:01:05,015 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 67 transitions. [2022-07-14 16:01:05,016 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:05,016 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 54 states and 67 transitions. [2022-07-14 16:01:05,016 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2022-07-14 16:01:05,017 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2022-07-14 16:01:05,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 67 transitions. [2022-07-14 16:01:05,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:05,017 INFO L369 hiAutomatonCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-14 16:01:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states and 67 transitions. [2022-07-14 16:01:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-14 16:01:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 37 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-07-14 16:01:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-14 16:01:05,020 INFO L392 hiAutomatonCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-14 16:01:05,020 INFO L374 stractBuchiCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-14 16:01:05,020 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-14 16:01:05,020 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 67 transitions. [2022-07-14 16:01:05,021 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:01:05,021 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:05,021 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:05,022 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:05,022 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 16:01:05,022 INFO L752 eck$LassoCheckResult]: Stem: 1628#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 1629#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 1641#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1642#fiboENTRY ~n := #in~n; 1661#L8 assume !(~n < 1); 1660#L10 assume !(1 == ~n); 1634#L13 call #t~ret4 := fibo(~n - 1);< 1646#fiboENTRY ~n := #in~n; 1647#L8 assume !(~n < 1); 1652#L10 assume !(1 == ~n); 1633#L13 call #t~ret4 := fibo(~n - 1);< 1635#fiboENTRY ~n := #in~n; 1659#L8 assume !(~n < 1); 1678#L10 assume !(1 == ~n); 1651#L13 call #t~ret4 := fibo(~n - 1);< 1635#fiboENTRY ~n := #in~n; 1659#L8 assume !(~n < 1); 1678#L10 assume !(1 == ~n); 1651#L13 call #t~ret4 := fibo(~n - 1);< 1635#fiboENTRY ~n := #in~n; 1658#L8 assume !(~n < 1); 1653#L10 assume 1 == ~n;#res := 1; 1654#fiboFINAL assume true; 1650#fiboEXIT >#33#return; 1644#L13-1 call #t~ret5 := fibo(~n - 2);< 1643#fiboENTRY ~n := #in~n; 1645#L8 assume ~n < 1;#res := 0; 1648#fiboFINAL assume true; 1649#fiboEXIT >#35#return; 1673#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1670#fiboFINAL assume true; 1667#fiboEXIT >#33#return; 1637#L13-1 [2022-07-14 16:01:05,022 INFO L754 eck$LassoCheckResult]: Loop: 1637#L13-1 call #t~ret5 := fibo(~n - 2);< 1632#fiboENTRY ~n := #in~n; 1677#L8 assume !(~n < 1); 1676#L10 assume !(1 == ~n); 1639#L13 call #t~ret4 := fibo(~n - 1);< 1632#fiboENTRY ~n := #in~n; 1677#L8 assume !(~n < 1); 1676#L10 assume !(1 == ~n); 1639#L13 call #t~ret4 := fibo(~n - 1);< 1632#fiboENTRY ~n := #in~n; 1677#L8 assume !(~n < 1); 1676#L10 assume 1 == ~n;#res := 1; 1675#fiboFINAL assume true; 1674#fiboEXIT >#33#return; 1655#L13-1 call #t~ret5 := fibo(~n - 2);< 1656#fiboENTRY ~n := #in~n; 1681#L8 assume ~n < 1;#res := 0; 1680#fiboFINAL assume true; 1679#fiboEXIT >#35#return; 1636#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1640#fiboFINAL assume true; 1664#fiboEXIT >#33#return; 1637#L13-1 [2022-07-14 16:01:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 3 times [2022-07-14 16:01:05,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:05,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163183008] [2022-07-14 16:01:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:05,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:05,029 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:05,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 3 times [2022-07-14 16:01:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:05,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708152568] [2022-07-14 16:01:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:05,040 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:05,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1975410011, now seen corresponding path program 4 times [2022-07-14 16:01:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:05,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518273849] [2022-07-14 16:01:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 16:01:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:01:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-14 16:01:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:01:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 34 proven. 64 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-14 16:01:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518273849] [2022-07-14 16:01:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518273849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:01:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605467215] [2022-07-14 16:01:05,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 16:01:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:01:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:05,187 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) [2022-07-14 16:01:05,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 16:01:05,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 16:01:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 16:01:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 16:01:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-14 16:01:05,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:01:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-14 16:01:05,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605467215] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:01:05,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:01:05,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2022-07-14 16:01:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999935616] [2022-07-14 16:01:05,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:01:05,489 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:05,489 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:05,489 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:05,489 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:05,489 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:01:05,489 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:05,489 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:05,489 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:05,489 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2022-07-14 16:01:05,489 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:05,489 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:05,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:05,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:05,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:05,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:05,526 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:05,527 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:01:05,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:05,537 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) [2022-07-14 16:01:05,539 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 [2022-07-14 16:01:05,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:05,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:05,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:05,591 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) [2022-07-14 16:01:05,592 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 [2022-07-14 16:01:05,594 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:01:05,594 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:06,577 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:01:06,585 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 [2022-07-14 16:01:06,586 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:06,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:06,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:06,586 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:06,586 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:01:06,586 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:06,586 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:06,586 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:06,586 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2022-07-14 16:01:06,586 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:06,586 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:06,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:06,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:06,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:06,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:06,637 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:06,639 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:01:06,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:06,651 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) [2022-07-14 16:01:06,652 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 [2022-07-14 16:01:06,652 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 [2022-07-14 16:01:06,658 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:06,658 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:06,658 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:06,658 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:06,658 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:06,659 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:06,659 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:06,661 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:06,711 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 [2022-07-14 16:01:06,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:06,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:06,719 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) [2022-07-14 16:01:06,720 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 [2022-07-14 16:01:06,737 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 [2022-07-14 16:01:06,744 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:06,744 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:06,744 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:06,744 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:06,744 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:06,745 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:06,745 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:06,758 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:06,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2022-07-14 16:01:06,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:06,777 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) [2022-07-14 16:01:06,779 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 [2022-07-14 16:01:06,780 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 [2022-07-14 16:01:06,785 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:06,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:06,785 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:06,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:06,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:06,786 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:06,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:06,787 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:06,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2022-07-14 16:01:06,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:06,832 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) [2022-07-14 16:01:06,833 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 [2022-07-14 16:01:06,834 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 [2022-07-14 16:01:06,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:06,840 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:06,840 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:06,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:06,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:06,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:06,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:06,856 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:01:06,859 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:01:06,859 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:01:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:06,861 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) [2022-07-14 16:01:06,862 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 [2022-07-14 16:01:06,862 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:01:06,862 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:01:06,863 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:01:06,863 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-14 16:01:06,903 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 [2022-07-14 16:01:06,904 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:01:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 16:01:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:07,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:01:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:01:07,246 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:01:07,246 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 67 transitions. cyclomatic complexity: 15 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:01:07,296 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 67 transitions. cyclomatic complexity: 15. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 61 states and 74 transitions. Complement of second has 11 states. [2022-07-14 16:01:07,297 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 [2022-07-14 16:01:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:01:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2022-07-14 16:01:07,298 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2022-07-14 16:01:07,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:07,298 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:01:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 16:01:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:01:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:01:07,539 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:01:07,540 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 67 transitions. cyclomatic complexity: 15 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:01:07,601 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 67 transitions. cyclomatic complexity: 15. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 61 states and 74 transitions. Complement of second has 11 states. [2022-07-14 16:01:07,601 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 [2022-07-14 16:01:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:01:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2022-07-14 16:01:07,604 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 32 letters. Loop has 22 letters. [2022-07-14 16:01:07,604 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:07,604 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:01:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 16:01:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:07,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:01:07,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:01:07,873 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:01:07,873 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 67 transitions. cyclomatic complexity: 15 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:01:08,052 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 67 transitions. cyclomatic complexity: 15. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 321 states and 401 transitions. Complement of second has 122 states. [2022-07-14 16:01:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-14 16:01:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:01:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2022-07-14 16:01:08,054 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 22 letters. [2022-07-14 16:01:08,056 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:08,056 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 54 letters. Loop has 22 letters. [2022-07-14 16:01:08,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:08,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 44 letters. [2022-07-14 16:01:08,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:08,059 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 321 states and 401 transitions. [2022-07-14 16:01:08,073 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-14 16:01:08,076 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 321 states to 203 states and 261 transitions. [2022-07-14 16:01:08,076 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2022-07-14 16:01:08,076 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2022-07-14 16:01:08,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 261 transitions. [2022-07-14 16:01:08,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:08,076 INFO L369 hiAutomatonCegarLoop]: Abstraction has 203 states and 261 transitions. [2022-07-14 16:01:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 261 transitions. [2022-07-14 16:01:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2022-07-14 16:01:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 116 states have internal predecessors, (124), 39 states have call successors, (39), 24 states have call predecessors, (39), 27 states have return successors, (49), 34 states have call predecessors, (49), 34 states have call successors, (49) [2022-07-14 16:01:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2022-07-14 16:01:08,103 INFO L392 hiAutomatonCegarLoop]: Abstraction has 175 states and 212 transitions. [2022-07-14 16:01:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:01:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 16:01:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-14 16:01:08,104 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-14 16:01:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:01:08,231 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2022-07-14 16:01:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 16:01:08,232 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 140 transitions. [2022-07-14 16:01:08,233 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-07-14 16:01:08,234 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 105 states and 117 transitions. [2022-07-14 16:01:08,235 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2022-07-14 16:01:08,235 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 64 [2022-07-14 16:01:08,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 117 transitions. [2022-07-14 16:01:08,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:01:08,236 INFO L369 hiAutomatonCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-07-14 16:01:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 117 transitions. [2022-07-14 16:01:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2022-07-14 16:01:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2022-07-14 16:01:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2022-07-14 16:01:08,256 INFO L392 hiAutomatonCegarLoop]: Abstraction has 96 states and 108 transitions. [2022-07-14 16:01:08,256 INFO L374 stractBuchiCegarLoop]: Abstraction has 96 states and 108 transitions. [2022-07-14 16:01:08,256 INFO L287 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-07-14 16:01:08,256 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 108 transitions. [2022-07-14 16:01:08,256 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-07-14 16:01:08,257 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:01:08,257 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:01:08,259 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [7, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:01:08,259 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:01:08,260 INFO L752 eck$LassoCheckResult]: Stem: 3515#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 3516#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 5; 3531#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 3532#fiboENTRY ~n := #in~n; 3571#L8 assume !(~n < 1); 3570#L10 assume !(1 == ~n); 3545#L13 call #t~ret4 := fibo(~n - 1);< 3569#fiboENTRY ~n := #in~n; 3568#L8 assume !(~n < 1); 3567#L10 assume !(1 == ~n); 3522#L13 call #t~ret4 := fibo(~n - 1);< 3523#fiboENTRY ~n := #in~n; 3577#L8 assume !(~n < 1); 3552#L10 assume !(1 == ~n); 3521#L13 call #t~ret4 := fibo(~n - 1);< 3523#fiboENTRY ~n := #in~n; 3578#L8 assume !(~n < 1); 3588#L10 assume 1 == ~n;#res := 1; 3586#fiboFINAL assume true; 3583#fiboEXIT >#33#return; 3584#L13-1 call #t~ret5 := fibo(~n - 2);< 3600#fiboENTRY ~n := #in~n; 3602#L8 assume ~n < 1;#res := 0; 3601#fiboFINAL assume true; 3599#fiboEXIT >#35#return; 3598#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3597#fiboFINAL assume true; 3566#fiboEXIT >#33#return; 3525#L13-1 call #t~ret5 := fibo(~n - 2);< 3565#fiboENTRY ~n := #in~n; 3564#L8 assume !(~n < 1); 3563#L10 assume !(1 == ~n); 3518#L13 call #t~ret4 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3606#L8 assume !(~n < 1); 3605#L10 assume !(1 == ~n); 3517#L13 [2022-07-14 16:01:08,260 INFO L754 eck$LassoCheckResult]: Loop: 3517#L13 call #t~ret4 := fibo(~n - 1);< 3520#fiboENTRY ~n := #in~n; 3610#L8 assume !(~n < 1); 3551#L10 assume !(1 == ~n); 3517#L13 [2022-07-14 16:01:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2096320921, now seen corresponding path program 5 times [2022-07-14 16:01:08,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119447358] [2022-07-14 16:01:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-14 16:01:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:01:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:01:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 16:01:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:01:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119447358] [2022-07-14 16:01:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119447358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:01:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831273221] [2022-07-14 16:01:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 16:01:08,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:01:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:08,352 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 16:01:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 16:01:08,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-14 16:01:08,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 16:01:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 16:01:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 16:01:08,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:01:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 16:01:08,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831273221] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:01:08,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:01:08,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 18 [2022-07-14 16:01:08,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966973334] [2022-07-14 16:01:08,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:01:08,524 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:01:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:08,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 2 times [2022-07-14 16:01:08,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:01:08,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602469485] [2022-07-14 16:01:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:01:08,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:01:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:08,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:01:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:01:08,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:01:08,558 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:08,558 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:08,558 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:08,559 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:08,559 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:01:08,559 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:08,559 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:08,559 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:08,559 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2022-07-14 16:01:08,559 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:08,559 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:08,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:08,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:08,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:08,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:08,590 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:08,590 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:01:08,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:08,607 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) [2022-07-14 16:01:08,617 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:08,617 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:08,626 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 [2022-07-14 16:01:08,639 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:08,640 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:08,654 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 [2022-07-14 16:01:08,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:08,656 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) [2022-07-14 16:01:08,657 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 [2022-07-14 16:01:08,658 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:08,658 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:08,664 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:08,664 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:08,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2022-07-14 16:01:08,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:08,680 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:01:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-07-14 16:01:08,682 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:08,682 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:08,688 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:01:08,688 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:01:08,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:08,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:08,705 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) [2022-07-14 16:01:08,706 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 [2022-07-14 16:01:08,709 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:01:08,709 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:08,744 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 [2022-07-14 16:01:08,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:08,746 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) [2022-07-14 16:01:08,748 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 [2022-07-14 16:01:08,749 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:01:08,749 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:01:10,461 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:01:10,465 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 [2022-07-14 16:01:10,465 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:01:10,465 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:01:10,465 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:01:10,465 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:01:10,465 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:01:10,466 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:10,466 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:01:10,466 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:01:10,466 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration7_Loop [2022-07-14 16:01:10,466 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:01:10,466 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:01:10,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:10,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:10,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:10,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:01:10,517 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:01:10,517 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:01:10,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:10,519 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) [2022-07-14 16:01:10,520 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 [2022-07-14 16:01:10,521 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 [2022-07-14 16:01:10,526 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:10,526 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:10,526 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:10,527 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:10,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:10,527 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:10,527 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:10,528 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:01:10,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2022-07-14 16:01:10,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:10,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:10,552 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) [2022-07-14 16:01:10,554 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 [2022-07-14 16:01:10,555 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 [2022-07-14 16:01:10,560 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:01:10,560 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:01:10,560 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:01:10,560 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:01:10,560 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:01:10,561 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:01:10,561 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:01:10,563 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:01:10,566 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:01:10,566 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:01:10,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:01:10,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:01:10,575 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) [2022-07-14 16:01:10,577 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 [2022-07-14 16:01:10,578 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:01:10,578 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:01:10,578 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:01:10,578 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-14 16:01:10,608 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 [2022-07-14 16:01:10,608 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:01:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 16:01:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:10,797 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 [2022-07-14 16:01:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:10,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:01:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:10,856 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 [2022-07-14 16:01:10,856 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 96 states and 108 transitions. cyclomatic complexity: 15 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:01:10,886 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 96 states and 108 transitions. cyclomatic complexity: 15. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 105 states and 118 transitions. Complement of second has 18 states. [2022-07-14 16:01:10,886 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 [2022-07-14 16:01:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:01:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2022-07-14 16:01:10,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2022-07-14 16:01:10,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:10,887 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:01:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 16:01:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:01:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:11,054 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 [2022-07-14 16:01:11,054 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 96 states and 108 transitions. cyclomatic complexity: 15 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:01:11,098 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 96 states and 108 transitions. cyclomatic complexity: 15. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 111 states and 124 transitions. Complement of second has 17 states. [2022-07-14 16:01:11,098 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 [2022-07-14 16:01:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:01:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2022-07-14 16:01:11,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2022-07-14 16:01:11,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:11,099 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:01:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:01:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 16:01:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:01:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:01:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:01:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:01:11,266 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-14 16:01:11,266 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 96 states and 108 transitions. cyclomatic complexity: 15 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:01:11,301 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 96 states and 108 transitions. cyclomatic complexity: 15. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 131 states and 150 transitions. Complement of second has 27 states. [2022-07-14 16:01:11,302 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 [2022-07-14 16:01:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:01:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2022-07-14 16:01:11,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 36 letters. Loop has 4 letters. [2022-07-14 16:01:11,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:11,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 40 letters. Loop has 4 letters. [2022-07-14 16:01:11,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:11,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 36 letters. Loop has 8 letters. [2022-07-14 16:01:11,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:01:11,303 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 131 states and 150 transitions. [2022-07-14 16:01:11,304 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:01:11,304 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 131 states to 0 states and 0 transitions. [2022-07-14 16:01:11,304 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-14 16:01:11,304 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-14 16:01:11,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-14 16:01:11,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-14 16:01:11,305 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:01:11,305 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:01:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:01:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 16:01:11,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-07-14 16:01:11,305 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 18 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-14 16:01:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:01:11,305 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-07-14 16:01:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 16:01:11,305 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2022-07-14 16:01:11,305 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:01:11,306 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2022-07-14 16:01:11,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-14 16:01:11,306 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-14 16:01:11,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-14 16:01:11,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-14 16:01:11,306 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:01:11,306 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:01:11,306 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:01:11,306 INFO L287 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-07-14 16:01:11,306 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-14 16:01:11,306 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:01:11,306 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-14 16:01:11,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.07 04:01:11 BoogieIcfgContainer [2022-07-14 16:01:11,310 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-14 16:01:11,311 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 16:01:11,311 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 16:01:11,311 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 16:01:11,311 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:01:00" (3/4) ... [2022-07-14 16:01:11,313 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-14 16:01:11,313 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 16:01:11,314 INFO L158 Benchmark]: Toolchain (without parser) took 11250.42ms. Allocated memory was 127.9MB in the beginning and 213.9MB in the end (delta: 86.0MB). Free memory was 100.2MB in the beginning and 94.9MB in the end (delta: 5.2MB). Peak memory consumption was 90.9MB. Max. memory is 16.1GB. [2022-07-14 16:01:11,314 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory is still 57.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:01:11,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.57ms. Allocated memory is still 127.9MB. Free memory was 100.2MB in the beginning and 101.0MB in the end (delta: -877.1kB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2022-07-14 16:01:11,314 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.49ms. Allocated memory is still 127.9MB. Free memory was 101.0MB in the beginning and 99.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 16:01:11,314 INFO L158 Benchmark]: Boogie Preprocessor took 14.02ms. Allocated memory is still 127.9MB. Free memory was 99.8MB in the beginning and 99.0MB in the end (delta: 783.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:01:11,315 INFO L158 Benchmark]: RCFGBuilder took 169.08ms. Allocated memory is still 127.9MB. Free memory was 99.0MB in the beginning and 90.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 16:01:11,315 INFO L158 Benchmark]: BuchiAutomizer took 10840.19ms. Allocated memory was 127.9MB in the beginning and 213.9MB in the end (delta: 86.0MB). Free memory was 90.2MB in the beginning and 94.9MB in the end (delta: -4.7MB). Peak memory consumption was 82.2MB. Max. memory is 16.1GB. [2022-07-14 16:01:11,315 INFO L158 Benchmark]: Witness Printer took 2.58ms. Allocated memory is still 213.9MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:01:11,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory is still 57.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.57ms. Allocated memory is still 127.9MB. Free memory was 100.2MB in the beginning and 101.0MB in the end (delta: -877.1kB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.49ms. Allocated memory is still 127.9MB. Free memory was 101.0MB in the beginning and 99.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.02ms. Allocated memory is still 127.9MB. Free memory was 99.8MB in the beginning and 99.0MB in the end (delta: 783.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 169.08ms. Allocated memory is still 127.9MB. Free memory was 99.0MB in the beginning and 90.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 10840.19ms. Allocated memory was 127.9MB in the beginning and 213.9MB in the end (delta: 86.0MB). Free memory was 90.2MB in the beginning and 94.9MB in the end (delta: -4.7MB). Peak memory consumption was 82.2MB. Max. memory is 16.1GB. * Witness Printer took 2.58ms. Allocated memory is still 213.9MB. Free memory is still 94.9MB. There was no memory consumed. 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 (6 trivial, 2 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 nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 18 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.8s and 8 iterations. TraceHistogramMax:7. Analysis of lassos took 7.6s. Construction of modules took 0.3s. Büchi inclusion checks took 2.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 8. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 68 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 374 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 358 mSDsluCounter, 366 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 212 mSDsCounter, 203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 724 IncrementalHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 203 mSolverCounterUnsat, 154 mSDtfsCounter, 724 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT1 conc0 concLT1 SILN0 SILU0 SILI1 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq182 hnf93 smp74 dnf100 smp100 tf109 neg96 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-14 16:01:11,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:11,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-14 16:01:11,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:11,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:12,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 16:01:12,355 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