./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-1.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 acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 22:36:26,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 22:36:26,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 22:36:26,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 22:36:26,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 22:36:26,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 22:36:26,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 22:36:26,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 22:36:26,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 22:36:26,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 22:36:26,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 22:36:26,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 22:36:26,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 22:36:26,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 22:36:26,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 22:36:26,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 22:36:26,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 22:36:26,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 22:36:26,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 22:36:26,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 22:36:26,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 22:36:26,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 22:36:26,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 22:36:26,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 22:36:26,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 22:36:26,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 22:36:26,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 22:36:26,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 22:36:26,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 22:36:26,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 22:36:26,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 22:36:26,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 22:36:26,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 22:36:26,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 22:36:26,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 22:36:26,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 22:36:26,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 22:36:26,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 22:36:26,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 22:36:26,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 22:36:26,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 22:36:26,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-21 22:36:26,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 22:36:26,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 22:36:26,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 22:36:26,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 22:36:26,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 22:36:26,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 22:36:26,981 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 22:36:26,982 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-21 22:36:26,982 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-21 22:36:26,982 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-21 22:36:26,982 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-21 22:36:26,992 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-21 22:36:26,992 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-21 22:36:26,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 22:36:26,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 22:36:26,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 22:36:26,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 22:36:26,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 22:36:26,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 22:36:26,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-21 22:36:26,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-21 22:36:26,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-21 22:36:26,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 22:36:26,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 22:36:26,997 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-21 22:36:26,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 22:36:26,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-21 22:36:26,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 22:36:26,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 22:36:26,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 22:36:26,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 22:36:26,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 22:36:26,999 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-21 22:36:26,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 [2021-12-21 22:36:27,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 22:36:27,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 22:36:27,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 22:36:27,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 22:36:27,171 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 22:36:27,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2021-12-21 22:36:27,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b94a662/a4f9950f82084f76836d4044ca897a0a/FLAG30022cc70 [2021-12-21 22:36:27,552 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 22:36:27,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2021-12-21 22:36:27,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b94a662/a4f9950f82084f76836d4044ca897a0a/FLAG30022cc70 [2021-12-21 22:36:27,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b94a662/a4f9950f82084f76836d4044ca897a0a [2021-12-21 22:36:27,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 22:36:27,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 22:36:27,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 22:36:27,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 22:36:27,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 22:36:27,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab952dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27, skipping insertion in model container [2021-12-21 22:36:27,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 22:36:27,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 22:36:27,687 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_10-1.c[743,756] [2021-12-21 22:36:27,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 22:36:27,692 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 22:36:27,700 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_10-1.c[743,756] [2021-12-21 22:36:27,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 22:36:27,708 INFO L208 MainTranslator]: Completed translation [2021-12-21 22:36:27,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27 WrapperNode [2021-12-21 22:36:27,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 22:36:27,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 22:36:27,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 22:36:27,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 22:36:27,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,728 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-21 22:36:27,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 22:36:27,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 22:36:27,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 22:36:27,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 22:36:27,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 22:36:27,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 22:36:27,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 22:36:27,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 22:36:27,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (1/1) ... [2021-12-21 22:36:27,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:27,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:27,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:27,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-21 22:36:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 22:36:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 22:36:27,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 22:36:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 22:36:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-12-21 22:36:27,802 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-12-21 22:36:27,838 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 22:36:27,840 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 22:36:27,892 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 22:36:27,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 22:36:27,911 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 22:36:27,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:36:27 BoogieIcfgContainer [2021-12-21 22:36:27,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 22:36:27,913 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-21 22:36:27,913 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-21 22:36:27,915 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-21 22:36:27,916 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:36:27,916 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.12 10:36:27" (1/3) ... [2021-12-21 22:36:27,916 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3c40e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 10:36:27, skipping insertion in model container [2021-12-21 22:36:27,917 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:36:27,917 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:36:27" (2/3) ... [2021-12-21 22:36:27,917 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3c40e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 10:36:27, skipping insertion in model container [2021-12-21 22:36:27,917 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:36:27,917 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:36:27" (3/3) ... [2021-12-21 22:36:27,918 INFO L388 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2021-12-21 22:36:27,959 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-21 22:36:27,960 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-21 22:36:27,960 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-21 22:36:27,960 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-21 22:36:27,960 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-21 22:36:27,960 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-21 22:36:27,960 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-21 22:36:27,960 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-21 22:36:27,970 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) [2021-12-21 22:36:27,987 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:27,987 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:27,987 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:27,992 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-21 22:36:27,992 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:27,992 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-21 22:36:27,992 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) [2021-12-21 22:36:27,995 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:27,995 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:27,996 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:27,996 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-21 22:36:27,996 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:28,001 INFO L791 eck$LassoCheckResult]: Stem: 4#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(12, 2);call #Ultimate.allocInit(12, 3); 13#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 := 10; 6#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 7#fiboENTRYtrue [2021-12-21 22:36:28,001 INFO L793 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 10#L10true assume !(1 == ~n); 15#L13true call #t~ret4 := fibo(~n - 1);< 7#fiboENTRYtrue [2021-12-21 22:36:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-12-21 22:36:28,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:28,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075847454] [2021-12-21 22:36:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:28,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:28,093 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:28,129 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-12-21 22:36:28,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273785909] [2021-12-21 22:36:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:28,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:28,136 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:28,141 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-12-21 22:36:28,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:28,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353448467] [2021-12-21 22:36:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:28,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:28,167 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:28,175 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:28,291 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:28,292 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:28,292 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:28,292 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:28,292 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:28,293 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,293 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:28,293 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:28,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2021-12-21 22:36:28,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:28,293 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:28,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,396 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:28,397 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:28,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-21 22:36:28,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:28,407 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:28,427 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:28,427 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:28,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-21 22:36:28,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:28,447 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:28,469 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:28,469 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:28,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-21 22:36:28,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:28,497 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:28,504 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:28,504 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:28,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-21 22:36:28,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:28,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:28,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,573 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-21 22:36:28,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:28,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:28,605 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:28,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,609 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:28,609 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:28,609 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:28,609 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:28,609 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:28,609 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,609 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:28,609 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:28,609 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2021-12-21 22:36:28,609 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:28,609 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:28,610 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:28,665 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:28,668 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:28,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-21 22:36:28,672 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:28,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:28,680 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:28,680 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:28,680 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:28,680 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:28,682 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:28,682 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:28,697 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:28,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,714 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,721 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:28,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-21 22:36:28,728 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:28,728 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:28,728 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:28,728 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:28,728 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:28,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:28,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:28,739 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:28,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-21 22:36:28,759 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:28,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:28,765 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:28,765 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:28,765 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:28,765 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:28,766 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:28,766 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:28,777 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:28,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-21 22:36:28,796 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:28,803 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:28,803 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:28,803 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:28,803 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:28,803 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:28,804 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:28,804 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:28,819 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:28,821 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:28,821 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:28,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:28,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:28,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:28,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-21 22:36:28,825 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:28,825 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:28,825 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:28,825 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-12-21 22:36:28,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:28,842 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 22:36:28,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:28,962 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-21 22:36:28,963 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) [2021-12-21 22:36:29,021 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. [2021-12-21 22:36:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 22:36:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-12-21 22:36:29,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-21 22:36:29,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:29,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-21 22:36:29,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:29,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-21 22:36:29,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:29,041 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-12-21 22:36:29,044 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:29,047 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-12-21 22:36:29,052 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-21 22:36:29,052 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-21 22:36:29,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-12-21 22:36:29,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:29,053 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-21 22:36:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-12-21 22:36:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-12-21 22:36:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 22:36:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-21 22:36:29,071 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-21 22:36:29,071 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-21 22:36:29,071 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-21 22:36:29,071 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-12-21 22:36:29,072 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:29,072 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:29,072 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:29,073 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:29,073 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:29,073 INFO L791 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(12, 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 := 10; 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 [2021-12-21 22:36:29,073 INFO L793 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 [2021-12-21 22:36:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-12-21 22:36:29,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:29,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720477073] [2021-12-21 22:36:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:29,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 22:36:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 22:36:29,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720477073] [2021-12-21 22:36:29,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720477073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:36:29,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:36:29,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 22:36:29,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299969181] [2021-12-21 22:36:29,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:36:29,161 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-12-21 22:36:29,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:29,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016514071] [2021-12-21 22:36:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:29,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:29,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 22:36:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 22:36:29,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016514071] [2021-12-21 22:36:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016514071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:36:29,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:36:29,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 22:36:29,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002847708] [2021-12-21 22:36:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:36:29,234 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 22:36:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 22:36:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 22:36:29,237 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:29,280 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-21 22:36:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 22:36:29,281 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-12-21 22:36:29,282 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:29,283 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-12-21 22:36:29,283 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-12-21 22:36:29,283 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-12-21 22:36:29,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-12-21 22:36:29,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:29,283 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-21 22:36:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-12-21 22:36:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-21 22:36:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 22:36:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-21 22:36:29,286 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-21 22:36:29,286 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-21 22:36:29,286 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-21 22:36:29,286 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-12-21 22:36:29,287 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-21 22:36:29,287 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:29,287 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:29,287 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:29,288 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:29,288 INFO L791 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(12, 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 := 10; 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 [2021-12-21 22:36:29,288 INFO L793 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 [2021-12-21 22:36:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-12-21 22:36:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634352833] [2021-12-21 22:36:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:29,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 22:36:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:29,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634352833] [2021-12-21 22:36:29,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634352833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223093313] [2021-12-21 22:36:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:29,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:29,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:29,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:29,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 22:36:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 22:36:29,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:29,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:29,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223093313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:29,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:29,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-21 22:36:29,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640580224] [2021-12-21 22:36:29,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:29,488 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-12-21 22:36:29,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225801351] [2021-12-21 22:36:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:29,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:29,491 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:29,497 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:29,580 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:29,580 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:29,580 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:29,581 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:29,581 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:29,581 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:29,581 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:29,581 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:29,583 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2021-12-21 22:36:29,583 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:29,584 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:29,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:29,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:29,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:29,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:29,622 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:29,622 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:29,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:29,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:29,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-21 22:36:29,631 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:29,631 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:29,639 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:29,639 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:29,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:29,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:29,656 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:29,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-21 22:36:29,691 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:29,691 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:29,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-12-21 22:36:29,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:29,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:29,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:29,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-21 22:36:29,730 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:29,730 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:30,522 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:30,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:30,526 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:30,526 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:30,526 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:30,526 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:30,526 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:30,526 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:30,526 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:30,526 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:30,526 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2021-12-21 22:36:30,526 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:30,526 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:30,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:30,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:30,534 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:30,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:30,578 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:30,578 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:30,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:30,587 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:30,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-21 22:36:30,589 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:30,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:30,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:30,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:30,596 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:30,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:30,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:30,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:30,597 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:30,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:30,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:30,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:30,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:30,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-21 22:36:30,618 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:30,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:30,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:30,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:30,624 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:30,624 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:30,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:30,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:30,626 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:30,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:30,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:30,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:30,642 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:30,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-21 22:36:30,644 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:30,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:30,650 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:30,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:30,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:30,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:30,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:30,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:30,663 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:30,669 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:30,670 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:30,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:30,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:30,671 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-21 22:36:30,673 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:30,673 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:30,673 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:30,673 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-21 22:36:30,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:30,692 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:30,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 22:36:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:30,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 22:36:30,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:30,887 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-21 22:36:30,887 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 22:36:31,018 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-12-21 22:36:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 22:36:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-21 22:36:31,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-12-21 22:36:31,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:31,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-12-21 22:36:31,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:31,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-12-21 22:36:31,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:31,021 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-12-21 22:36:31,026 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-21 22:36:31,029 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-12-21 22:36:31,029 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-12-21 22:36:31,029 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-12-21 22:36:31,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-12-21 22:36:31,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:31,030 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-12-21 22:36:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-12-21 22:36:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-21 22:36:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-12-21 22:36:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-12-21 22:36:31,039 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-12-21 22:36:31,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 22:36:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 22:36:31,040 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 22:36:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:31,120 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2021-12-21 22:36:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 22:36:31,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2021-12-21 22:36:31,126 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-21 22:36:31,129 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2021-12-21 22:36:31,129 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-12-21 22:36:31,130 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-12-21 22:36:31,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2021-12-21 22:36:31,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:31,130 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2021-12-21 22:36:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2021-12-21 22:36:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-12-21 22:36:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-21 22:36:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-21 22:36:31,139 INFO L704 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-21 22:36:31,139 INFO L587 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-21 22:36:31,140 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-21 22:36:31,140 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2021-12-21 22:36:31,141 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-21 22:36:31,141 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:31,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:31,142 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:31,142 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-12-21 22:36:31,142 INFO L791 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2021-12-21 22:36:31,142 INFO L793 eck$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 [2021-12-21 22:36:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2021-12-21 22:36:31,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217204929] [2021-12-21 22:36:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:31,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 22:36:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 22:36:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 22:36:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 22:36:31,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217204929] [2021-12-21 22:36:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217204929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190370439] [2021-12-21 22:36:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:31,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:31,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:31,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 22:36:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 22:36:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 22:36:31,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 22:36:31,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190370439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:31,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:31,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2021-12-21 22:36:31,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141842185] [2021-12-21 22:36:31,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:31,542 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-12-21 22:36:31,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762885720] [2021-12-21 22:36:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:31,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 22:36:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 22:36:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 22:36:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 22:36:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 22:36:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 22:36:31,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762885720] [2021-12-21 22:36:31,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762885720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632177228] [2021-12-21 22:36:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:31,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:31,617 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) [2021-12-21 22:36:31,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 22:36:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:31,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 22:36:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 22:36:31,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 22:36:31,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632177228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:31,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:31,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 22:36:31,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932746429] [2021-12-21 22:36:31,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:31,826 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 22:36:31,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 22:36:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-12-21 22:36:31,827 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 22:36:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:32,115 INFO L93 Difference]: Finished difference Result 174 states and 225 transitions. [2021-12-21 22:36:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 22:36:32,116 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 174 states and 225 transitions. [2021-12-21 22:36:32,119 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-12-21 22:36:32,121 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 174 states to 163 states and 214 transitions. [2021-12-21 22:36:32,121 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2021-12-21 22:36:32,121 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2021-12-21 22:36:32,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 214 transitions. [2021-12-21 22:36:32,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:32,122 INFO L681 BuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2021-12-21 22:36:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 214 transitions. [2021-12-21 22:36:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-21 22:36:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 108 states have internal predecessors, (117), 39 states have call successors, (40), 21 states have call predecessors, (40), 22 states have return successors, (57), 33 states have call predecessors, (57), 36 states have call successors, (57) [2021-12-21 22:36:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2021-12-21 22:36:32,138 INFO L704 BuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2021-12-21 22:36:32,138 INFO L587 BuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2021-12-21 22:36:32,138 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-21 22:36:32,138 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 214 transitions. [2021-12-21 22:36:32,140 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-12-21 22:36:32,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:32,140 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:32,141 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:32,141 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-21 22:36:32,142 INFO L791 eck$LassoCheckResult]: Stem: 1602#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(12, 2);call #Ultimate.allocInit(12, 3); 1603#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 := 10; 1611#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1618#fiboENTRY ~n := #in~n; 1630#L8 assume !(~n < 1); 1631#L10 assume !(1 == ~n); 1610#L13 call #t~ret4 := fibo(~n - 1);< 1612#fiboENTRY ~n := #in~n; 1625#L8 assume !(~n < 1); 1683#L10 assume !(1 == ~n); 1679#L13 call #t~ret4 := fibo(~n - 1);< 1682#fiboENTRY ~n := #in~n; 1681#L8 assume !(~n < 1); 1680#L10 assume !(1 == ~n); 1675#L13 call #t~ret4 := fibo(~n - 1);< 1678#fiboENTRY ~n := #in~n; 1677#L8 assume !(~n < 1); 1676#L10 assume !(1 == ~n); 1671#L13 call #t~ret4 := fibo(~n - 1);< 1674#fiboENTRY ~n := #in~n; 1673#L8 assume !(~n < 1); 1672#L10 assume !(1 == ~n); 1667#L13 call #t~ret4 := fibo(~n - 1);< 1670#fiboENTRY ~n := #in~n; 1669#L8 assume !(~n < 1); 1668#L10 assume !(1 == ~n); 1654#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1666#L8 assume !(~n < 1); 1665#L10 assume !(1 == ~n); 1653#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1666#L8 assume !(~n < 1); 1665#L10 assume !(1 == ~n); 1653#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1664#L8 assume !(~n < 1); 1663#L10 assume 1 == ~n;#res := 1; 1661#fiboFINAL assume true; 1659#fiboEXIT >#33#return; 1635#L13-1 call #t~ret5 := fibo(~n - 2);< 1655#fiboENTRY ~n := #in~n; 1739#L8 assume ~n < 1;#res := 0; 1737#fiboFINAL assume true; 1736#fiboEXIT >#35#return; 1735#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1734#fiboFINAL assume true; 1716#fiboEXIT >#33#return; 1709#L13-1 [2021-12-21 22:36:32,142 INFO L793 eck$LassoCheckResult]: Loop: 1709#L13-1 call #t~ret5 := fibo(~n - 2);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume !(1 == ~n); 1706#L13 call #t~ret4 := fibo(~n - 1);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume !(1 == ~n); 1706#L13 call #t~ret4 := fibo(~n - 1);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume 1 == ~n;#res := 1; 1743#fiboFINAL assume true; 1705#fiboEXIT >#33#return; 1713#L13-1 call #t~ret5 := fibo(~n - 2);< 1730#fiboENTRY ~n := #in~n; 1747#L8 assume ~n < 1;#res := 0; 1745#fiboFINAL assume true; 1750#fiboEXIT >#35#return; 1715#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1738#fiboFINAL assume true; 1717#fiboEXIT >#33#return; 1709#L13-1 [2021-12-21 22:36:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1960159334, now seen corresponding path program 2 times [2021-12-21 22:36:32,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:32,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104377924] [2021-12-21 22:36:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:32,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:32,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 22:36:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:32,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 22:36:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:32,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 22:36:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 22:36:32,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104377924] [2021-12-21 22:36:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104377924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397471921] [2021-12-21 22:36:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 22:36:32,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:32,314 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) [2021-12-21 22:36:32,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 22:36:32,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 22:36:32,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 22:36:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 22:36:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 22:36:32,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 22:36:32,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397471921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:32,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:32,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 23 [2021-12-21 22:36:32,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349091599] [2021-12-21 22:36:32,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:32,608 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2021-12-21 22:36:32,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:32,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935609092] [2021-12-21 22:36:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:32,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:32,612 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:32,616 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:32,806 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:32,807 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:32,807 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:32,807 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:32,807 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:32,807 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:32,807 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:32,807 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:32,807 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2021-12-21 22:36:32,807 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:32,807 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:32,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:32,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:32,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:32,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:32,850 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:32,850 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:32,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:32,852 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:32,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-21 22:36:32,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:32,857 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:32,871 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:32,872 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:32,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:32,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:32,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:32,891 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:32,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-21 22:36:32,893 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:32,893 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:32,921 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 [2021-12-21 22:36:32,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:32,923 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:32,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-21 22:36:32,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:32,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:33,868 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:33,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:33,872 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:33,872 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:33,872 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:33,872 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:33,872 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:33,872 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:33,872 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:33,872 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:33,872 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2021-12-21 22:36:33,872 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:33,872 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:33,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:33,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:33,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:33,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:33,927 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:33,927 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:33,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:33,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:33,928 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:33,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-21 22:36:33,930 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:33,936 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:33,936 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:33,936 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:33,936 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:33,936 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:33,936 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:33,936 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:33,951 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:33,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:33,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:33,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:33,967 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:33,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-21 22:36:33,969 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:33,975 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:33,975 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:33,975 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:33,975 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:33,975 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:33,976 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:33,976 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:33,991 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:33,993 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:33,993 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:33,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:33,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:33,994 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:33,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-21 22:36:33,999 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:33,999 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:33,999 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:33,999 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-21 22:36:34,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:34,017 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 22:36:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 22:36:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:34,463 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-12-21 22:36:34,463 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 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) [2021-12-21 22:36:34,626 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. 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 296 states and 402 transitions. Complement of second has 45 states. [2021-12-21 22:36:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:34,631 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) [2021-12-21 22:36:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-12-21 22:36:34,631 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 48 letters. Loop has 22 letters. [2021-12-21 22:36:34,631 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:34,631 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:34,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 22:36:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 22:36:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:35,001 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-12-21 22:36:35,002 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 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) [2021-12-21 22:36:35,102 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. 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 357 states and 475 transitions. Complement of second has 25 states. [2021-12-21 22:36:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:35,103 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) [2021-12-21 22:36:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-12-21 22:36:35,104 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 48 letters. Loop has 22 letters. [2021-12-21 22:36:35,104 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:35,104 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:35,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 22:36:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:35,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 22:36:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:35,496 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-12-21 22:36:35,497 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 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) [2021-12-21 22:36:35,676 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. 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 1282 states and 1787 transitions. Complement of second has 138 states. [2021-12-21 22:36:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:35,677 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) [2021-12-21 22:36:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-12-21 22:36:35,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 22 letters. [2021-12-21 22:36:35,678 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:35,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 70 letters. Loop has 22 letters. [2021-12-21 22:36:35,679 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:35,679 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 44 letters. [2021-12-21 22:36:35,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:35,680 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1282 states and 1787 transitions. [2021-12-21 22:36:35,693 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-12-21 22:36:35,703 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1282 states to 770 states and 1148 transitions. [2021-12-21 22:36:35,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 300 [2021-12-21 22:36:35,704 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 338 [2021-12-21 22:36:35,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1148 transitions. [2021-12-21 22:36:35,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:35,705 INFO L681 BuchiCegarLoop]: Abstraction has 770 states and 1148 transitions. [2021-12-21 22:36:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1148 transitions. [2021-12-21 22:36:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 615. [2021-12-21 22:36:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 375 states have (on average 1.1653333333333333) internal successors, (437), 399 states have internal predecessors, (437), 146 states have call successors, (160), 74 states have call predecessors, (160), 94 states have return successors, (270), 141 states have call predecessors, (270), 136 states have call successors, (270) [2021-12-21 22:36:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 867 transitions. [2021-12-21 22:36:35,764 INFO L704 BuchiCegarLoop]: Abstraction has 615 states and 867 transitions. [2021-12-21 22:36:35,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 22:36:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-12-21 22:36:35,766 INFO L87 Difference]: Start difference. First operand 615 states and 867 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 15 states have internal predecessors, (43), 13 states have call successors, (13), 8 states have call predecessors, (13), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 22:36:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:36,049 INFO L93 Difference]: Finished difference Result 747 states and 1037 transitions. [2021-12-21 22:36:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 22:36:36,050 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 747 states and 1037 transitions. [2021-12-21 22:36:36,059 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:36,066 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 747 states to 739 states and 1022 transitions. [2021-12-21 22:36:36,067 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 309 [2021-12-21 22:36:36,067 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 312 [2021-12-21 22:36:36,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 739 states and 1022 transitions. [2021-12-21 22:36:36,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:36,068 INFO L681 BuchiCegarLoop]: Abstraction has 739 states and 1022 transitions. [2021-12-21 22:36:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states and 1022 transitions. [2021-12-21 22:36:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 713. [2021-12-21 22:36:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 436 states have (on average 1.1490825688073394) internal successors, (501), 461 states have internal predecessors, (501), 172 states have call successors, (186), 87 states have call predecessors, (186), 105 states have return successors, (307), 164 states have call predecessors, (307), 160 states have call successors, (307) [2021-12-21 22:36:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 994 transitions. [2021-12-21 22:36:36,087 INFO L704 BuchiCegarLoop]: Abstraction has 713 states and 994 transitions. [2021-12-21 22:36:36,087 INFO L587 BuchiCegarLoop]: Abstraction has 713 states and 994 transitions. [2021-12-21 22:36:36,087 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-21 22:36:36,087 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 713 states and 994 transitions. [2021-12-21 22:36:36,091 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:36,091 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:36,091 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:36,092 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:36,092 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:36,092 INFO L791 eck$LassoCheckResult]: Stem: 6320#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(12, 2);call #Ultimate.allocInit(12, 3); 6321#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 := 10; 6337#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 6338#fiboENTRY ~n := #in~n; 6392#L8 assume !(~n < 1); 6391#L10 assume !(1 == ~n); 6387#L13 call #t~ret4 := fibo(~n - 1);< 6390#fiboENTRY ~n := #in~n; 6389#L8 assume !(~n < 1); 6388#L10 assume !(1 == ~n); 6383#L13 call #t~ret4 := fibo(~n - 1);< 6386#fiboENTRY ~n := #in~n; 6385#L8 assume !(~n < 1); 6384#L10 assume !(1 == ~n); 6379#L13 call #t~ret4 := fibo(~n - 1);< 6382#fiboENTRY ~n := #in~n; 6381#L8 assume !(~n < 1); 6380#L10 assume !(1 == ~n); 6375#L13 call #t~ret4 := fibo(~n - 1);< 6378#fiboENTRY ~n := #in~n; 6377#L8 assume !(~n < 1); 6376#L10 assume !(1 == ~n); 6371#L13 call #t~ret4 := fibo(~n - 1);< 6374#fiboENTRY ~n := #in~n; 6373#L8 assume !(~n < 1); 6372#L10 assume !(1 == ~n); 6359#L13 call #t~ret4 := fibo(~n - 1);< 6370#fiboENTRY ~n := #in~n; 6369#L8 assume !(~n < 1); 6368#L10 assume !(1 == ~n); 6364#L13 call #t~ret4 := fibo(~n - 1);< 6363#fiboENTRY ~n := #in~n; 6367#L8 assume !(~n < 1); 6648#L10 assume !(1 == ~n); 6365#L13 call #t~ret4 := fibo(~n - 1);< 6363#fiboENTRY ~n := #in~n; 6366#L8 assume !(~n < 1); 6875#L10 assume 1 == ~n;#res := 1; 6874#fiboFINAL assume true; 6730#fiboEXIT >#33#return; 6671#L13-1 call #t~ret5 := fibo(~n - 2);< 6676#fiboENTRY ~n := #in~n; 6942#L8 assume !(~n < 1); 6884#L10 assume !(1 == ~n); 6886#L13 call #t~ret4 := fibo(~n - 1);< 6920#fiboENTRY ~n := #in~n; 6947#L8 assume !(~n < 1); 6922#L10 assume !(1 == ~n); 6923#L13 call #t~ret4 := fibo(~n - 1);< 6938#fiboENTRY [2021-12-21 22:36:36,092 INFO L793 eck$LassoCheckResult]: Loop: 6938#fiboENTRY ~n := #in~n; 6944#L8 assume !(~n < 1); 6943#L10 assume !(1 == ~n); 6937#L13 call #t~ret4 := fibo(~n - 1);< 6938#fiboENTRY [2021-12-21 22:36:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 134483699, now seen corresponding path program 1 times [2021-12-21 22:36:36,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:36,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79854263] [2021-12-21 22:36:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:36,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:36,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 22:36:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:36,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79854263] [2021-12-21 22:36:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79854263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165202482] [2021-12-21 22:36:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:36,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:36,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-21 22:36:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 22:36:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:36,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 22:36:36,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165202482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:36,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:36,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2021-12-21 22:36:36,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805534081] [2021-12-21 22:36:36,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:36,483 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2021-12-21 22:36:36,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:36,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705814186] [2021-12-21 22:36:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:36,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:36,486 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:36,487 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:36,523 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:36,523 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:36,523 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:36,523 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:36,523 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:36,523 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,523 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:36,523 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:36,523 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2021-12-21 22:36:36,523 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:36,523 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:36,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,559 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:36,559 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:36,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,560 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-12-21 22:36:36,563 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:36,563 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:36,583 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:36,584 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:36,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-12-21 22:36:36,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,600 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-12-21 22:36:36,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:36,602 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:36,608 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:36,609 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:36,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-12-21 22:36:36,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,625 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,632 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:36,632 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:36,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-12-21 22:36:36,655 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:36,655 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:36,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-12-21 22:36:36,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,674 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-12-21 22:36:36,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:36,676 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:36,683 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:36,683 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:36,697 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 [2021-12-21 22:36:36,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,698 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-12-21 22:36:36,700 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:36,700 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:36,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-12-21 22:36:36,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,722 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-12-21 22:36:36,724 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:36,724 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:36,748 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:36,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:36,750 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:36,751 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:36,751 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:36,751 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:36,751 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:36,751 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,751 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:36,751 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:36,751 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2021-12-21 22:36:36,751 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:36,751 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:36,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:36,789 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:36,789 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:36,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,793 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-12-21 22:36:36,795 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:36,801 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:36,801 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:36,801 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:36,801 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:36,801 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:36,801 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:36,802 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:36,802 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:36,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-12-21 22:36:36,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,818 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-12-21 22:36:36,820 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:36,825 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:36,825 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:36,825 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:36,825 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:36,825 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:36,826 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:36,826 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:36,826 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:36,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:36,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,842 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-12-21 22:36:36,844 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:36,849 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:36,849 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:36,849 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:36,849 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:36,849 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:36,850 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:36,850 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:36,851 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:36,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:36,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,869 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-12-21 22:36:36,870 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:36,876 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:36,876 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:36,876 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:36,876 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:36,876 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:36,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:36,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:36,881 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:36,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-12-21 22:36:36,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,897 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-12-21 22:36:36,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:36,905 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:36,905 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:36,906 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:36,906 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:36,906 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:36,906 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:36,906 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:36,918 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:36,920 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-21 22:36:36,920 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-21 22:36:36,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:36,922 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:36,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-12-21 22:36:36,923 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:36,923 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:36,923 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:36,923 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-12-21 22:36:36,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:36,953 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 22:36:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:37,138 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-21 22:36:37,138 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,183 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 738 states and 1019 transitions. Complement of second has 13 states. [2021-12-21 22:36:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-12-21 22:36:37,184 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-12-21 22:36:37,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:37,184 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 22:36:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:37,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:37,385 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-21 22:36:37,385 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,425 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 738 states and 1019 transitions. Complement of second has 13 states. [2021-12-21 22:36:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-12-21 22:36:37,426 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-12-21 22:36:37,427 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:37,427 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:37,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 22:36:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:37,602 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-12-21 22:36:37,602 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,655 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 959 states and 1259 transitions. Complement of second has 14 states. [2021-12-21 22:36:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-12-21 22:36:37,656 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2021-12-21 22:36:37,656 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:37,656 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2021-12-21 22:36:37,656 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:37,656 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2021-12-21 22:36:37,657 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:37,657 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1259 transitions. [2021-12-21 22:36:37,664 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:37,670 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 770 states and 1058 transitions. [2021-12-21 22:36:37,670 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 254 [2021-12-21 22:36:37,670 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2021-12-21 22:36:37,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1058 transitions. [2021-12-21 22:36:37,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:37,670 INFO L681 BuchiCegarLoop]: Abstraction has 770 states and 1058 transitions. [2021-12-21 22:36:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1058 transitions. [2021-12-21 22:36:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 737. [2021-12-21 22:36:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 459 states have (on average 1.1416122004357299) internal successors, (524), 484 states have internal predecessors, (524), 173 states have call successors, (187), 88 states have call predecessors, (187), 105 states have return successors, (307), 164 states have call predecessors, (307), 160 states have call successors, (307) [2021-12-21 22:36:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1018 transitions. [2021-12-21 22:36:37,684 INFO L704 BuchiCegarLoop]: Abstraction has 737 states and 1018 transitions. [2021-12-21 22:36:37,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 22:36:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-12-21 22:36:37,685 INFO L87 Difference]: Start difference. First operand 737 states and 1018 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (11), 10 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:37,945 INFO L93 Difference]: Finished difference Result 879 states and 1234 transitions. [2021-12-21 22:36:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 22:36:37,945 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 879 states and 1234 transitions. [2021-12-21 22:36:37,953 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:37,960 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 879 states to 857 states and 1204 transitions. [2021-12-21 22:36:37,960 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 298 [2021-12-21 22:36:37,961 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 301 [2021-12-21 22:36:37,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 857 states and 1204 transitions. [2021-12-21 22:36:37,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:37,961 INFO L681 BuchiCegarLoop]: Abstraction has 857 states and 1204 transitions. [2021-12-21 22:36:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states and 1204 transitions. [2021-12-21 22:36:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 789. [2021-12-21 22:36:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 492 states have (on average 1.136178861788618) internal successors, (559), 517 states have internal predecessors, (559), 192 states have call successors, (208), 99 states have call predecessors, (208), 105 states have return successors, (306), 172 states have call predecessors, (306), 179 states have call successors, (306) [2021-12-21 22:36:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1073 transitions. [2021-12-21 22:36:37,977 INFO L704 BuchiCegarLoop]: Abstraction has 789 states and 1073 transitions. [2021-12-21 22:36:37,977 INFO L587 BuchiCegarLoop]: Abstraction has 789 states and 1073 transitions. [2021-12-21 22:36:37,977 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-21 22:36:37,977 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 789 states and 1073 transitions. [2021-12-21 22:36:37,981 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:37,981 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:36:37,981 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:36:37,982 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [13, 13, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:36:37,982 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-21 22:36:37,982 INFO L791 eck$LassoCheckResult]: Stem: 11970#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(12, 2);call #Ultimate.allocInit(12, 3); 11971#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 := 10; 11985#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 11986#fiboENTRY ~n := #in~n; 12101#L8 assume !(~n < 1); 12099#L10 assume !(1 == ~n); 12071#L13 call #t~ret4 := fibo(~n - 1);< 12096#fiboENTRY ~n := #in~n; 12547#L8 assume !(~n < 1); 12468#L10 assume !(1 == ~n); 12074#L13 call #t~ret4 := fibo(~n - 1);< 12075#fiboENTRY ~n := #in~n; 12112#L8 assume !(~n < 1); 12111#L10 assume !(1 == ~n); 12104#L13 call #t~ret4 := fibo(~n - 1);< 12110#fiboENTRY ~n := #in~n; 12409#L8 assume !(~n < 1); 12408#L10 assume !(1 == ~n); 12143#L13 call #t~ret4 := fibo(~n - 1);< 12162#fiboENTRY ~n := #in~n; 12171#L8 assume !(~n < 1); 12165#L10 assume !(1 == ~n); 12132#L13 call #t~ret4 := fibo(~n - 1);< 12144#fiboENTRY ~n := #in~n; 12261#L8 assume !(~n < 1); 12258#L10 assume !(1 == ~n); 12234#L13 call #t~ret4 := fibo(~n - 1);< 12240#fiboENTRY ~n := #in~n; 12239#L8 assume !(~n < 1); 12237#L10 assume !(1 == ~n); 12154#L13 call #t~ret4 := fibo(~n - 1);< 12235#fiboENTRY ~n := #in~n; 12263#L8 assume !(~n < 1); 12262#L10 assume !(1 == ~n); 12251#L13 call #t~ret4 := fibo(~n - 1);< 12260#fiboENTRY ~n := #in~n; 12440#L8 assume !(~n < 1); 12438#L10 assume !(1 == ~n); 12252#L13 call #t~ret4 := fibo(~n - 1);< 12260#fiboENTRY ~n := #in~n; 12441#L8 assume !(~n < 1); 12625#L10 assume 1 == ~n;#res := 1; 12624#fiboFINAL assume true; 12622#fiboEXIT >#33#return; 12618#L13-1 call #t~ret5 := fibo(~n - 2);< 12619#fiboENTRY ~n := #in~n; 12642#L8 assume !(~n < 1); 12643#L10 assume !(1 == ~n); 12648#L13 call #t~ret4 := fibo(~n - 1);< 12657#fiboENTRY ~n := #in~n; 12712#L8 assume !(~n < 1); 12714#L10 assume !(1 == ~n); 12029#L13 call #t~ret4 := fibo(~n - 1);< 12026#fiboENTRY ~n := #in~n; 12030#L8 assume !(~n < 1); 12718#L10 assume !(1 == ~n); 12027#L13 [2021-12-21 22:36:37,982 INFO L793 eck$LassoCheckResult]: Loop: 12027#L13 call #t~ret4 := fibo(~n - 1);< 12026#fiboENTRY ~n := #in~n; 12030#L8 assume !(~n < 1); 12718#L10 assume !(1 == ~n); 12027#L13 [2021-12-21 22:36:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -486527177, now seen corresponding path program 2 times [2021-12-21 22:36:37,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:37,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530565233] [2021-12-21 22:36:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:37,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:38,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 22:36:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 22:36:38,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:36:38,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530565233] [2021-12-21 22:36:38,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530565233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 22:36:38,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360363921] [2021-12-21 22:36:38,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 22:36:38,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 22:36:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:38,151 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 22:36:38,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-21 22:36:38,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 22:36:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 22:36:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 22:36:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 22:36:38,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 22:36:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 22:36:38,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360363921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 22:36:38,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 22:36:38,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2021-12-21 22:36:38,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168767939] [2021-12-21 22:36:38,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 22:36:38,350 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-21 22:36:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2021-12-21 22:36:38,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:36:38,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489428510] [2021-12-21 22:36:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:36:38,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:36:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:38,352 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:36:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:36:38,354 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:36:38,386 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:38,386 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:38,386 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:38,387 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:38,387 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-21 22:36:38,387 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:38,387 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:38,387 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:38,387 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2021-12-21 22:36:38,387 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:38,387 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:38,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:38,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:38,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:38,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:38,431 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:38,431 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-21 22:36:38,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:38,432 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:38,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:38,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:38,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-12-21 22:36:38,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:38,463 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:38,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:38,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:38,483 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:38,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-12-21 22:36:38,485 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:38,485 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:38,507 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:38,507 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:38,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:38,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:38,526 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:38,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-12-21 22:36:38,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:38,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:38,547 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-21 22:36:38,547 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-21 22:36:38,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:38,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:38,567 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:38,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-12-21 22:36:38,570 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-21 22:36:38,570 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:38,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Ended with exit code 0 [2021-12-21 22:36:38,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:38,599 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:38,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-12-21 22:36:38,601 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-21 22:36:38,601 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-21 22:36:40,262 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-21 22:36:40,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2021-12-21 22:36:40,279 INFO L210 LassoAnalysis]: Preferences: [2021-12-21 22:36:40,279 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-21 22:36:40,279 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-21 22:36:40,279 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-21 22:36:40,279 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-21 22:36:40,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:40,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-21 22:36:40,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-21 22:36:40,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2021-12-21 22:36:40,280 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-21 22:36:40,280 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-21 22:36:40,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:40,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:40,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:40,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-21 22:36:40,313 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-21 22:36:40,314 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-21 22:36:40,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:40,315 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:40,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-12-21 22:36:40,317 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:40,322 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:40,323 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:40,323 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:40,323 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:40,323 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:40,323 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:40,323 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:40,324 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:40,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2021-12-21 22:36:40,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:40,340 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:40,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-12-21 22:36:40,342 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:40,347 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:40,348 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:40,348 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:40,348 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:40,348 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:40,348 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:40,348 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:40,367 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:40,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:40,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:40,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:40,384 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:40,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-12-21 22:36:40,386 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-21 22:36:40,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:40,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:40,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:40,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:40,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:40,392 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:40,392 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:40,403 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-21 22:36:40,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2021-12-21 22:36:40,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:40,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:40,419 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-12-21 22:36:40,420 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 [2021-12-21 22:36:40,425 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-21 22:36:40,426 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-21 22:36:40,426 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-21 22:36:40,426 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-21 22:36:40,426 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-21 22:36:40,427 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-21 22:36:40,427 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-21 22:36:40,435 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-21 22:36:40,437 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-21 22:36:40,437 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-21 22:36:40,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:36:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:36:40,438 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-21 22:36:40,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-12-21 22:36:40,443 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-21 22:36:40,443 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-21 22:36:40,443 INFO L513 LassoAnalysis]: Proved termination. [2021-12-21 22:36:40,443 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-21 22:36:40,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:40,458 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-21 22:36:40,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 22:36:40,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:40,686 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-12-21 22:36:40,687 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:40,738 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 816 states and 1101 transitions. Complement of second has 18 states. [2021-12-21 22:36:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-12-21 22:36:40,740 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 56 letters. Loop has 4 letters. [2021-12-21 22:36:40,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:40,740 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-21 22:36:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:36:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 22:36:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:36:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 22:36:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 22:36:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:36:40,942 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-12-21 22:36:40,942 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:41,013 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 1046 states and 1417 transitions. Complement of second has 22 states. [2021-12-21 22:36:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-12-21 22:36:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-12-21 22:36:41,015 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2021-12-21 22:36:41,015 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:41,015 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 60 letters. Loop has 4 letters. [2021-12-21 22:36:41,015 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:41,015 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 8 letters. [2021-12-21 22:36:41,016 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-21 22:36:41,016 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1046 states and 1417 transitions. [2021-12-21 22:36:41,026 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-12-21 22:36:41,034 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1046 states to 967 states and 1333 transitions. [2021-12-21 22:36:41,034 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2021-12-21 22:36:41,035 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 327 [2021-12-21 22:36:41,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 967 states and 1333 transitions. [2021-12-21 22:36:41,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-21 22:36:41,035 INFO L681 BuchiCegarLoop]: Abstraction has 967 states and 1333 transitions. [2021-12-21 22:36:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states and 1333 transitions. [2021-12-21 22:36:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 950. [2021-12-21 22:36:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 600 states have (on average 1.125) internal successors, (675), 631 states have internal predecessors, (675), 225 states have call successors, (259), 126 states have call predecessors, (259), 125 states have return successors, (374), 192 states have call predecessors, (374), 212 states have call successors, (374) [2021-12-21 22:36:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1308 transitions. [2021-12-21 22:36:41,051 INFO L704 BuchiCegarLoop]: Abstraction has 950 states and 1308 transitions. [2021-12-21 22:36:41,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:36:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 22:36:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-12-21 22:36:41,065 INFO L87 Difference]: Start difference. First operand 950 states and 1308 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 13 states have internal predecessors, (38), 11 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 22:36:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:36:41,297 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2021-12-21 22:36:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 22:36:41,298 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 565 states and 661 transitions. [2021-12-21 22:36:41,301 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-21 22:36:41,301 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 565 states to 0 states and 0 transitions. [2021-12-21 22:36:41,301 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-21 22:36:41,301 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-21 22:36:41,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-21 22:36:41,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 22:36:41,301 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 22:36:41,301 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 22:36:41,301 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 22:36:41,301 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-12-21 22:36:41,301 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-21 22:36:41,301 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-21 22:36:41,301 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-21 22:36:41,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.12 10:36:41 BoogieIcfgContainer [2021-12-21 22:36:41,306 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-21 22:36:41,307 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 22:36:41,307 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 22:36:41,307 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 22:36:41,307 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:36:27" (3/4) ... [2021-12-21 22:36:41,309 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 22:36:41,309 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 22:36:41,309 INFO L158 Benchmark]: Toolchain (without parser) took 13718.65ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 62.8MB in the beginning and 96.5MB in the end (delta: -33.7MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-12-21 22:36:41,309 INFO L158 Benchmark]: CDTParser took 2.39ms. Allocated memory is still 83.9MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 22:36:41,309 INFO L158 Benchmark]: CACSL2BoogieTranslator took 116.62ms. Allocated memory is still 83.9MB. Free memory was 62.6MB in the beginning and 53.5MB in the end (delta: 9.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-21 22:36:41,310 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.16ms. Allocated memory is still 83.9MB. Free memory was 53.5MB in the beginning and 52.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:36:41,310 INFO L158 Benchmark]: Boogie Preprocessor took 12.26ms. Allocated memory is still 83.9MB. Free memory was 52.0MB in the beginning and 51.2MB in the end (delta: 794.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 22:36:41,310 INFO L158 Benchmark]: RCFGBuilder took 171.23ms. Allocated memory is still 83.9MB. Free memory was 51.1MB in the beginning and 42.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 22:36:41,310 INFO L158 Benchmark]: BuchiAutomizer took 13393.16ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 42.7MB in the beginning and 97.6MB in the end (delta: -54.8MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-12-21 22:36:41,310 INFO L158 Benchmark]: Witness Printer took 2.22ms. Allocated memory is still 151.0MB. Free memory was 97.6MB in the beginning and 96.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:36:41,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.39ms. Allocated memory is still 83.9MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 116.62ms. Allocated memory is still 83.9MB. Free memory was 62.6MB in the beginning and 53.5MB in the end (delta: 9.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.16ms. Allocated memory is still 83.9MB. Free memory was 53.5MB in the beginning and 52.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.26ms. Allocated memory is still 83.9MB. Free memory was 52.0MB in the beginning and 51.2MB in the end (delta: 794.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 171.23ms. Allocated memory is still 83.9MB. Free memory was 51.1MB in the beginning and 42.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 13393.16ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 42.7MB in the beginning and 97.6MB in the end (delta: -54.8MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * Witness Printer took 2.22ms. Allocated memory is still 151.0MB. Free memory was 97.6MB in the beginning and 96.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (6 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 6 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 13.3s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 8.3s. Construction of modules took 0.8s. Büchi inclusion checks took 3.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 10. Automata minimization 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 330 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 789 states and ocurred in iteration 6. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 703 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 671 mSDsluCounter, 832 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 578 mSDsCounter, 529 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1934 IncrementalHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 529 mSolverCounterUnsat, 254 mSDtfsCounter, 1934 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq178 hnf94 smp75 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 12 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-21 22:36:41,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:41,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-21 22:36:41,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-21 22:36:41,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 22:36:42,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-21 22:36:42,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 22:36:42,551 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