./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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 64bit --witnessprinter.graph.data.programhash 14cfbc3a2ba2bfe3a03d4d1ebff24b0baf1851f06dbbd2468b59e09322e4ce16 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 17:16:26,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 17:16:26,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 17:16:26,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 17:16:26,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 17:16:26,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 17:16:26,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 17:16:26,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 17:16:26,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 17:16:26,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 17:16:26,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 17:16:26,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 17:16:26,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 17:16:26,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 17:16:26,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 17:16:26,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 17:16:26,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 17:16:26,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 17:16:26,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 17:16:26,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 17:16:26,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 17:16:26,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 17:16:26,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 17:16:26,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 17:16:26,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 17:16:26,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 17:16:26,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 17:16:26,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 17:16:26,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 17:16:26,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 17:16:26,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 17:16:26,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 17:16:26,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 17:16:26,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 17:16:26,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 17:16:26,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 17:16:26,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 17:16:26,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 17:16:26,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 17:16:26,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 17:16:26,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 17:16:26,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-19 17:16:26,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 17:16:26,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 17:16:26,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 17:16:26,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 17:16:26,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 17:16:26,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 17:16:26,145 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 17:16:26,145 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-19 17:16:26,145 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-19 17:16:26,146 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-19 17:16:26,146 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-19 17:16:26,146 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-19 17:16:26,146 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-19 17:16:26,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 17:16:26,147 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 17:16:26,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 17:16:26,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 17:16:26,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-19 17:16:26,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-19 17:16:26,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-19 17:16:26,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 17:16:26,148 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-19 17:16:26,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 17:16:26,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-19 17:16:26,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 17:16:26,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 17:16:26,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 17:16:26,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 17:16:26,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 17:16:26,149 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-19 17:16:26,150 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14cfbc3a2ba2bfe3a03d4d1ebff24b0baf1851f06dbbd2468b59e09322e4ce16 [2021-12-19 17:16:26,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 17:16:26,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 17:16:26,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 17:16:26,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 17:16:26,387 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 17:16:26,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2021-12-19 17:16:26,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0513973b/7751efb1dcbf4d05b6815600a6ccc262/FLAGf37048142 [2021-12-19 17:16:26,765 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 17:16:26,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2021-12-19 17:16:26,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0513973b/7751efb1dcbf4d05b6815600a6ccc262/FLAGf37048142 [2021-12-19 17:16:26,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0513973b/7751efb1dcbf4d05b6815600a6ccc262 [2021-12-19 17:16:26,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 17:16:26,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 17:16:26,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 17:16:26,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 17:16:26,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 17:16:26,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363fac65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26, skipping insertion in model container [2021-12-19 17:16:26,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 17:16:26,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 17:16:26,945 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/termination-numeric/Fibonacci01-2.c[761,774] [2021-12-19 17:16:26,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 17:16:26,950 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 17:16:26,961 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/termination-numeric/Fibonacci01-2.c[761,774] [2021-12-19 17:16:26,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 17:16:26,969 INFO L208 MainTranslator]: Completed translation [2021-12-19 17:16:26,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26 WrapperNode [2021-12-19 17:16:26,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 17:16:26,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 17:16:26,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 17:16:26,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 17:16:26,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,988 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-12-19 17:16:26,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 17:16:26,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 17:16:26,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 17:16:26,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 17:16:26,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:26,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 17:16:26,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 17:16:26,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 17:16:26,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 17:16:27,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (1/1) ... [2021-12-19 17:16:27,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:27,021 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) [2021-12-19 17:16:27,023 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 [2021-12-19 17:16:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-12-19 17:16:27,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-12-19 17:16:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 17:16:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 17:16:27,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 17:16:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-19 17:16:27,110 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 17:16:27,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 17:16:27,208 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 17:16:27,213 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 17:16:27,214 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-19 17:16:27,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:16:27 BoogieIcfgContainer [2021-12-19 17:16:27,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 17:16:27,216 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-19 17:16:27,216 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-19 17:16:27,219 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-19 17:16:27,219 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 17:16:27,219 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.12 05:16:26" (1/3) ... [2021-12-19 17:16:27,220 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@149918ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.12 05:16:27, skipping insertion in model container [2021-12-19 17:16:27,220 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 17:16:27,221 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:16:26" (2/3) ... [2021-12-19 17:16:27,221 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@149918ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.12 05:16:27, skipping insertion in model container [2021-12-19 17:16:27,221 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 17:16:27,221 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:16:27" (3/3) ... [2021-12-19 17:16:27,222 INFO L388 chiAutomizerObserver]: Analyzing ICFG Fibonacci01-2.c [2021-12-19 17:16:27,292 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-19 17:16:27,292 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-19 17:16:27,292 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-19 17:16:27,292 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-19 17:16:27,293 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-19 17:16:27,293 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-19 17:16:27,293 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-19 17:16:27,293 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-19 17:16:27,315 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 17:16:27,328 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:27,328 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:16:27,328 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:16:27,332 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-19 17:16:27,347 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-19 17:16:27,347 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-19 17:16:27,347 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 17:16:27,349 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:27,349 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:16:27,349 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:16:27,350 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-19 17:16:27,350 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-19 17:16:27,354 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(16, 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~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 10#L29true assume !(main_~x~0#1 < 1); 12#L31true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 5#fibonacciENTRYtrue [2021-12-19 17:16:27,354 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 16#L22true call #t~ret4 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-12-19 17:16:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1325876, now seen corresponding path program 1 times [2021-12-19 17:16:27,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:27,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197267822] [2021-12-19 17:16:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:27,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:27,456 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:27,485 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 1 times [2021-12-19 17:16:27,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:27,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488935033] [2021-12-19 17:16:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:27,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:27,496 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:27,508 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 408654161, now seen corresponding path program 1 times [2021-12-19 17:16:27,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:27,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161986219] [2021-12-19 17:16:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:27,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:27,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:27,540 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:27,630 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:27,630 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:27,630 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:27,630 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:27,631 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 17:16:27,631 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,631 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:27,631 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:27,632 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration1_Loop [2021-12-19 17:16:27,632 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:27,632 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:27,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,707 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:27,708 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 17:16:27,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:27,711 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) [2021-12-19 17:16:27,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:27,726 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:27,736 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 [2021-12-19 17:16:27,750 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:27,750 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:27,773 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 [2021-12-19 17:16:27,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:27,779 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) [2021-12-19 17:16:27,780 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 [2021-12-19 17:16:27,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:27,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:27,795 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:27,796 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:27,813 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 [2021-12-19 17:16:27,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:27,825 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) [2021-12-19 17:16:27,833 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:27,833 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:27,834 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 [2021-12-19 17:16:27,854 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:27,855 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:27,871 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 [2021-12-19 17:16:27,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:27,873 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) [2021-12-19 17:16:27,874 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 [2021-12-19 17:16:27,875 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:27,875 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:27,897 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 [2021-12-19 17:16:27,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:27,898 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) [2021-12-19 17:16:27,899 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 [2021-12-19 17:16:27,901 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 17:16:27,901 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:27,928 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 17:16:27,932 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 [2021-12-19 17:16:27,932 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:27,932 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:27,933 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:27,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:27,933 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 17:16:27,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:27,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:27,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration1_Loop [2021-12-19 17:16:27,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:27,933 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:27,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:27,995 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:27,998 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 17:16:27,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:27,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:28,006 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) [2021-12-19 17:16:28,006 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 [2021-12-19 17:16:28,008 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 [2021-12-19 17:16:28,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:28,015 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:28,015 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:28,015 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:28,015 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:28,017 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:28,017 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:28,019 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:28,037 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 [2021-12-19 17:16:28,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:28,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:28,038 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) [2021-12-19 17:16:28,041 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 [2021-12-19 17:16:28,042 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 [2021-12-19 17:16:28,049 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:28,049 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:28,049 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:28,049 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:28,049 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:28,050 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:28,050 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:28,061 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:28,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-12-19 17:16:28,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:28,077 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) [2021-12-19 17:16:28,078 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 [2021-12-19 17:16:28,080 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 17:16:28,086 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:28,086 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:28,086 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:28,086 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:28,086 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:28,088 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:28,088 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:28,089 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:28,104 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 [2021-12-19 17:16:28,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:28,105 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) [2021-12-19 17:16:28,106 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 [2021-12-19 17:16:28,108 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 [2021-12-19 17:16:28,119 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:28,119 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:28,119 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:28,119 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:28,119 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:28,121 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:28,121 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:28,128 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 17:16:28,130 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 17:16:28,131 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 17:16:28,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:28,132 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) [2021-12-19 17:16:28,171 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 [2021-12-19 17:16:28,172 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 17:16:28,172 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 17:16:28,172 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 17:16:28,172 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-19 17:16:28,189 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 [2021-12-19 17:16:28,191 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 17:16:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-19 17:16:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 17:16:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:16:28,318 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 [2021-12-19 17:16:28,319 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 17:16:28,398 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 51 states and 63 transitions. Complement of second has 12 states. [2021-12-19 17:16:28,399 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 [2021-12-19 17:16:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 17:16:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-12-19 17:16:28,403 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2021-12-19 17:16:28,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:28,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2021-12-19 17:16:28,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:28,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2021-12-19 17:16:28,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:28,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 63 transitions. [2021-12-19 17:16:28,408 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:28,411 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 26 states and 35 transitions. [2021-12-19 17:16:28,412 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2021-12-19 17:16:28,415 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2021-12-19 17:16:28,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-12-19 17:16:28,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:28,415 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-12-19 17:16:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-12-19 17:16:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-19 17:16:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-19 17:16:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-19 17:16:28,433 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-19 17:16:28,433 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-19 17:16:28,433 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-19 17:16:28,433 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2021-12-19 17:16:28,434 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:28,434 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:16:28,434 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:16:28,434 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 17:16:28,435 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 17:16:28,435 INFO L791 eck$LassoCheckResult]: Stem: 140#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(16, 2);call #Ultimate.allocInit(12, 3); 141#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 143#L29 assume !(main_~x~0#1 < 1); 131#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 133#fibonacciENTRY ~n := #in~n; 134#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 129#L22 call #t~ret4 := fibonacci(~n - 1);< 135#fibonacciENTRY ~n := #in~n; 136#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 142#fibonacciEXIT >#34#return; 128#L22-1 [2021-12-19 17:16:28,435 INFO L793 eck$LassoCheckResult]: Loop: 128#L22-1 call #t~ret5 := fibonacci(~n - 2);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume !(~n < 1); 147#L19 assume !(1 == ~n); 130#L22 call #t~ret4 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 146#fibonacciEXIT >#34#return; 128#L22-1 [2021-12-19 17:16:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1923124650, now seen corresponding path program 1 times [2021-12-19 17:16:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929655555] [2021-12-19 17:16:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:28,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 17:16:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 17:16:28,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:16:28,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929655555] [2021-12-19 17:16:28,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929655555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:16:28,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:16:28,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 17:16:28,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581342980] [2021-12-19 17:16:28,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:16:28,488 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 17:16:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 481649848, now seen corresponding path program 1 times [2021-12-19 17:16:28,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:28,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668432510] [2021-12-19 17:16:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:28,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-19 17:16:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 17:16:28,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:16:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668432510] [2021-12-19 17:16:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668432510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:16:28,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:16:28,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 17:16:28,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807270635] [2021-12-19 17:16:28,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:16:28,517 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:16:28,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:16:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-19 17:16:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-19 17:16:28,520 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 17:16:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:16:28,559 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-12-19 17:16:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 17:16:28,560 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2021-12-19 17:16:28,562 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:28,562 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2021-12-19 17:16:28,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-12-19 17:16:28,563 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-12-19 17:16:28,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2021-12-19 17:16:28,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:28,563 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-19 17:16:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2021-12-19 17:16:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-19 17:16:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-19 17:16:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-19 17:16:28,566 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-19 17:16:28,566 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-19 17:16:28,566 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-19 17:16:28,566 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2021-12-19 17:16:28,566 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:28,567 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:16:28,567 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:16:28,567 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 17:16:28,568 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-19 17:16:28,568 INFO L791 eck$LassoCheckResult]: Stem: 215#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(16, 2);call #Ultimate.allocInit(12, 3); 216#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 219#L29 assume !(main_~x~0#1 < 1); 204#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 221#fibonacciENTRY ~n := #in~n; 210#L17 assume !(~n < 1); 214#L19 assume !(1 == ~n); 205#L22 call #t~ret4 := fibonacci(~n - 1);< 209#fibonacciENTRY ~n := #in~n; 211#L17 assume !(~n < 1); 227#L19 assume 1 == ~n;#res := 1; 226#fibonacciFINAL assume true; 225#fibonacciEXIT >#34#return; 203#L22-1 [2021-12-19 17:16:28,568 INFO L793 eck$LassoCheckResult]: Loop: 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#34#return; 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume ~n < 1;#res := 0; 212#fibonacciFINAL assume true; 217#fibonacciEXIT >#36#return; 218#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 220#fibonacciFINAL assume true; 224#fibonacciEXIT >#34#return; 203#L22-1 [2021-12-19 17:16:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash -512653656, now seen corresponding path program 1 times [2021-12-19 17:16:28,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232177912] [2021-12-19 17:16:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:28,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:28,574 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:28,579 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 1 times [2021-12-19 17:16:28,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:28,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489484178] [2021-12-19 17:16:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:28,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:28,586 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:28,592 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash 911295463, now seen corresponding path program 1 times [2021-12-19 17:16:28,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:28,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187523184] [2021-12-19 17:16:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:28,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 17:16:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-19 17:16:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 17:16:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 17:16:28,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:16:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187523184] [2021-12-19 17:16:28,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187523184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 17:16:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751917814] [2021-12-19 17:16:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:28,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 17:16:28,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:28,647 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) [2021-12-19 17:16:28,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-19 17:16:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 17:16:28,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-19 17:16:28,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 17:16:28,765 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 [2021-12-19 17:16:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 17:16:28,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751917814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 17:16:28,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 17:16:28,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-19 17:16:28,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521228474] [2021-12-19 17:16:28,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 17:16:29,130 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:29,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:29,130 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:29,130 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:29,130 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 17:16:29,131 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,131 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:29,131 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:29,131 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration3_Loop [2021-12-19 17:16:29,131 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:29,131 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:29,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,196 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:29,196 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 17:16:29,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:29,197 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) [2021-12-19 17:16:29,227 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 [2021-12-19 17:16:29,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:29,228 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:29,243 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:29,243 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:29,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-19 17:16:29,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:29,260 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) [2021-12-19 17:16:29,260 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 [2021-12-19 17:16:29,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:29,264 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:29,276 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:29,276 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:29,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:29,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:29,292 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) [2021-12-19 17:16:29,292 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 [2021-12-19 17:16:29,294 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:29,294 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:29,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:29,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:29,331 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 [2021-12-19 17:16:29,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:29,332 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) [2021-12-19 17:16:29,333 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 [2021-12-19 17:16:29,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:29,334 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:29,371 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 [2021-12-19 17:16:29,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:29,392 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) [2021-12-19 17:16:29,392 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 [2021-12-19 17:16:29,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 17:16:29,394 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:29,927 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 17:16:29,931 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 [2021-12-19 17:16:29,931 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:29,931 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:29,931 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:29,931 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:29,931 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 17:16:29,931 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,931 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:29,932 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:29,932 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration3_Loop [2021-12-19 17:16:29,932 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:29,932 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:29,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:29,996 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:29,996 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 17:16:29,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:29,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:30,012 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) [2021-12-19 17:16:30,013 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 [2021-12-19 17:16:30,014 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 [2021-12-19 17:16:30,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:30,020 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:30,020 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:30,020 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:30,020 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:30,021 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:30,021 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:30,047 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:30,064 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 [2021-12-19 17:16:30,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:30,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:30,065 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) [2021-12-19 17:16:30,066 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 [2021-12-19 17:16:30,067 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 [2021-12-19 17:16:30,073 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:30,073 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:30,074 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:30,074 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:30,074 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:30,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:30,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:30,076 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:30,091 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 [2021-12-19 17:16:30,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:30,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:30,092 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 17:16:30,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-19 17:16:30,097 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 [2021-12-19 17:16:30,103 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:30,103 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:30,103 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:30,103 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:30,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:30,103 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:30,104 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:30,110 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:30,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-12-19 17:16:30,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:30,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 17:16:30,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-19 17:16:30,136 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 [2021-12-19 17:16:30,141 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:30,142 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:30,142 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:30,142 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:30,142 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:30,143 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:30,143 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:30,152 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 17:16:30,153 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-19 17:16:30,154 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-19 17:16:30,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:30,155 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 17:16:30,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-19 17:16:30,157 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 17:16:30,157 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 17:16:30,157 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 17:16:30,157 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-19 17:16:30,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:30,189 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 17:16:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 17:16:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 17:16:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:30,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 17:16:30,423 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 [2021-12-19 17:16:30,423 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 17:16:30,579 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 160 states and 216 transitions. Complement of second has 48 states. [2021-12-19 17:16:30,579 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 [2021-12-19 17:16:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 17:16:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2021-12-19 17:16:30,580 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2021-12-19 17:16:30,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:30,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2021-12-19 17:16:30,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:30,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2021-12-19 17:16:30,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:30,582 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2021-12-19 17:16:30,586 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2021-12-19 17:16:30,589 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2021-12-19 17:16:30,589 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2021-12-19 17:16:30,589 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2021-12-19 17:16:30,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2021-12-19 17:16:30,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:30,589 INFO L681 BuchiCegarLoop]: Abstraction has 129 states and 181 transitions. [2021-12-19 17:16:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2021-12-19 17:16:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-12-19 17:16:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-12-19 17:16:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2021-12-19 17:16:30,597 INFO L704 BuchiCegarLoop]: Abstraction has 107 states and 141 transitions. [2021-12-19 17:16:30,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:16:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 17:16:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-19 17:16:30,598 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-19 17:16:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:16:30,639 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-19 17:16:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-19 17:16:30,640 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2021-12-19 17:16:30,641 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:30,642 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2021-12-19 17:16:30,642 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-12-19 17:16:30,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2021-12-19 17:16:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2021-12-19 17:16:30,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:30,642 INFO L681 BuchiCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-12-19 17:16:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2021-12-19 17:16:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-12-19 17:16:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-19 17:16:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-12-19 17:16:30,645 INFO L704 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-19 17:16:30,645 INFO L587 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-19 17:16:30,645 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-19 17:16:30,645 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2021-12-19 17:16:30,645 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-19 17:16:30,645 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:16:30,645 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:16:30,647 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 17:16:30,647 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-19 17:16:30,647 INFO L791 eck$LassoCheckResult]: Stem: 991#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(16, 2);call #Ultimate.allocInit(12, 3); 992#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 995#L29 assume !(main_~x~0#1 < 1); 981#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 983#fibonacciENTRY ~n := #in~n; 984#L17 assume !(~n < 1); 990#L19 assume !(1 == ~n); 980#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 986#L17 assume !(~n < 1); 1013#L19 assume !(1 == ~n); 985#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 987#L17 assume !(~n < 1); 997#L19 assume 1 == ~n;#res := 1; 998#fibonacciFINAL assume true; 1012#fibonacciEXIT >#34#return; 1007#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1008#fibonacciENTRY ~n := #in~n; 1011#L17 assume ~n < 1;#res := 0; 1009#fibonacciFINAL assume true; 1006#fibonacciEXIT >#36#return; 1005#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1004#fibonacciFINAL assume true; 1003#fibonacciEXIT >#34#return; 977#L22-1 [2021-12-19 17:16:30,647 INFO L793 eck$LassoCheckResult]: Loop: 977#L22-1 call #t~ret5 := fibonacci(~n - 2);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume 1 == ~n;#res := 1; 1001#fibonacciFINAL assume true; 1010#fibonacciEXIT >#34#return; 975#L22-1 call #t~ret5 := fibonacci(~n - 2);< 978#fibonacciENTRY ~n := #in~n; 988#L17 assume ~n < 1;#res := 0; 989#fibonacciFINAL assume true; 993#fibonacciEXIT >#36#return; 994#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 996#fibonacciFINAL assume true; 999#fibonacciEXIT >#34#return; 977#L22-1 [2021-12-19 17:16:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash 506180814, now seen corresponding path program 2 times [2021-12-19 17:16:30,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:30,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380160997] [2021-12-19 17:16:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:30,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:30,654 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:30,660 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 2 times [2021-12-19 17:16:30,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224768057] [2021-12-19 17:16:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:30,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:30,664 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:30,668 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1200508531, now seen corresponding path program 3 times [2021-12-19 17:16:30,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:30,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157534400] [2021-12-19 17:16:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:30,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 17:16:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 17:16:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-19 17:16:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 17:16:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-19 17:16:30,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:16:30,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157534400] [2021-12-19 17:16:30,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157534400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 17:16:30,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607475620] [2021-12-19 17:16:30,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 17:16:30,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 17:16:30,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:30,736 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 17:16:30,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-19 17:16:30,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-19 17:16:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 17:16:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-19 17:16:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-19 17:16:30,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 17:16:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 17:16:31,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607475620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 17:16:31,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 17:16:31,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2021-12-19 17:16:31,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235514670] [2021-12-19 17:16:31,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 17:16:31,306 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:31,307 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:31,307 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:31,307 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:31,307 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 17:16:31,307 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:31,307 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:31,307 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:31,307 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration4_Loop [2021-12-19 17:16:31,307 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:31,307 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:31,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:31,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:31,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:31,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:31,341 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:31,342 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 17:16:31,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:31,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:31,380 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) [2021-12-19 17:16:31,381 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 [2021-12-19 17:16:31,383 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:31,383 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:31,391 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:31,391 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:31,406 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 [2021-12-19 17:16:31,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:31,413 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) [2021-12-19 17:16:31,413 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 [2021-12-19 17:16:31,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:31,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:31,442 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 [2021-12-19 17:16:31,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:31,443 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) [2021-12-19 17:16:31,443 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 [2021-12-19 17:16:31,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 17:16:31,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:32,472 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 17:16:32,476 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 [2021-12-19 17:16:32,477 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:32,477 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:32,477 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:32,477 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:32,477 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 17:16:32,477 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:32,477 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:32,477 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:32,477 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration4_Loop [2021-12-19 17:16:32,477 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:32,477 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:32,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:32,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:32,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:32,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:32,514 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:32,514 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 17:16:32,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:32,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:32,515 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) [2021-12-19 17:16:32,532 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 [2021-12-19 17:16:32,538 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:32,539 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:32,539 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:32,539 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:32,539 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:32,539 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:32,539 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:32,542 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 [2021-12-19 17:16:32,559 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:32,577 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 [2021-12-19 17:16:32,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:32,579 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) [2021-12-19 17:16:32,588 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 [2021-12-19 17:16:32,589 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 [2021-12-19 17:16:32,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:32,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:32,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:32,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:32,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:32,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:32,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:32,611 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 17:16:32,612 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-19 17:16:32,612 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-19 17:16:32,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:32,613 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 17:16:32,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-19 17:16:32,616 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 17:16:32,616 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 17:16:32,616 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 17:16:32,616 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-12-19 17:16:32,633 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 [2021-12-19 17:16:32,633 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 17:16:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 17:16:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:32,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 17:16:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 17:16:33,006 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 [2021-12-19 17:16:33,006 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 17:16:33,063 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-12-19 17:16:33,065 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 [2021-12-19 17:16:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 17:16:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-12-19 17:16:33,066 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-12-19 17:16:33,066 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:33,066 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 17:16:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:33,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 17:16:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:33,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 17:16:33,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 17:16:33,405 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 [2021-12-19 17:16:33,406 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 17:16:33,460 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-12-19 17:16:33,460 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 [2021-12-19 17:16:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 17:16:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-12-19 17:16:33,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-12-19 17:16:33,462 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:33,462 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 17:16:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:33,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 17:16:33,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:33,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 17:16:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 17:16:33,738 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 [2021-12-19 17:16:33,738 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 17:16:33,905 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 345 states and 444 transitions. Complement of second has 125 states. [2021-12-19 17:16:33,906 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 [2021-12-19 17:16:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 17:16:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2021-12-19 17:16:33,907 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2021-12-19 17:16:33,909 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:33,909 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2021-12-19 17:16:33,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:33,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2021-12-19 17:16:33,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:33,913 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2021-12-19 17:16:33,923 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-19 17:16:33,932 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2021-12-19 17:16:33,932 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2021-12-19 17:16:33,933 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2021-12-19 17:16:33,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2021-12-19 17:16:33,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:33,934 INFO L681 BuchiCegarLoop]: Abstraction has 220 states and 297 transitions. [2021-12-19 17:16:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2021-12-19 17:16:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2021-12-19 17:16:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2021-12-19 17:16:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2021-12-19 17:16:33,946 INFO L704 BuchiCegarLoop]: Abstraction has 172 states and 223 transitions. [2021-12-19 17:16:33,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:16:33,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-19 17:16:33,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-19 17:16:33,947 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 21 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 13 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2021-12-19 17:16:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:16:34,143 INFO L93 Difference]: Finished difference Result 349 states and 503 transitions. [2021-12-19 17:16:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-19 17:16:34,145 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 503 transitions. [2021-12-19 17:16:34,149 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-19 17:16:34,155 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 339 states and 490 transitions. [2021-12-19 17:16:34,155 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2021-12-19 17:16:34,155 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2021-12-19 17:16:34,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 339 states and 490 transitions. [2021-12-19 17:16:34,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:34,157 INFO L681 BuchiCegarLoop]: Abstraction has 339 states and 490 transitions. [2021-12-19 17:16:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states and 490 transitions. [2021-12-19 17:16:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 274. [2021-12-19 17:16:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 171 states have (on average 1.128654970760234) internal successors, (193), 174 states have internal predecessors, (193), 60 states have call successors, (72), 36 states have call predecessors, (72), 43 states have return successors, (136), 63 states have call predecessors, (136), 58 states have call successors, (136) [2021-12-19 17:16:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2021-12-19 17:16:34,187 INFO L704 BuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2021-12-19 17:16:34,187 INFO L587 BuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2021-12-19 17:16:34,187 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-19 17:16:34,187 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 274 states and 401 transitions. [2021-12-19 17:16:34,188 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-19 17:16:34,188 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:16:34,188 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:16:34,189 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 10, 9, 7, 7, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2021-12-19 17:16:34,189 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-19 17:16:34,189 INFO L791 eck$LassoCheckResult]: Stem: 3005#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(16, 2);call #Ultimate.allocInit(12, 3); 3006#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 3010#L29 assume !(main_~x~0#1 < 1); 3011#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 3015#fibonacciENTRY ~n := #in~n; 3048#L17 assume !(~n < 1); 3046#L19 assume !(1 == ~n); 3038#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3049#L17 assume !(~n < 1); 3145#L19 assume 1 == ~n;#res := 1; 3144#fibonacciFINAL assume true; 3142#fibonacciEXIT >#34#return; 3135#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3137#fibonacciENTRY ~n := #in~n; 3143#L17 assume ~n < 1;#res := 0; 3138#fibonacciFINAL assume true; 3134#fibonacciEXIT >#36#return; 3133#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3132#fibonacciFINAL assume true; 3129#fibonacciEXIT >#34#return; 3077#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3079#fibonacciENTRY ~n := #in~n; 3127#L17 assume !(~n < 1); 3123#L19 assume 1 == ~n;#res := 1; 3026#fibonacciFINAL assume true; 3076#fibonacciEXIT >#36#return; 3072#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3064#fibonacciFINAL assume true; 3054#fibonacciEXIT >#34#return; 3053#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3056#fibonacciENTRY ~n := #in~n; 3128#L17 assume !(~n < 1); 3124#L19 assume !(1 == ~n); 3125#L22 call #t~ret4 := fibonacci(~n - 1);< 3238#fibonacciENTRY ~n := #in~n; 3185#L17 assume !(~n < 1); 3186#L19 assume 1 == ~n;#res := 1; 3239#fibonacciFINAL assume true; 3236#fibonacciEXIT >#34#return; 3068#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3071#fibonacciENTRY ~n := #in~n; 3130#L17 assume ~n < 1;#res := 0; 3081#fibonacciFINAL assume true; 3067#fibonacciEXIT >#36#return; 3070#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3063#fibonacciFINAL assume true; 3052#fibonacciEXIT >#36#return; 3040#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3043#fibonacciFINAL assume true; 3037#fibonacciEXIT >#34#return; 3025#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3031#fibonacciENTRY ~n := #in~n; 3032#L17 assume !(~n < 1); 3023#L19 assume !(1 == ~n); 2996#L22 call #t~ret4 := fibonacci(~n - 1);< 3235#fibonacciENTRY ~n := #in~n; 2994#L17 assume !(~n < 1); 2997#L19 assume !(1 == ~n); 3206#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2021-12-19 17:16:34,189 INFO L793 eck$LassoCheckResult]: Loop: 3207#fibonacciENTRY ~n := #in~n; 3218#L17 assume !(~n < 1); 3215#L19 assume !(1 == ~n); 3205#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2021-12-19 17:16:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1489009265, now seen corresponding path program 4 times [2021-12-19 17:16:34,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373837106] [2021-12-19 17:16:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:34,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:34,200 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:34,210 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 2 times [2021-12-19 17:16:34,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:34,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399240191] [2021-12-19 17:16:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:34,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:34,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:16:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:16:34,213 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:16:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1238644268, now seen corresponding path program 5 times [2021-12-19 17:16:34,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:16:34,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317168396] [2021-12-19 17:16:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:16:34,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:16:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 17:16:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 17:16:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-19 17:16:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-19 17:16:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 17:16:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 17:16:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-19 17:16:34,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:16:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317168396] [2021-12-19 17:16:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317168396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 17:16:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813232516] [2021-12-19 17:16:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-19 17:16:34,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 17:16:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:34,350 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 17:16:34,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-19 17:16:34,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-19 17:16:34,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 17:16:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 17:16:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 109 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-19 17:16:34,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 17:16:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 121 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-19 17:16:34,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813232516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 17:16:34,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 17:16:34,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16] total 21 [2021-12-19 17:16:34,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138950761] [2021-12-19 17:16:34,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 17:16:34,924 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:34,924 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:34,924 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:34,924 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:34,924 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 17:16:34,924 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:34,924 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:34,925 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:34,925 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration5_Loop [2021-12-19 17:16:34,925 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:34,925 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:34,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:34,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:34,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:34,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:34,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:34,950 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:34,950 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 17:16:34,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:34,951 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) [2021-12-19 17:16:34,952 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 [2021-12-19 17:16:34,953 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:34,953 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:34,974 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:34,974 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:34,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:34,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:34,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:34,989 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) [2021-12-19 17:16:35,003 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 [2021-12-19 17:16:35,004 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:35,004 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:35,023 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:35,023 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:35,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:35,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,042 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) [2021-12-19 17:16:35,044 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 [2021-12-19 17:16:35,045 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:35,045 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:35,051 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 17:16:35,051 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 17:16:35,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:35,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,067 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) [2021-12-19 17:16:35,067 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 [2021-12-19 17:16:35,068 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 17:16:35,068 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:35,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:35,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,092 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) [2021-12-19 17:16:35,092 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 [2021-12-19 17:16:35,093 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 17:16:35,093 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 17:16:35,117 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 17:16:35,120 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 [2021-12-19 17:16:35,120 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 17:16:35,120 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 17:16:35,120 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 17:16:35,120 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 17:16:35,120 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 17:16:35,120 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,120 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 17:16:35,120 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 17:16:35,120 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration5_Loop [2021-12-19 17:16:35,120 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 17:16:35,120 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 17:16:35,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:35,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:35,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:35,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:35,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 17:16:35,159 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 17:16:35,159 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 17:16:35,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,161 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) [2021-12-19 17:16:35,161 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 [2021-12-19 17:16:35,162 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 [2021-12-19 17:16:35,168 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:35,168 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:35,168 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:35,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:35,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:35,168 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:35,168 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:35,174 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:35,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:35,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,190 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) [2021-12-19 17:16:35,190 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 [2021-12-19 17:16:35,192 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 [2021-12-19 17:16:35,197 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:35,197 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:35,197 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:35,197 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:35,197 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:35,198 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:35,198 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:35,199 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 17:16:35,213 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 [2021-12-19 17:16:35,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,214 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) [2021-12-19 17:16:35,215 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 [2021-12-19 17:16:35,215 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 [2021-12-19 17:16:35,221 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 17:16:35,221 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 17:16:35,221 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 17:16:35,221 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 17:16:35,221 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 17:16:35,222 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 17:16:35,222 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 17:16:35,223 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 17:16:35,225 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 17:16:35,225 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 17:16:35,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:16:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:16:35,226 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) [2021-12-19 17:16:35,227 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 [2021-12-19 17:16:35,227 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 17:16:35,227 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 17:16:35,228 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 17:16:35,228 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-12-19 17:16:35,244 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 [2021-12-19 17:16:35,244 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 17:16:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:35,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-19 17:16:35,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:35,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 17:16:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:16:35,912 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 [2021-12-19 17:16:35,912 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 17:16:35,961 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2021-12-19 17:16:35,962 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 [2021-12-19 17:16:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 17:16:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-12-19 17:16:35,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2021-12-19 17:16:35,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:35,963 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 17:16:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-19 17:16:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:36,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 17:16:36,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:16:36,635 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 [2021-12-19 17:16:36,636 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 17:16:36,686 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2021-12-19 17:16:36,687 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 [2021-12-19 17:16:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 17:16:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-12-19 17:16:36,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2021-12-19 17:16:36,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:36,688 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 17:16:36,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:16:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-19 17:16:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:16:37,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 17:16:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 17:16:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:16:37,340 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 [2021-12-19 17:16:37,340 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 17:16:37,388 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 349 states and 484 transitions. Complement of second has 14 states. [2021-12-19 17:16:37,389 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 [2021-12-19 17:16:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 17:16:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2021-12-19 17:16:37,389 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 4 letters. [2021-12-19 17:16:37,390 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:37,390 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 76 letters. Loop has 4 letters. [2021-12-19 17:16:37,390 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:37,390 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 8 letters. [2021-12-19 17:16:37,390 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 17:16:37,390 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 484 transitions. [2021-12-19 17:16:37,393 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-12-19 17:16:37,395 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 288 states and 417 transitions. [2021-12-19 17:16:37,396 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 138 [2021-12-19 17:16:37,396 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2021-12-19 17:16:37,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 288 states and 417 transitions. [2021-12-19 17:16:37,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 17:16:37,396 INFO L681 BuchiCegarLoop]: Abstraction has 288 states and 417 transitions. [2021-12-19 17:16:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states and 417 transitions. [2021-12-19 17:16:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2021-12-19 17:16:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 176 states have (on average 1.125) internal successors, (198), 179 states have internal predecessors, (198), 61 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (138), 63 states have call predecessors, (138), 59 states have call successors, (138) [2021-12-19 17:16:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 409 transitions. [2021-12-19 17:16:37,409 INFO L704 BuchiCegarLoop]: Abstraction has 280 states and 409 transitions. [2021-12-19 17:16:37,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:16:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-19 17:16:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-12-19 17:16:37,410 INFO L87 Difference]: Start difference. First operand 280 states and 409 transitions. Second operand has 21 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-19 17:16:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:16:37,563 INFO L93 Difference]: Finished difference Result 408 states and 601 transitions. [2021-12-19 17:16:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-19 17:16:37,564 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 601 transitions. [2021-12-19 17:16:37,567 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-19 17:16:37,567 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 0 states and 0 transitions. [2021-12-19 17:16:37,567 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-19 17:16:37,567 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-19 17:16:37,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-19 17:16:37,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:16:37,567 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 17:16:37,567 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 17:16:37,567 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 17:16:37,567 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-19 17:16:37,567 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-19 17:16:37,567 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-19 17:16:37,567 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-19 17:16:37,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.12 05:16:37 BoogieIcfgContainer [2021-12-19 17:16:37,572 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-19 17:16:37,572 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-19 17:16:37,572 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-19 17:16:37,572 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-19 17:16:37,573 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:16:27" (3/4) ... [2021-12-19 17:16:37,574 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-19 17:16:37,574 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-19 17:16:37,575 INFO L158 Benchmark]: Toolchain (without parser) took 10783.82ms. Allocated memory was 96.5MB in the beginning and 220.2MB in the end (delta: 123.7MB). Free memory was 69.6MB in the beginning and 186.8MB in the end (delta: -117.3MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-12-19 17:16:37,575 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 56.2MB in the beginning and 56.2MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 17:16:37,575 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.25ms. Allocated memory was 96.5MB in the beginning and 151.0MB in the end (delta: 54.5MB). Free memory was 69.3MB in the beginning and 127.9MB in the end (delta: -58.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-19 17:16:37,575 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.46ms. Allocated memory is still 151.0MB. Free memory was 127.9MB in the beginning and 126.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-19 17:16:37,576 INFO L158 Benchmark]: Boogie Preprocessor took 9.75ms. Allocated memory is still 151.0MB. Free memory was 126.3MB in the beginning and 125.8MB in the end (delta: 521.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 17:16:37,576 INFO L158 Benchmark]: RCFGBuilder took 216.44ms. Allocated memory is still 151.0MB. Free memory was 125.8MB in the beginning and 116.9MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-19 17:16:37,576 INFO L158 Benchmark]: BuchiAutomizer took 10355.34ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 116.9MB in the beginning and 186.9MB in the end (delta: -70.0MB). Peak memory consumption was 1.8MB. Max. memory is 16.1GB. [2021-12-19 17:16:37,576 INFO L158 Benchmark]: Witness Printer took 2.17ms. Allocated memory is still 220.2MB. Free memory was 186.9MB in the beginning and 186.8MB in the end (delta: 5.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 17:16:37,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 56.2MB in the beginning and 56.2MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.25ms. Allocated memory was 96.5MB in the beginning and 151.0MB in the end (delta: 54.5MB). Free memory was 69.3MB in the beginning and 127.9MB in the end (delta: -58.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.46ms. Allocated memory is still 151.0MB. Free memory was 127.9MB in the beginning and 126.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 9.75ms. Allocated memory is still 151.0MB. Free memory was 126.3MB in the beginning and 125.8MB in the end (delta: 521.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 216.44ms. Allocated memory is still 151.0MB. Free memory was 125.8MB in the beginning and 116.9MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 10355.34ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 116.9MB in the beginning and 186.9MB in the end (delta: -70.0MB). Peak memory consumption was 1.8MB. Max. memory is 16.1GB. * Witness Printer took 2.17ms. Allocated memory is still 220.2MB. Free memory was 186.9MB in the beginning and 186.8MB in the end (delta: 5.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (4 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.3s and 6 iterations. TraceHistogramMax:12. Analysis of lassos took 5.5s. Construction of modules took 0.4s. Büchi inclusion checks took 4.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 151 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 274 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 471 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 442 mSDsluCounter, 384 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 318 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 711 IncrementalHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 318 mSolverCounterUnsat, 161 mSDtfsCounter, 711 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp75 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 20ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-19 17:16:37,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:37,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-19 17:16:38,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-19 17:16:38,238 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