./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 02:40:08,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 02:40:08,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 02:40:08,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 02:40:08,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 02:40:08,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 02:40:08,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 02:40:08,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 02:40:08,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 02:40:08,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 02:40:08,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 02:40:08,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 02:40:08,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 02:40:08,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 02:40:08,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 02:40:08,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 02:40:08,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 02:40:08,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 02:40:08,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 02:40:08,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 02:40:08,810 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 02:40:08,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 02:40:08,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 02:40:08,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 02:40:08,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 02:40:08,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 02:40:08,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 02:40:08,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 02:40:08,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 02:40:08,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 02:40:08,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 02:40:08,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 02:40:08,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 02:40:08,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 02:40:08,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 02:40:08,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 02:40:08,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 02:40:08,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 02:40:08,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 02:40:08,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 02:40:08,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 02:40:08,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 02:40:08,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-22 02:40:08,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 02:40:08,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 02:40:08,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 02:40:08,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 02:40:08,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 02:40:08,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 02:40:08,859 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 02:40:08,859 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 02:40:08,860 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 02:40:08,860 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 02:40:08,860 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 02:40:08,861 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 02:40:08,861 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 02:40:08,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 02:40:08,861 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 02:40:08,861 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 02:40:08,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 02:40:08,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 02:40:08,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 02:40:08,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 02:40:08,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 02:40:08,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 02:40:08,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 02:40:08,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 02:40:08,863 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 02:40:08,863 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 02:40:08,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 02:40:08,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 02:40:08,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 02:40:08,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 02:40:08,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 02:40:08,867 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 02:40:08,867 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 [2022-07-22 02:40:09,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 02:40:09,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 02:40:09,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 02:40:09,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 02:40:09,236 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 02:40:09,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2022-07-22 02:40:09,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2474cd93/14a690acb8374207bc1b2ded9eba83a9/FLAG1a5848713 [2022-07-22 02:40:09,697 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 02:40:09,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2022-07-22 02:40:09,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2474cd93/14a690acb8374207bc1b2ded9eba83a9/FLAG1a5848713 [2022-07-22 02:40:10,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2474cd93/14a690acb8374207bc1b2ded9eba83a9 [2022-07-22 02:40:10,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 02:40:10,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 02:40:10,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 02:40:10,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 02:40:10,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 02:40:10,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd8067e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10, skipping insertion in model container [2022-07-22 02:40:10,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 02:40:10,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 02:40:10,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c[743,756] [2022-07-22 02:40:10,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 02:40:10,280 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 02:40:10,295 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c[743,756] [2022-07-22 02:40:10,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 02:40:10,311 INFO L208 MainTranslator]: Completed translation [2022-07-22 02:40:10,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10 WrapperNode [2022-07-22 02:40:10,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 02:40:10,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 02:40:10,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 02:40:10,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 02:40:10,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,340 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-22 02:40:10,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 02:40:10,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 02:40:10,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 02:40:10,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 02:40:10,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 02:40:10,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 02:40:10,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 02:40:10,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 02:40:10,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:10,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:10,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:10,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 02:40:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 02:40:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 02:40:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 02:40:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 02:40:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-07-22 02:40:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-07-22 02:40:10,544 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 02:40:10,546 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 02:40:10,654 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 02:40:10,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 02:40:10,661 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 02:40:10,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:40:10 BoogieIcfgContainer [2022-07-22 02:40:10,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 02:40:10,665 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 02:40:10,665 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 02:40:10,668 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 02:40:10,668 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 02:40:10,668 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 02:40:10" (1/3) ... [2022-07-22 02:40:10,670 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4f0ae79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 02:40:10, skipping insertion in model container [2022-07-22 02:40:10,670 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 02:40:10,670 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (2/3) ... [2022-07-22 02:40:10,670 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4f0ae79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 02:40:10, skipping insertion in model container [2022-07-22 02:40:10,670 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 02:40:10,671 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:40:10" (3/3) ... [2022-07-22 02:40:10,672 INFO L354 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2022-07-22 02:40:10,768 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 02:40:10,769 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-22 02:40:10,769 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 02:40:10,769 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 02:40:10,769 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 02:40:10,769 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-22 02:40:10,769 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 02:40:10,769 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 02:40:10,780 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 02:40:10,805 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:10,805 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:10,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:10,819 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 02:40:10,820 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:10,820 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 02:40:10,820 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 02:40:10,824 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:10,825 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:10,825 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:10,825 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 02:40:10,826 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:10,832 INFO L752 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 5#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 6#fiboENTRYtrue [2022-07-22 02:40:10,833 INFO L754 eck$LassoCheckResult]: Loop: 6#fiboENTRYtrue ~n := #in~n; 7#L8true assume !(~n < 1); 9#L10true assume !(1 == ~n); 14#L13true call #t~ret4 := fibo(~n - 1);< 6#fiboENTRYtrue [2022-07-22 02:40:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2022-07-22 02:40:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:10,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957759854] [2022-07-22 02:40:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:10,939 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:10,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2022-07-22 02:40:10,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:10,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852454342] [2022-07-22 02:40:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:10,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:10,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2022-07-22 02:40:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:11,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392004953] [2022-07-22 02:40:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,028 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:11,143 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:11,145 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:11,145 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:11,145 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:11,146 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:11,146 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,146 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:11,146 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:11,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2022-07-22 02:40:11,147 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:11,147 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:11,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,233 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:11,234 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:11,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-07-22 02:40:11,333 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,333 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,357 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:11,358 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:11,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-07-22 02:40:11,416 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:11,416 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:11,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-07-22 02:40:11,451 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,451 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,472 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:11,472 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:11,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-07-22 02:40:11,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,507 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-07-22 02:40:11,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:11,562 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,647 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:11,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,655 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:11,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:11,655 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:11,655 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:11,655 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:11,655 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,655 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:11,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:11,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2022-07-22 02:40:11,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:11,656 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:11,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,705 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:11,721 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:11,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-07-22 02:40:11,731 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,739 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,740 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,740 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,740 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,741 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,742 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,743 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,760 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:11,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-07-22 02:40:11,791 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,799 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,799 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,799 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,799 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,800 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,800 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,800 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,815 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:11,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,842 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,850 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,858 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,858 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,858 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,858 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,859 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,859 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-07-22 02:40:11,870 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:11,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-22 02:40:11,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,911 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,911 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,911 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,913 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,913 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,935 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:11,940 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 02:40:11,940 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 02:40:11,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-07-22 02:40:11,947 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:11,947 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:11,947 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:11,948 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-22 02:40:11,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,970 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 02:40:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,085 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-07-22 02:40:12,086 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 02:40:12,171 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2022-07-22 02:40:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 02:40:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2022-07-22 02:40:12,179 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-22 02:40:12,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:12,179 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-22 02:40:12,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:12,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-22 02:40:12,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:12,181 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2022-07-22 02:40:12,184 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,188 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2022-07-22 02:40:12,189 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-22 02:40:12,189 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-22 02:40:12,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2022-07-22 02:40:12,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:12,190 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-22 02:40:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2022-07-22 02:40:12,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-22 02:40:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 02:40:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-22 02:40:12,212 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 02:40:12,212 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 02:40:12,212 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-22 02:40:12,212 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2022-07-22 02:40:12,213 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,213 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:12,213 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:12,214 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,214 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,214 INFO L752 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 123#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 128#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret4 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2022-07-22 02:40:12,215 INFO L754 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret4 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2022-07-22 02:40:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2022-07-22 02:40:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651886573] [2022-07-22 02:40:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 02:40:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 02:40:12,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651886573] [2022-07-22 02:40:12,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651886573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 02:40:12,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 02:40:12,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 02:40:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235764263] [2022-07-22 02:40:12,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 02:40:12,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:12,315 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2022-07-22 02:40:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482233288] [2022-07-22 02:40:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 02:40:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 02:40:12,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482233288] [2022-07-22 02:40:12,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482233288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 02:40:12,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 02:40:12,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 02:40:12,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226352885] [2022-07-22 02:40:12,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 02:40:12,363 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-22 02:40:12,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 02:40:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 02:40:12,367 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:12,455 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-22 02:40:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 02:40:12,456 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2022-07-22 02:40:12,459 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,460 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2022-07-22 02:40:12,460 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-22 02:40:12,460 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-07-22 02:40:12,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2022-07-22 02:40:12,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:12,461 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 02:40:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2022-07-22 02:40:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 02:40:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 02:40:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-22 02:40:12,465 INFO L392 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 02:40:12,465 INFO L374 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 02:40:12,465 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-22 02:40:12,465 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2022-07-22 02:40:12,466 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,466 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:12,466 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:12,467 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,467 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,467 INFO L752 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 196#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 201#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret4 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2022-07-22 02:40:12,468 INFO L754 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret5 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret4 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2022-07-22 02:40:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2022-07-22 02:40:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683475379] [2022-07-22 02:40:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 02:40:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:12,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683475379] [2022-07-22 02:40:12,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683475379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:12,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927867577] [2022-07-22 02:40:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 02:40:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 02:40:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927867577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:12,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:12,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 02:40:12,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113165676] [2022-07-22 02:40:12,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:12,740 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2022-07-22 02:40:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975074888] [2022-07-22 02:40:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:12,748 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:12,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:12,853 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:12,853 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:12,853 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:12,853 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:12,853 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:12,853 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,854 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:12,854 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:12,854 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2022-07-22 02:40:12,854 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:12,854 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:12,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,906 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:12,907 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:12,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,908 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-07-22 02:40:12,911 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:12,911 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:12,934 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:12,934 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:12,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,961 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-07-22 02:40:12,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:12,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:12,979 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:12,979 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:13,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:13,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:13,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:13,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:13,016 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:13,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-07-22 02:40:13,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:13,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:13,058 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:13,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-22 02:40:13,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:13,061 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:13,929 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:13,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:13,935 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:13,935 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:13,935 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:13,935 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:13,935 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:13,935 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,935 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:13,936 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:13,936 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2022-07-22 02:40:13,936 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:13,936 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:13,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,992 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:13,993 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:13,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:13,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-22 02:40:14,008 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 [2022-07-22 02:40:14,016 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:14,016 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:14,016 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:14,016 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:14,016 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:14,017 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:14,018 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:14,027 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:14,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:14,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:14,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,053 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-22 02:40:14,064 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:14,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:14,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:14,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:14,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:14,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:14,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:14,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:14,083 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:14,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-07-22 02:40:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,100 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-22 02:40:14,102 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:14,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:14,108 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:14,108 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:14,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:14,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:14,110 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:14,110 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:14,120 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:14,123 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 02:40:14,123 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 02:40:14,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:14,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-07-22 02:40:14,133 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:14,133 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:14,133 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:14,133 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-22 02:40:14,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:14,159 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 02:40:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 02:40:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:14,365 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2022-07-22 02:40:14,365 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 02:40:14,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:14,589 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2022-07-22 02:40:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 02:40:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-22 02:40:14,592 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2022-07-22 02:40:14,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:14,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2022-07-22 02:40:14,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:14,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2022-07-22 02:40:14,594 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:14,594 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2022-07-22 02:40:14,600 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-22 02:40:14,604 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2022-07-22 02:40:14,605 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2022-07-22 02:40:14,605 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2022-07-22 02:40:14,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2022-07-22 02:40:14,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:14,606 INFO L369 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-07-22 02:40:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2022-07-22 02:40:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-22 02:40:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-22 02:40:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-22 02:40:14,619 INFO L392 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-22 02:40:14,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 02:40:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-22 02:40:14,620 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 02:40:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:14,725 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2022-07-22 02:40:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 02:40:14,726 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2022-07-22 02:40:14,730 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-22 02:40:14,734 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2022-07-22 02:40:14,734 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2022-07-22 02:40:14,735 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2022-07-22 02:40:14,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2022-07-22 02:40:14,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:14,735 INFO L369 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-07-22 02:40:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2022-07-22 02:40:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-07-22 02:40:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2022-07-22 02:40:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-07-22 02:40:14,746 INFO L392 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-22 02:40:14,747 INFO L374 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-22 02:40:14,747 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-22 02:40:14,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2022-07-22 02:40:14,749 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-22 02:40:14,749 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:14,749 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:14,751 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:14,751 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2022-07-22 02:40:14,751 INFO L752 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2022-07-22 02:40:14,751 INFO L754 eck$LassoCheckResult]: Loop: 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#33#return; 824#L13-1 [2022-07-22 02:40:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2022-07-22 02:40:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648272630] [2022-07-22 02:40:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 02:40:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648272630] [2022-07-22 02:40:14,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648272630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800361324] [2022-07-22 02:40:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:14,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,876 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 02:40:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 02:40:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:14,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 02:40:15,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800361324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:15,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:15,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-07-22 02:40:15,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002848152] [2022-07-22 02:40:15,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:15,221 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2022-07-22 02:40:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863642459] [2022-07-22 02:40:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:15,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 02:40:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 02:40:15,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:15,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863642459] [2022-07-22 02:40:15,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863642459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:15,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277878203] [2022-07-22 02:40:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:15,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:15,340 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:15,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 02:40:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 02:40:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 02:40:15,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 02:40:15,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277878203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:15,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:15,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 02:40:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264681114] [2022-07-22 02:40:15,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:15,543 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-22 02:40:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 02:40:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-22 02:40:15,546 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 02:40:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:15,902 INFO L93 Difference]: Finished difference Result 174 states and 225 transitions. [2022-07-22 02:40:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 02:40:15,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 174 states and 225 transitions. [2022-07-22 02:40:15,907 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2022-07-22 02:40:15,911 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 174 states to 163 states and 214 transitions. [2022-07-22 02:40:15,911 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2022-07-22 02:40:15,911 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2022-07-22 02:40:15,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 214 transitions. [2022-07-22 02:40:15,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:15,912 INFO L369 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-22 02:40:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 214 transitions. [2022-07-22 02:40:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-22 02:40:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 108 states have internal predecessors, (117), 39 states have call successors, (40), 21 states have call predecessors, (40), 22 states have return successors, (57), 33 states have call predecessors, (57), 36 states have call successors, (57) [2022-07-22 02:40:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2022-07-22 02:40:15,925 INFO L392 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-22 02:40:15,925 INFO L374 stractBuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-22 02:40:15,925 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-22 02:40:15,925 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 214 transitions. [2022-07-22 02:40:15,927 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2022-07-22 02:40:15,927 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:15,927 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:15,929 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:15,929 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-22 02:40:15,929 INFO L752 eck$LassoCheckResult]: Stem: 1602#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 1603#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 1611#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1618#fiboENTRY ~n := #in~n; 1630#L8 assume !(~n < 1); 1631#L10 assume !(1 == ~n); 1610#L13 call #t~ret4 := fibo(~n - 1);< 1612#fiboENTRY ~n := #in~n; 1625#L8 assume !(~n < 1); 1683#L10 assume !(1 == ~n); 1679#L13 call #t~ret4 := fibo(~n - 1);< 1682#fiboENTRY ~n := #in~n; 1681#L8 assume !(~n < 1); 1680#L10 assume !(1 == ~n); 1675#L13 call #t~ret4 := fibo(~n - 1);< 1678#fiboENTRY ~n := #in~n; 1677#L8 assume !(~n < 1); 1676#L10 assume !(1 == ~n); 1671#L13 call #t~ret4 := fibo(~n - 1);< 1674#fiboENTRY ~n := #in~n; 1673#L8 assume !(~n < 1); 1672#L10 assume !(1 == ~n); 1667#L13 call #t~ret4 := fibo(~n - 1);< 1670#fiboENTRY ~n := #in~n; 1669#L8 assume !(~n < 1); 1668#L10 assume !(1 == ~n); 1654#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1666#L8 assume !(~n < 1); 1665#L10 assume !(1 == ~n); 1653#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1666#L8 assume !(~n < 1); 1665#L10 assume !(1 == ~n); 1653#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1664#L8 assume !(~n < 1); 1663#L10 assume 1 == ~n;#res := 1; 1661#fiboFINAL assume true; 1659#fiboEXIT >#33#return; 1635#L13-1 call #t~ret5 := fibo(~n - 2);< 1655#fiboENTRY ~n := #in~n; 1739#L8 assume ~n < 1;#res := 0; 1737#fiboFINAL assume true; 1736#fiboEXIT >#35#return; 1735#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1734#fiboFINAL assume true; 1716#fiboEXIT >#33#return; 1709#L13-1 [2022-07-22 02:40:15,929 INFO L754 eck$LassoCheckResult]: Loop: 1709#L13-1 call #t~ret5 := fibo(~n - 2);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume !(1 == ~n); 1706#L13 call #t~ret4 := fibo(~n - 1);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume !(1 == ~n); 1706#L13 call #t~ret4 := fibo(~n - 1);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume 1 == ~n;#res := 1; 1743#fiboFINAL assume true; 1705#fiboEXIT >#33#return; 1713#L13-1 call #t~ret5 := fibo(~n - 2);< 1730#fiboENTRY ~n := #in~n; 1747#L8 assume ~n < 1;#res := 0; 1745#fiboFINAL assume true; 1750#fiboEXIT >#35#return; 1715#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1738#fiboFINAL assume true; 1717#fiboEXIT >#33#return; 1709#L13-1 [2022-07-22 02:40:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1960159334, now seen corresponding path program 2 times [2022-07-22 02:40:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:15,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412522616] [2022-07-22 02:40:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 02:40:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:16,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412522616] [2022-07-22 02:40:16,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412522616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268705635] [2022-07-22 02:40:16,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 02:40:16,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,174 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 02:40:16,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 02:40:16,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 02:40:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 02:40:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:16,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 02:40:16,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268705635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:16,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:16,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 23 [2022-07-22 02:40:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449429696] [2022-07-22 02:40:16,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:16,514 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:16,514 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2022-07-22 02:40:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:16,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779137202] [2022-07-22 02:40:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:16,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:16,520 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:16,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:16,716 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:16,716 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:16,716 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:16,716 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:16,716 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:16,716 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,716 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:16,716 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:16,716 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2022-07-22 02:40:16,716 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:16,716 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:16,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,751 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:16,751 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,753 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:16,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:16,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-22 02:40:16,780 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:16,780 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:16,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2022-07-22 02:40:16,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,832 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-07-22 02:40:16,834 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:16,834 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:16,841 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:16,841 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:16,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,861 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-07-22 02:40:16,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:16,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:16,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2022-07-22 02:40:16,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,891 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-07-22 02:40:16,893 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:16,893 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:17,886 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:17,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2022-07-22 02:40:17,890 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:17,890 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:17,890 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:17,890 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:17,890 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:17,890 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,891 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:17,891 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:17,891 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2022-07-22 02:40:17,891 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:17,891 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:17,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,933 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:17,934 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,935 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-07-22 02:40:17,938 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:17,944 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:17,944 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:17,944 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:17,944 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:17,944 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:17,945 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:17,945 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:17,947 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:17,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2022-07-22 02:40:17,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,965 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-07-22 02:40:17,967 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:17,973 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:17,973 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:17,974 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:17,974 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:17,974 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:17,974 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:17,974 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:17,975 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:17,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,995 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-07-22 02:40:17,997 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:18,003 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:18,003 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:18,003 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:18,003 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:18,004 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:18,004 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:18,004 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:18,027 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:18,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2022-07-22 02:40:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:18,046 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) [2022-07-22 02:40:18,047 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 [2022-07-22 02:40:18,048 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:18,054 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:18,054 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:18,054 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:18,055 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:18,055 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:18,059 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:18,059 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:18,061 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:18,063 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 02:40:18,063 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 02:40:18,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:18,065 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:18,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2022-07-22 02:40:18,067 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:18,067 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:18,067 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:18,067 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-22 02:40:18,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2022-07-22 02:40:18,085 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:18,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:18,557 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 02:40:18,557 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:18,774 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 296 states and 402 transitions. Complement of second has 45 states. [2022-07-22 02:40:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2022-07-22 02:40:18,778 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-22 02:40:18,778 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:18,778 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 02:40:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:19,222 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 02:40:19,223 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:19,364 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 357 states and 475 transitions. Complement of second has 25 states. [2022-07-22 02:40:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2022-07-22 02:40:19,367 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-22 02:40:19,367 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,367 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:19,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 02:40:19,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:19,731 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 02:40:19,731 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:19,961 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1282 states and 1787 transitions. Complement of second has 138 states. [2022-07-22 02:40:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2022-07-22 02:40:19,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-22 02:40:19,968 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,968 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 70 letters. Loop has 22 letters. [2022-07-22 02:40:19,969 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,969 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 44 letters. [2022-07-22 02:40:19,972 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,972 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1282 states and 1787 transitions. [2022-07-22 02:40:19,995 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2022-07-22 02:40:20,019 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1282 states to 770 states and 1148 transitions. [2022-07-22 02:40:20,020 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 300 [2022-07-22 02:40:20,022 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 338 [2022-07-22 02:40:20,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1148 transitions. [2022-07-22 02:40:20,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:20,027 INFO L369 hiAutomatonCegarLoop]: Abstraction has 770 states and 1148 transitions. [2022-07-22 02:40:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1148 transitions. [2022-07-22 02:40:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 615. [2022-07-22 02:40:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 375 states have (on average 1.1653333333333333) internal successors, (437), 399 states have internal predecessors, (437), 146 states have call successors, (160), 74 states have call predecessors, (160), 94 states have return successors, (270), 141 states have call predecessors, (270), 136 states have call successors, (270) [2022-07-22 02:40:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 867 transitions. [2022-07-22 02:40:20,073 INFO L392 hiAutomatonCegarLoop]: Abstraction has 615 states and 867 transitions. [2022-07-22 02:40:20,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 02:40:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-07-22 02:40:20,074 INFO L87 Difference]: Start difference. First operand 615 states and 867 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 15 states have internal predecessors, (43), 13 states have call successors, (13), 8 states have call predecessors, (13), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 02:40:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:20,449 INFO L93 Difference]: Finished difference Result 747 states and 1037 transitions. [2022-07-22 02:40:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 02:40:20,450 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 747 states and 1037 transitions. [2022-07-22 02:40:20,461 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:20,473 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 747 states to 739 states and 1022 transitions. [2022-07-22 02:40:20,473 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 309 [2022-07-22 02:40:20,473 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 312 [2022-07-22 02:40:20,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 739 states and 1022 transitions. [2022-07-22 02:40:20,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:20,474 INFO L369 hiAutomatonCegarLoop]: Abstraction has 739 states and 1022 transitions. [2022-07-22 02:40:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states and 1022 transitions. [2022-07-22 02:40:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 713. [2022-07-22 02:40:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 436 states have (on average 1.1490825688073394) internal successors, (501), 461 states have internal predecessors, (501), 172 states have call successors, (186), 87 states have call predecessors, (186), 105 states have return successors, (307), 164 states have call predecessors, (307), 160 states have call successors, (307) [2022-07-22 02:40:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 994 transitions. [2022-07-22 02:40:20,499 INFO L392 hiAutomatonCegarLoop]: Abstraction has 713 states and 994 transitions. [2022-07-22 02:40:20,499 INFO L374 stractBuchiCegarLoop]: Abstraction has 713 states and 994 transitions. [2022-07-22 02:40:20,499 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-22 02:40:20,499 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 713 states and 994 transitions. [2022-07-22 02:40:20,505 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:20,505 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:20,505 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:20,506 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:20,506 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:20,506 INFO L752 eck$LassoCheckResult]: Stem: 6320#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 6321#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 6337#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 6338#fiboENTRY ~n := #in~n; 6392#L8 assume !(~n < 1); 6391#L10 assume !(1 == ~n); 6387#L13 call #t~ret4 := fibo(~n - 1);< 6390#fiboENTRY ~n := #in~n; 6389#L8 assume !(~n < 1); 6388#L10 assume !(1 == ~n); 6383#L13 call #t~ret4 := fibo(~n - 1);< 6386#fiboENTRY ~n := #in~n; 6385#L8 assume !(~n < 1); 6384#L10 assume !(1 == ~n); 6379#L13 call #t~ret4 := fibo(~n - 1);< 6382#fiboENTRY ~n := #in~n; 6381#L8 assume !(~n < 1); 6380#L10 assume !(1 == ~n); 6375#L13 call #t~ret4 := fibo(~n - 1);< 6378#fiboENTRY ~n := #in~n; 6377#L8 assume !(~n < 1); 6376#L10 assume !(1 == ~n); 6371#L13 call #t~ret4 := fibo(~n - 1);< 6374#fiboENTRY ~n := #in~n; 6373#L8 assume !(~n < 1); 6372#L10 assume !(1 == ~n); 6359#L13 call #t~ret4 := fibo(~n - 1);< 6370#fiboENTRY ~n := #in~n; 6369#L8 assume !(~n < 1); 6368#L10 assume !(1 == ~n); 6364#L13 call #t~ret4 := fibo(~n - 1);< 6363#fiboENTRY ~n := #in~n; 6367#L8 assume !(~n < 1); 6648#L10 assume !(1 == ~n); 6365#L13 call #t~ret4 := fibo(~n - 1);< 6363#fiboENTRY ~n := #in~n; 6366#L8 assume !(~n < 1); 6875#L10 assume 1 == ~n;#res := 1; 6874#fiboFINAL assume true; 6730#fiboEXIT >#33#return; 6671#L13-1 call #t~ret5 := fibo(~n - 2);< 6676#fiboENTRY ~n := #in~n; 6942#L8 assume !(~n < 1); 6884#L10 assume !(1 == ~n); 6886#L13 call #t~ret4 := fibo(~n - 1);< 6920#fiboENTRY ~n := #in~n; 6947#L8 assume !(~n < 1); 6922#L10 assume !(1 == ~n); 6923#L13 call #t~ret4 := fibo(~n - 1);< 6938#fiboENTRY [2022-07-22 02:40:20,506 INFO L754 eck$LassoCheckResult]: Loop: 6938#fiboENTRY ~n := #in~n; 6944#L8 assume !(~n < 1); 6943#L10 assume !(1 == ~n); 6937#L13 call #t~ret4 := fibo(~n - 1);< 6938#fiboENTRY [2022-07-22 02:40:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 134483699, now seen corresponding path program 1 times [2022-07-22 02:40:20,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:20,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076259686] [2022-07-22 02:40:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:20,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 02:40:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:20,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:20,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076259686] [2022-07-22 02:40:20,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076259686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:20,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719547245] [2022-07-22 02:40:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:20,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:20,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,708 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 02:40:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 02:40:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:20,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:20,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719547245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:20,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-07-22 02:40:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283411068] [2022-07-22 02:40:20,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:20,904 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2022-07-22 02:40:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:20,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852069585] [2022-07-22 02:40:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:20,907 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:20,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:20,948 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:20,948 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:20,949 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:20,949 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:20,949 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:20,949 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,949 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:20,949 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:20,949 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2022-07-22 02:40:20,949 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:20,950 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:20,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,991 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:20,991 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:20,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,993 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:21,000 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:21,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-07-22 02:40:21,036 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:21,036 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:21,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:21,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,075 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-07-22 02:40:21,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:21,078 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:21,099 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:21,100 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:21,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:21,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,130 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2022-07-22 02:40:21,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:21,133 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:21,143 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:21,143 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:21,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2022-07-22 02:40:21,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,162 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2022-07-22 02:40:21,164 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:21,164 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:21,179 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:21,180 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:21,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2022-07-22 02:40:21,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,197 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2022-07-22 02:40:21,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:21,200 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:21,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2022-07-22 02:40:21,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,223 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2022-07-22 02:40:21,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:21,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:21,315 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:21,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:21,319 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:21,319 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:21,319 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:21,319 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:21,319 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:21,319 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,319 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:21,319 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:21,319 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2022-07-22 02:40:21,320 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:21,320 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:21,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:21,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:21,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:21,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:21,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:21,372 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:21,372 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:21,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,374 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2022-07-22 02:40:21,379 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:21,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:21,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:21,389 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:21,389 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:21,389 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:21,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:21,390 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:21,395 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:21,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2022-07-22 02:40:21,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,412 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2022-07-22 02:40:21,415 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:21,420 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:21,420 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:21,420 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:21,420 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:21,421 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:21,421 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:21,421 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:21,422 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:21,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:21,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,439 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2022-07-22 02:40:21,441 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:21,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:21,447 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:21,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:21,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:21,447 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:21,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:21,448 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:21,449 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:21,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2022-07-22 02:40:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,471 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2022-07-22 02:40:21,473 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:21,479 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:21,479 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:21,479 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:21,479 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:21,479 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:21,480 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:21,480 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:21,487 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:21,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2022-07-22 02:40:21,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,504 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2022-07-22 02:40:21,506 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:21,511 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:21,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:21,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:21,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:21,512 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:21,513 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:21,513 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:21,518 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:21,519 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 02:40:21,519 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 02:40:21,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:21,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:21,521 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:21,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2022-07-22 02:40:21,523 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:21,523 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:21,523 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:21,523 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-22 02:40:21,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2022-07-22 02:40:21,539 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:21,721 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 [2022-07-22 02:40:21,721 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,782 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 738 states and 1019 transitions. Complement of second has 13 states. [2022-07-22 02:40:21,782 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 [2022-07-22 02:40:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-22 02:40:21,783 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-22 02:40:21,783 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:21,783 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:21,994 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 [2022-07-22 02:40:21,994 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:22,051 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 738 states and 1019 transitions. Complement of second has 13 states. [2022-07-22 02:40:22,051 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 [2022-07-22 02:40:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-22 02:40:22,052 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-22 02:40:22,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:22,052 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 02:40:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:22,245 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 [2022-07-22 02:40:22,245 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:22,316 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 959 states and 1259 transitions. Complement of second has 14 states. [2022-07-22 02:40:22,317 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 [2022-07-22 02:40:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2022-07-22 02:40:22,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-22 02:40:22,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:22,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2022-07-22 02:40:22,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:22,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2022-07-22 02:40:22,319 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:22,319 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1259 transitions. [2022-07-22 02:40:22,331 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:22,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 770 states and 1058 transitions. [2022-07-22 02:40:22,341 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 254 [2022-07-22 02:40:22,342 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2022-07-22 02:40:22,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1058 transitions. [2022-07-22 02:40:22,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:22,342 INFO L369 hiAutomatonCegarLoop]: Abstraction has 770 states and 1058 transitions. [2022-07-22 02:40:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1058 transitions. [2022-07-22 02:40:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 737. [2022-07-22 02:40:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 459 states have (on average 1.1416122004357299) internal successors, (524), 484 states have internal predecessors, (524), 173 states have call successors, (187), 88 states have call predecessors, (187), 105 states have return successors, (307), 164 states have call predecessors, (307), 160 states have call successors, (307) [2022-07-22 02:40:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1018 transitions. [2022-07-22 02:40:22,365 INFO L392 hiAutomatonCegarLoop]: Abstraction has 737 states and 1018 transitions. [2022-07-22 02:40:22,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:22,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 02:40:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-07-22 02:40:22,366 INFO L87 Difference]: Start difference. First operand 737 states and 1018 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (11), 10 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:22,716 INFO L93 Difference]: Finished difference Result 879 states and 1234 transitions. [2022-07-22 02:40:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 02:40:22,720 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 879 states and 1234 transitions. [2022-07-22 02:40:22,731 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:22,741 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 879 states to 857 states and 1204 transitions. [2022-07-22 02:40:22,741 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 298 [2022-07-22 02:40:22,741 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 301 [2022-07-22 02:40:22,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 857 states and 1204 transitions. [2022-07-22 02:40:22,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:22,742 INFO L369 hiAutomatonCegarLoop]: Abstraction has 857 states and 1204 transitions. [2022-07-22 02:40:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states and 1204 transitions. [2022-07-22 02:40:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 789. [2022-07-22 02:40:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 492 states have (on average 1.136178861788618) internal successors, (559), 517 states have internal predecessors, (559), 192 states have call successors, (208), 99 states have call predecessors, (208), 105 states have return successors, (306), 172 states have call predecessors, (306), 179 states have call successors, (306) [2022-07-22 02:40:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1073 transitions. [2022-07-22 02:40:22,767 INFO L392 hiAutomatonCegarLoop]: Abstraction has 789 states and 1073 transitions. [2022-07-22 02:40:22,767 INFO L374 stractBuchiCegarLoop]: Abstraction has 789 states and 1073 transitions. [2022-07-22 02:40:22,767 INFO L287 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-07-22 02:40:22,767 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 789 states and 1073 transitions. [2022-07-22 02:40:22,772 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:22,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:22,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:22,773 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 13, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:22,773 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:22,774 INFO L752 eck$LassoCheckResult]: Stem: 11970#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 11971#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 11985#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 11986#fiboENTRY ~n := #in~n; 12101#L8 assume !(~n < 1); 12099#L10 assume !(1 == ~n); 12071#L13 call #t~ret4 := fibo(~n - 1);< 12096#fiboENTRY ~n := #in~n; 12547#L8 assume !(~n < 1); 12468#L10 assume !(1 == ~n); 12074#L13 call #t~ret4 := fibo(~n - 1);< 12075#fiboENTRY ~n := #in~n; 12112#L8 assume !(~n < 1); 12111#L10 assume !(1 == ~n); 12104#L13 call #t~ret4 := fibo(~n - 1);< 12110#fiboENTRY ~n := #in~n; 12409#L8 assume !(~n < 1); 12408#L10 assume !(1 == ~n); 12143#L13 call #t~ret4 := fibo(~n - 1);< 12162#fiboENTRY ~n := #in~n; 12171#L8 assume !(~n < 1); 12165#L10 assume !(1 == ~n); 12132#L13 call #t~ret4 := fibo(~n - 1);< 12144#fiboENTRY ~n := #in~n; 12261#L8 assume !(~n < 1); 12258#L10 assume !(1 == ~n); 12234#L13 call #t~ret4 := fibo(~n - 1);< 12240#fiboENTRY ~n := #in~n; 12239#L8 assume !(~n < 1); 12237#L10 assume !(1 == ~n); 12154#L13 call #t~ret4 := fibo(~n - 1);< 12235#fiboENTRY ~n := #in~n; 12263#L8 assume !(~n < 1); 12262#L10 assume !(1 == ~n); 12251#L13 call #t~ret4 := fibo(~n - 1);< 12260#fiboENTRY ~n := #in~n; 12440#L8 assume !(~n < 1); 12438#L10 assume !(1 == ~n); 12252#L13 call #t~ret4 := fibo(~n - 1);< 12260#fiboENTRY ~n := #in~n; 12441#L8 assume !(~n < 1); 12625#L10 assume 1 == ~n;#res := 1; 12624#fiboFINAL assume true; 12622#fiboEXIT >#33#return; 12618#L13-1 call #t~ret5 := fibo(~n - 2);< 12619#fiboENTRY ~n := #in~n; 12642#L8 assume !(~n < 1); 12643#L10 assume !(1 == ~n); 12648#L13 call #t~ret4 := fibo(~n - 1);< 12657#fiboENTRY ~n := #in~n; 12712#L8 assume !(~n < 1); 12714#L10 assume !(1 == ~n); 12029#L13 call #t~ret4 := fibo(~n - 1);< 12026#fiboENTRY ~n := #in~n; 12030#L8 assume !(~n < 1); 12718#L10 assume !(1 == ~n); 12027#L13 [2022-07-22 02:40:22,774 INFO L754 eck$LassoCheckResult]: Loop: 12027#L13 call #t~ret4 := fibo(~n - 1);< 12026#fiboENTRY ~n := #in~n; 12030#L8 assume !(~n < 1); 12718#L10 assume !(1 == ~n); 12027#L13 [2022-07-22 02:40:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -486527177, now seen corresponding path program 2 times [2022-07-22 02:40:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521026863] [2022-07-22 02:40:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:22,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 02:40:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 02:40:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521026863] [2022-07-22 02:40:22,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521026863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648192418] [2022-07-22 02:40:22,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 02:40:22,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:22,990 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:23,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 02:40:23,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 02:40:23,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 02:40:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 02:40:23,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 02:40:23,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648192418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:23,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:23,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-07-22 02:40:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148701197] [2022-07-22 02:40:23,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:23,154 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2022-07-22 02:40:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:23,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347458587] [2022-07-22 02:40:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:23,158 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:23,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:23,218 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:23,218 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:23,218 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:23,219 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:23,219 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:23,219 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:23,219 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:23,219 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:23,219 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2022-07-22 02:40:23,219 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:23,219 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:23,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:23,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:23,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:23,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:23,262 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:23,262 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:23,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:23,264 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:23,272 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:23,272 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:23,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2022-07-22 02:40:23,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:23,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:23,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:23,308 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:23,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2022-07-22 02:40:23,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:23,310 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:25,062 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:25,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2022-07-22 02:40:25,066 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:25,066 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:25,066 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:25,067 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:25,067 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:25,067 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:25,067 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:25,067 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:25,067 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2022-07-22 02:40:25,067 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:25,067 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:25,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:25,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:25,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:25,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:25,123 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:25,123 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:25,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:25,125 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:25,132 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:25,139 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:25,140 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:25,140 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:25,140 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:25,140 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:25,141 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:25,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:25,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2022-07-22 02:40:25,143 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:25,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2022-07-22 02:40:25,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:25,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:25,160 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:25,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2022-07-22 02:40:25,164 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:25,169 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:25,169 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:25,170 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:25,170 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:25,170 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:25,171 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:25,171 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:25,182 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:25,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2022-07-22 02:40:25,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:25,200 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:25,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2022-07-22 02:40:25,205 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:25,211 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:25,211 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:25,211 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:25,211 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:25,211 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:25,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:25,212 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:25,212 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:25,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:25,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:25,229 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:25,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2022-07-22 02:40:25,232 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:25,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:25,237 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:25,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:25,238 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:25,238 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:25,238 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:25,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:25,240 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:25,241 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 02:40:25,241 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 02:40:25,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:25,243 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:25,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2022-07-22 02:40:25,245 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:25,245 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:25,245 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:25,245 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-22 02:40:25,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2022-07-22 02:40:25,261 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 02:40:25,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:25,491 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-22 02:40:25,491 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,547 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 816 states and 1101 transitions. Complement of second has 18 states. [2022-07-22 02:40:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2022-07-22 02:40:25,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-22 02:40:25,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,549 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 02:40:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:25,766 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-22 02:40:25,767 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,857 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 1046 states and 1417 transitions. Complement of second has 22 states. [2022-07-22 02:40:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2022-07-22 02:40:25,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-22 02:40:25,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 60 letters. Loop has 4 letters. [2022-07-22 02:40:25,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 8 letters. [2022-07-22 02:40:25,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1046 states and 1417 transitions. [2022-07-22 02:40:25,870 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:25,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:25,882 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1046 states to 967 states and 1333 transitions. [2022-07-22 02:40:25,883 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2022-07-22 02:40:25,883 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 327 [2022-07-22 02:40:25,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 967 states and 1333 transitions. [2022-07-22 02:40:25,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:25,884 INFO L369 hiAutomatonCegarLoop]: Abstraction has 967 states and 1333 transitions. [2022-07-22 02:40:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states and 1333 transitions. [2022-07-22 02:40:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 950. [2022-07-22 02:40:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 600 states have (on average 1.125) internal successors, (675), 631 states have internal predecessors, (675), 225 states have call successors, (259), 126 states have call predecessors, (259), 125 states have return successors, (374), 192 states have call predecessors, (374), 212 states have call successors, (374) [2022-07-22 02:40:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1308 transitions. [2022-07-22 02:40:25,908 INFO L392 hiAutomatonCegarLoop]: Abstraction has 950 states and 1308 transitions. [2022-07-22 02:40:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 02:40:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-07-22 02:40:25,909 INFO L87 Difference]: Start difference. First operand 950 states and 1308 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 13 states have internal predecessors, (38), 11 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:26,224 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2022-07-22 02:40:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 02:40:26,225 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 565 states and 661 transitions. [2022-07-22 02:40:26,231 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 02:40:26,231 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 565 states to 0 states and 0 transitions. [2022-07-22 02:40:26,231 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-22 02:40:26,231 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-22 02:40:26,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-22 02:40:26,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 02:40:26,231 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 02:40:26,231 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 02:40:26,231 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 02:40:26,231 INFO L287 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-07-22 02:40:26,231 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-22 02:40:26,232 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 02:40:26,232 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-22 02:40:26,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 02:40:26 BoogieIcfgContainer [2022-07-22 02:40:26,241 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 02:40:26,242 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 02:40:26,242 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 02:40:26,242 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 02:40:26,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:40:10" (3/4) ... [2022-07-22 02:40:26,245 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 02:40:26,245 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 02:40:26,247 INFO L158 Benchmark]: Toolchain (without parser) took 16127.73ms. Allocated memory was 54.5MB in the beginning and 130.0MB in the end (delta: 75.5MB). Free memory was 32.5MB in the beginning and 60.5MB in the end (delta: -28.0MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. [2022-07-22 02:40:26,247 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 54.5MB. Free memory was 37.1MB in the beginning and 37.1MB in the end (delta: 37.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 02:40:26,248 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.82ms. Allocated memory is still 54.5MB. Free memory was 32.3MB in the beginning and 36.7MB in the end (delta: -4.4MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2022-07-22 02:40:26,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.55ms. Allocated memory is still 54.5MB. Free memory was 36.7MB in the beginning and 35.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 02:40:26,248 INFO L158 Benchmark]: Boogie Preprocessor took 58.82ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 35.3MB in the beginning and 57.6MB in the end (delta: -22.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 02:40:26,249 INFO L158 Benchmark]: RCFGBuilder took 261.59ms. Allocated memory is still 73.4MB. Free memory was 57.6MB in the beginning and 49.3MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 02:40:26,249 INFO L158 Benchmark]: BuchiAutomizer took 15576.21ms. Allocated memory was 73.4MB in the beginning and 130.0MB in the end (delta: 56.6MB). Free memory was 49.3MB in the beginning and 61.5MB in the end (delta: -12.3MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2022-07-22 02:40:26,249 INFO L158 Benchmark]: Witness Printer took 3.19ms. Allocated memory is still 130.0MB. Free memory was 61.5MB in the beginning and 60.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 02:40:26,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 54.5MB. Free memory was 37.1MB in the beginning and 37.1MB in the end (delta: 37.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.82ms. Allocated memory is still 54.5MB. Free memory was 32.3MB in the beginning and 36.7MB in the end (delta: -4.4MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.55ms. Allocated memory is still 54.5MB. Free memory was 36.7MB in the beginning and 35.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.82ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 35.3MB in the beginning and 57.6MB in the end (delta: -22.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 261.59ms. Allocated memory is still 73.4MB. Free memory was 57.6MB in the beginning and 49.3MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 15576.21ms. Allocated memory was 73.4MB in the beginning and 130.0MB in the end (delta: 56.6MB). Free memory was 49.3MB in the beginning and 61.5MB in the end (delta: -12.3MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. * Witness Printer took 3.19ms. Allocated memory is still 130.0MB. Free memory was 61.5MB in the beginning and 60.5MB in the end (delta: 1.0MB). 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 11 terminating modules (6 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 6 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 15.4s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 9.4s. Construction of modules took 1.1s. Büchi inclusion checks took 4.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 10. Automata minimization 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 330 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 703 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 671 mSDsluCounter, 812 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 564 mSDsCounter, 529 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1954 IncrementalHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 529 mSolverCounterUnsat, 248 mSDtfsCounter, 1954 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf93 smp77 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 37ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.4s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-22 02:40:26,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:26,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-22 02:40:26,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 02:40:26,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:27,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 02:40:27,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 02:40:27,503 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